{"id":33318,"date":"2026-01-12T04:58:07","date_gmt":"2026-01-12T04:58:07","guid":{"rendered":"https:\/\/www.oflox.com\/blog\/?p=33318"},"modified":"2026-01-12T04:59:49","modified_gmt":"2026-01-12T04:59:49","slug":"how-to-make-a-web-crawler","status":"publish","type":"post","link":"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/","title":{"rendered":"How to Make a Web Crawler: A-to-Z Guide for Beginners!"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">This article offers a professional, beginner-friendly guide on <strong>how to make a web crawler from scratch<\/strong>. If you are a developer, SEO professional, or tech-savvy marketer, understanding web crawlers can help you automate data collection, analyze websites, and build powerful tools.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A web crawler is one of the most important building blocks behind search engines, SEO tools, price trackers, and monitoring systems<\/strong>. Even if you are not building the next Google, learning how a crawler works will massively improve your technical and analytical skills.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"2240\" height=\"1260\" src=\"https:\/\/www.oflox.com\/blog\/wp-content\/uploads\/2026\/01\/How-to-Make-a-Web-Crawler.jpg\" alt=\"How to Make a Web Crawler\" class=\"wp-image-33341\" srcset=\"https:\/\/www.oflox.com\/blog\/wp-content\/uploads\/2026\/01\/How-to-Make-a-Web-Crawler.jpg 2240w, https:\/\/www.oflox.com\/blog\/wp-content\/uploads\/2026\/01\/How-to-Make-a-Web-Crawler-768x432.jpg 768w, https:\/\/www.oflox.com\/blog\/wp-content\/uploads\/2026\/01\/How-to-Make-a-Web-Crawler-1536x864.jpg 1536w, https:\/\/www.oflox.com\/blog\/wp-content\/uploads\/2026\/01\/How-to-Make-a-Web-Crawler-2048x1152.jpg 2048w\" sizes=\"auto, (max-width: 2240px) 100vw, 2240px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">In this guide, we will break everything down in <strong>simple English<\/strong>, explain concepts step by step, and show practical examples using <strong>Python and Node.js<\/strong>\u2014no advanced background required.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Let\u2019s explore it together!<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a1b90a09740e\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a1b90a09740e\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#What_Is_a_Web_Crawler\" >What Is a Web Crawler?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#What_Does_a_Web_Crawler_Do\" >What Does a Web Crawler Do?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#Web_Crawler_vs_Web_Scraper_Important_Difference\" >Web Crawler vs Web Scraper (Important Difference)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#Why_Should_You_Build_Your_Own_Web_Crawler\" >Why Should You Build Your Own Web Crawler?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#How_Does_a_Web_Crawler_Work_Step-by-Step\" >How Does a Web Crawler Work? (Step-by-Step)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#1_Start_With_Seed_URLs\" >1. Start With Seed URLs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#2_Fetch_the_Web_Page\" >2. Fetch the Web Page<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#3_Parse_the_HTML\" >3. Parse the HTML<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#4_Extract_Links\" >4. Extract Links<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#5_Add_New_URLs_to_Queue\" >5. Add New URLs to Queue<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#6_Avoid_Duplicate_Pages\" >6. Avoid Duplicate Pages<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#7_Repeat_the_Process\" >7. Repeat the Process<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#Core_Components_of_a_Web_Crawler\" >Core Components of a Web Crawler<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#Tools_Technologies_for_Building_a_Web_Crawler\" >Tools &amp; Technologies for Building a Web Crawler<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#Recommended_Languages\" >Recommended Languages<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#Python_Libraries_Youll_Need\" >Python Libraries You\u2019ll Need:<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#How_to_Make_a_Web_Crawler_in_Python\" >How to Make a Web Crawler in Python?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#1_Install_Required_Libraries\" >1. Install Required Libraries<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#2_Basic_Crawling_Logic_Concept\" >2. Basic Crawling Logic (Concept)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#3_Example_Python_Logic_Simplified\" >3. Example Python Logic (Simplified)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#How_to_Make_a_Web_Crawler_in_Nodejs\" >How to Make a Web Crawler in Node.js?