{"id":29875,"date":"2025-08-12T04:47:31","date_gmt":"2025-08-12T04:47:31","guid":{"rendered":"https:\/\/www.oflox.com\/blog\/?p=29875"},"modified":"2025-08-12T04:51:55","modified_gmt":"2025-08-12T04:51:55","slug":"what-is-content-security-policy","status":"publish","type":"post","link":"https:\/\/www.oflox.com\/blog\/what-is-content-security-policy\/","title":{"rendered":"What is Content Security Policy: A-to-Z Guide for Developers!"},"content":{"rendered":"\n<p>This article offers a professional guide to <strong>What is Content Security Policy<\/strong>, explaining its purpose, importance, and implementation. Continue reading for an in-depth exploration filled with practical insights, examples, and expert recommendations.<\/p>\n\n\n\n<p>In today\u2019s digital age, websites face constant threats from hackers, especially attacks like <strong>Cross-Site Scripting (XSS)<\/strong> and data injection. These attacks can steal sensitive information, redirect users to malicious pages, or even compromise your entire website.<\/p>\n\n\n\n<p>One of the most effective tools to protect your site is the <strong>Content Security Policy (CSP)<\/strong> \u2014 a powerful browser feature that acts like a security guard for your website\u2019