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#1_Install_Packages\" >1. Install Packages<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#2_Core_Logic_Concept\" >2. Core Logic (Concept)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#Important_Best_Practices_for_Web_Crawling\" >Important Best Practices for Web Crawling<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#1_Respect_robotstxt\" >1. Respect robots.txt<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#2_Use_Delays_Very_Important\" >2. Use Delays (Very Important)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#3_Set_User-Agent\" >3. Set User-Agent<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#4_Avoid_Infinite_Loops\" >4. Avoid Infinite Loops<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#Handling_Common_Challenges_in_Web_Crawling\" >Handling Common Challenges in Web Crawling<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#1_JavaScript-Rendered_Pages\" >1. JavaScript-Rendered Pages<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#2_Duplicate_URLs\" >2. Duplicate URLs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#3_Rate_Limiting_Blocks\" >3. Rate Limiting &amp; Blocks<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#Ethical_Crawling_Rules_You_MUST_Follow\" >Ethical Crawling: Rules You MUST Follow<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#1_Respect_robotstxt-2\" >1. Respect robots.txt<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#2_Avoid_Overloading_Servers\" >2. Avoid Overloading Servers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#3_Identify_Your_Bot\" >3. Identify Your Bot<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-37\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#Scaling_a_Web_Crawler_Advanced_Overview\" >Scaling a Web Crawler (Advanced Overview)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-38\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#Real-Life_Use_Cases_of_Web_Crawlers\" >Real-Life Use Cases of Web Crawlers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-39\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#Is_Web_Crawling_Legal\" >Is Web Crawling Legal?<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"h-what-is-a-web-crawler\"><span class=\"ez-toc-section\" id=\"What_Is_a_Web_Crawler\"><\/span>What Is a Web Crawler?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>web crawler<\/strong> (also called a spider or bot) is a program that automatically visits web pages, reads their content, follows links, and collects data.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In simple words:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong><strong>A web crawler is a software bot that goes from one web page to another, just like a human clicking links\u2014only much faster and automatically.<\/strong><\/strong><\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Web crawlers are also known as:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Web spiders<\/li>\n\n\n\n<li>Bots<\/li>\n\n\n\n<li>Crawling agents<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Real-World Examples of Web Crawlers:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Googlebot (Google Search)<\/li>\n\n\n\n<li>Bingbot (Bing Search)<\/li>\n\n\n\n<li>SEO audit tools (Ahrefs, Semrush)<\/li>\n\n\n\n<li>Price comparison tools<\/li>\n\n\n\n<li>News aggregation platforms<\/li>\n\n\n\n<li>Job listing aggregators<\/li>\n\n\n\n<li>AI data collection systems<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-does-a-web-crawler-do\"><span class=\"ez-toc-section\" id=\"What_Does_a_Web_Crawler_Do\"><\/span><strong>What Does a Web Crawler Do?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A typical crawler performs these tasks:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Starts with one or more URLs (called <strong>seed URLs<\/strong>)<\/li>\n\n\n\n<li>Downloads the web page<\/li>\n\n\n\n<li>Extracts links from the page<\/li>\n\n\n\n<li>Visit those links one by one<\/li>\n\n\n\n<li>Repeat the process<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Search engines like Google use crawlers to discover and index web pages. SEO tools use crawlers to audit websites. Businesses use crawlers to monitor competitors and prices.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-web-crawler-vs-web-scraper-important-difference\"><span class=\"ez-toc-section\" id=\"Web_Crawler_vs_Web_Scraper_Important_Difference\"><\/span>Web Crawler vs Web Scraper (Important Difference)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Many beginners confuse crawlers with scrapers. Let\u2019s clear that up.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Feature<\/th><th>Web Crawler<\/th><th>Web Scraper<\/th><\/tr><\/thead><tbody><tr><td>Main purpose<\/td><td>Discover &amp; navigate pages<\/td><td>Extract specific data<\/td><\/tr><tr><td>Follows links<\/td><td>Yes<\/td><td>Not always<\/td><\/tr><tr><td>Used for<\/td><td>Indexing, audits, monitoring<\/td><td>Data extraction<\/td><\/tr><tr><td>Example<\/td><td>Googlebot<\/td><td>Product price scraper<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Crawler = navigation<\/strong><\/li>\n\n\n\n<li><strong>Scraper = data extraction<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">In real projects, both are often used together.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-why-should-you-build-your-own-web-crawler\"><span class=\"ez-toc-section\" id=\"Why_Should_You_Build_Your_Own_Web_Crawler\"><\/span>Why Should You Build Your Own Web Crawler?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Building your own crawler gives you full control and flexibility.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"h-real-world-use-cases\"><strong>Real-World Use Cases:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SEO website audits<\/li>\n\n\n\n<li>Broken link checking<\/li>\n\n\n\n<li>Price comparison tools<\/li>\n\n\n\n<li>Content monitoring<\/li>\n\n\n\n<li>Competitor analysis<\/li>\n\n\n\n<li>Job listings aggregation<\/li>\n\n\n\n<li>Research and data analysis<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>\u201cUnderstanding crawlers is like learning how the internet is mapped behind the scenes.\u201d \u2013 Mr Rahman, CEO Oflox\u00ae<\/strong><\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Does_a_Web_Crawler_Work_Step-by-Step\"><\/span>How Does a Web Crawler Work? (Step-by-Step)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A basic web crawler follows a simple loop:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-start-with-seed-urls\"><span class=\"ez-toc-section\" id=\"1_Start_With_Seed_URLs\"><\/span>1. <strong>Start With Seed URLs<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">These are the first URLs where crawling begins.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Example:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>https:&#47;&#47;example.com<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-fetch-the-web-page\"><span class=\"ez-toc-section\" id=\"2_Fetch_the_Web_Page\"><\/span>2. <strong>Fetch the Web Page<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The crawler sends an HTTP request to download the page&#8217;s HTML.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-parse-the-html\"><span class=\"ez-toc-section\" id=\"3_Parse_the_HTML\"><\/span>3. <strong>Parse the HTML<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The crawler reads the page structure and content.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-4-extract-links\"><span class=\"ez-toc-section\" id=\"4_Extract_Links\"><\/span>4. <strong>Extract Links<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">All <strong>&lt;a href=&#8221;&#8221;&gt; <\/strong>links are collected.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-5-add-new-urls-to-queue\"><span class=\"ez-toc-section\" id=\"5_Add_New_URLs_to_Queue\"><\/span>5. <strong>Add New URLs to Queue<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">New links are added to a queue for crawling.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-6-avoid-duplicate-pages\"><span class=\"ez-toc-section\" id=\"6_Avoid_Duplicate_Pages\"><\/span>6. <strong>Avoid Duplicate Pages<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Already-visited URLs are skipped.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-7-repeat-the-process\"><span class=\"ez-toc-section\" id=\"7_Repeat_the_Process\"><\/span>7. <strong>Repeat the Process<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The crawler continues until:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Page limit is reached<\/li>\n\n\n\n<li>Depth limit is reached<\/li>\n\n\n\n<li>The queue is empty<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Core_Components_of_a_Web_Crawler\"><\/span>Core Components of a Web Crawler<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Every crawler has these basic components:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>URL Queue<\/strong> \u2013 List of pages to visit<\/li>\n\n\n\n<li><strong>Visited Set<\/strong> \u2013 Prevents duplicate crawling<\/li>\n\n\n\n<li><strong>Downloader<\/strong> \u2013 Fetches page HTML<\/li>\n\n\n\n<li><strong>Parser<\/strong> \u2013 Reads and processes HTML<\/li>\n\n\n\n<li><strong>Link Extractor<\/strong> \u2013 Finds new URLs<\/li>\n\n\n\n<li><strong>Storage<\/strong> \u2013 Saves data (CSV, JSON, DB)<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Tools_Technologies_for_Building_a_Web_Crawler\"><\/span>Tools &amp; Technologies for Building a Web Crawler<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A web crawler\u2019s performance and scalability largely depend on the programming language, libraries, and infrastructure used.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Recommended_Languages\"><\/span><strong>Recommended Languages<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Python<\/strong> (Best for beginners)<\/li>\n\n\n\n<li>JavaScript (Node.js)<\/li>\n\n\n\n<li>C#<\/li>\n\n\n\n<li>Java<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udc49 We\u2019ll use <strong>Python<\/strong> in this guide.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-python-libraries-you-ll-need\"><span class=\"ez-toc-section\" id=\"Python_Libraries_Youll_Need\"><\/span><strong>Python Libraries You\u2019ll Need:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Library<\/th><th>Purpose<\/th><\/tr><\/thead><tbody><tr><td>requests<\/td><td>Send HTTP requests<\/td><\/tr><tr><td>BeautifulSoup<\/td><td>Parse HTML<\/td><\/tr><tr><td>urllib<\/td><td>Handle URLs<\/td><\/tr><tr><td>time<\/td><td>Add delays<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Install them:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>pip install requests beautifulsoup4<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-to-make-a-web-crawler-in-python\"><span class=\"ez-toc-section\" id=\"How_to_Make_a_Web_Crawler_in_Python\"><\/span>How to Make a Web Crawler in Python?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Let\u2019s start with a beginner-friendly approach.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-install-required-libraries\"><span class=\"ez-toc-section\" id=\"1_Install_Required_Libraries\"><\/span>1. <strong>Install Required Libraries<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>pip install requests beautifulsoup4\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-basic-crawling-logic-concept\"><span class=\"ez-toc-section\" id=\"2_Basic_Crawling_Logic_Concept\"><\/span>2. <strong>Basic Crawling Logic (Concept)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Fetch the page<\/li>\n\n\n\n<li>Parse HTML<\/li>\n\n\n\n<li>Extract links<\/li>\n\n\n\n<li>Store visited URLs<\/li>\n\n\n\n<li>Repeat<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-example-python-logic-simplified\"><span class=\"ez-toc-section\" id=\"3_Example_Python_Logic_Simplified\"><\/span>3. <strong>Example Python Logic (Simplified)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>import requests\nfrom bs4 import BeautifulSoup\n\nvisited = set()\n\ndef crawl(url):\n    if url in visited:\n        return\n    visited.add(url)\n\n    response = requests.get(url)\n    soup = BeautifulSoup(response.text, 'html.parser')\n\n    print(\"Crawling:\", url)\n\n    for link in soup.find_all('a'):\n        href = link.get('href')\n        if href and href.startswith('http'):\n            crawl(href)\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udc49 This example shows <strong>core crawling logic<\/strong>, not production-ready code.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-to-make-a-web-crawler-in-node-js\"><span class=\"ez-toc-section\" id=\"How_to_Make_a_Web_Crawler_in_Nodejs\"><\/span>How to Make a Web Crawler in Node.js?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Node.js is an excellent choice for building web crawlers, especially when handling multiple requests concurrently using its event-driven, asynchronous model.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-install-packages\"><span class=\"ez-toc-section\" id=\"1_Install_Packages\"><\/span>1. <strong>Install Packages<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>npm install axios cheerio\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-core-logic-concept\"><span class=\"ez-toc-section\" id=\"2_Core_Logic_Concept\"><\/span>2. <strong>Core Logic (Concept)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>const axios = require('axios');\nconst cheerio = require('cheerio');\n\nasync function crawl(url) {\n  const { data } = await axios.get(url);\n  const $ = cheerio.load(data);\n\n  console.log(\"Crawling:\", url);\n\n  $('a').each((i, el) =&gt; {\n    const link = $(el).attr('href');\n    if (link &amp;&amp; link.startsWith('http')) {\n      \/\/ add to queue\n    }\n  });\n}\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Node.js crawlers are excellent for large-scale async operations.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Important_Best_Practices_for_Web_Crawling\"><\/span>Important Best Practices for Web Crawling<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Building a web crawler is not just about writing code\u2014following the right best practices is equally important to crawl websites safely and responsibly.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Respect_robotstxt\"><\/span>1. <strong>Respect robots.txt<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Always check:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>https:&#47;&#47;example.com\/robots.txt<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Never crawl blocked pages.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Use_Delays_Very_Important\"><\/span>2. <strong>Use Delays (Very Important)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Never send too many requests too fast.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>time.sleep(1)<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Set_User-Agent\"><\/span>3. <strong>Set User-Agent<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>headers = {\n    \"User-Agent\": \"MyCrawler\/1.0\"\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Avoid_Infinite_Loops\"><\/span>4. <strong>Avoid Infinite Loops<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Use:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Visited set<\/li>\n\n\n\n<li>Max depth<\/li>\n\n\n\n<li>Page limits<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-handling-common-challenges-in-web-crawling\"><span class=\"ez-toc-section\" id=\"Handling_Common_Challenges_in_Web_Crawling\"><\/span>Handling Common Challenges in Web Crawling<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">While building a web crawler is straightforward, handling common crawling challenges is essential to ensure stability, accuracy, and long-term reliability.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-javascript-rendered-pages\"><span class=\"ez-toc-section\" id=\"1_JavaScript-Rendered_Pages\"><\/span>1. <strong>JavaScript-Rendered Pages<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Solution:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Puppeteer<\/li>\n\n\n\n<li>Playwright<\/li>\n\n\n\n<li>Selenium<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-duplicate-urls\"><span class=\"ez-toc-section\" id=\"2_Duplicate_URLs\"><\/span>2. <strong>Duplicate URLs<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Solution:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use hash sets<\/li>\n\n\n\n<li>Normalize URLs<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-rate-limiting-amp-blocks\"><span class=\"ez-toc-section\" id=\"3_Rate_Limiting_Blocks\"><\/span>3. <strong>Rate Limiting &amp; Blocks<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Solution:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Delays<\/li>\n\n\n\n<li>Proxy rotation<\/li>\n\n\n\n<li>IP management<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-ethical-crawling-rules-you-must-follow\"><span class=\"ez-toc-section\" id=\"Ethical_Crawling_Rules_You_MUST_Follow\"><\/span>Ethical Crawling: Rules You MUST Follow<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Before writing a single line of code, understand this.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-respect-robots-txt\"><span class=\"ez-toc-section\" id=\"1_Respect_robotstxt-2\"><\/span>1. <strong>Respect robots.txt<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">robots.txt tells crawlers what they are allowed to crawl.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Always check:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>https:&#47;&#47;example.com\/robots.txt\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Ignoring this can get your IP blocked.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-avoid-overloading-servers\"><span class=\"ez-toc-section\" id=\"2_Avoid_Overloading_Servers\"><\/span>2. <strong>Avoid Overloading Servers<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Add delays between requests<\/li>\n\n\n\n<li>Limit concurrent requests<\/li>\n\n\n\n<li>Crawl slowly<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-identify-your-bot\"><span class=\"ez-toc-section\" id=\"3_Identify_Your_Bot\"><\/span>3. <strong>Identify Your Bot<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Use a proper <strong>User-Agent<\/strong>:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>User-Agent: MyCrawlerBot\/1.0 (contact@email.com)\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Ethical crawling keeps the internet healthy.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Scaling_a_Web_Crawler_Advanced_Overview\"><\/span>Scaling a Web Crawler (Advanced Overview)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For large projects:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use <strong>Scrapy framework<\/strong><\/li>\n\n\n\n<li>Add <strong>async crawling<\/strong><\/li>\n\n\n\n<li>Store data in databases<\/li>\n\n\n\n<li>Use task queues<\/li>\n\n\n\n<li>Run crawlers in containers (Docker)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Real-Life_Use_Cases_of_Web_Crawlers\"><\/span>Real-Life Use Cases of Web Crawlers<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Search engines indexing<\/li>\n\n\n\n<li>SEO audits<\/li>\n\n\n\n<li>Price comparison tools<\/li>\n\n\n\n<li>News aggregators<\/li>\n\n\n\n<li>Job portals<\/li>\n\n\n\n<li>AI training datasets<\/li>\n\n\n\n<li>Lead generation tools<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u201cWeb crawlers are the foundation of data-driven decision making on the internet.\u201d \u2014 <strong>Mr Rahman, CEO Oflox\u00ae<\/strong><\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Is_Web_Crawling_Legal\"><\/span>Is Web Crawling Legal?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Yes, crawling <strong>public data<\/strong> is generally allowed, but crawling private or restricted content is illegal<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Always:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Read the terms of service<\/li>\n\n\n\n<li>Respect robots.txt<\/li>\n\n\n\n<li>Avoid personal data<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"How to Build a Web Crawler in JavaScript (Node.js)\" width=\"1200\" height=\"675\" src=\"https:\/\/www.youtube.com\/embed\/C0pXaNchNTA?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"h-faqs\" style=\"font-size:23px\"><strong>FAQs:)<\/strong><\/p>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1768023779888\"><strong class=\"schema-faq-question\">Q. Is web crawling legal?<\/strong> <p class=\"schema-faq-answer\"><strong>A. <\/strong>Yes, if you respect robots.txt and website policies.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768023792590\"><strong class=\"schema-faq-question\">Q. Can beginners build a crawler?<\/strong> <p class=\"schema-faq-answer\"><strong>A. <\/strong>Absolutely. Start small and scale gradually.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768023793749\"><strong class=\"schema-faq-question\">Q. Which language is best for crawling?<\/strong> <p class=\"schema-faq-answer\"><strong>A. <\/strong>Python for beginners, Node.js for async-heavy systems.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768023808745\"><strong class=\"schema-faq-question\">Q. Can crawlers get blocked?<\/strong> <p class=\"schema-faq-answer\"><strong>A. <\/strong>Yes, if they crawl aggressively or ignore rules.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768024917611\"><strong class=\"schema-faq-question\">Q. Is building a web crawler hard?<\/strong> <p class=\"schema-faq-answer\"><strong>A. <\/strong>No. A basic crawler is easy to build with Python.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768024925570\"><strong class=\"schema-faq-question\">Q. Is web crawling legal?<\/strong> <p class=\"schema-faq-answer\"><strong>A. <\/strong>Yes, if you crawl public pages responsibly.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768024926310\"><strong class=\"schema-faq-question\">Q. Can I crawl Google?<\/strong> <p class=\"schema-faq-answer\"><strong>A. <\/strong>No. Google blocks unauthorized crawling.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768024940273\"><strong class=\"schema-faq-question\">Q. Which language is best for web crawling?<\/strong> <p class=\"schema-faq-answer\"><strong>A. <\/strong>Python is the best for beginners.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768024951454\"><strong class=\"schema-faq-question\">Q. What is Scrapy?<\/strong> <p class=\"schema-faq-answer\"><strong>A. <\/strong>A powerful Python framework for large-scale crawling.<\/p> <\/div> <\/div>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"h-conclusion\" style=\"font-size:23px\"><strong>Conclusion:)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Building a web crawler is one of the most valuable skills for developers and SEO professionals. It helps you understand how the web works, how search engines think, and how data flows across websites.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Once you master the basics, you can scale your crawler into a powerful tool for SEO, research, and automation.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong><em>\u201cLearning how web crawlers work is the first step toward mastering SEO, data engineering, and modern web intelligence.\u201d \u2014 Mr Rahman, CEO Oflox\u00ae<\/em><\/strong><\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Read also:)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.oflox.com\/blog\/what-is-web-crawler\/\" target=\"_blank\" rel=\"noreferrer noopener\">What Is Web Crawler: A-to-Z Guide for Beginners!<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.oflox.com\/blog\/top-10-award-winning-websites\/\" target=\"_blank\" rel=\"noreferrer noopener\">Top 10 Award-Winning Websites: Learn What Makes Them Best!<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.oflox.com\/blog\/what-is-cookies-in-website\/\" target=\"_blank\" rel=\"noreferrer noopener\">What is Cookies in Website: A-to-Z Guide for Beginners!<\/a><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><em>Have you tried building a web crawler for your SEO, data, or automation projects? Share your experience or ask your questions in the comments below \u2014 we\u2019d love to hear from you!<\/em><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>This article offers a professional, beginner-friendly guide on how to make a web crawler from scratch. If you are a &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"How to Make a Web Crawler: A-to-Z Guide for Beginners!\" class=\"read-more button\" href=\"https:\/\/www.oflox.com\/blog\/how-to-make-a-web-crawler\/#more-33318\" aria-label=\"More on How to Make a Web Crawler: A-to-Z Guide for Beginners!\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":33341,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2345],"tags":[46395,46399,33141,46404,28391,45226,46400,46401,46397,46392,46396,25066,46398,45212,28374,28387,46403,46402,46393,46394],"class_list":["post-33318","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-internet","tag-build-web-crawler","tag-create-a-web-crawler-in-python","tag-data-extraction","tag-design-web-crawler-leetcode","tag-free-web-crawler","tag-how-to-make-a-web-crawler","tag-how-to-make-a-web-crawler-from-scratch","tag-how-to-make-a-web-crawler-in-javascript","tag-python-tutorial","tag-python-web-crawler","tag-seo-crawling","tag-software-development","tag-web-automation","tag-web-crawler","tag-web-crawler-example","tag-web-crawler-python","tag-web-crawler-tutorial","tag-web-crawler-vs-web-scraper","tag-web-crawling","tag-web-scraping-basics","resize-featured-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Make a Web Crawler: A-to-Z Guide for Beginners!<\/title>\n<meta name=\"description\" content=\"This article offers a professional, beginner-friendly guide on how to make a web crawler from scratch. 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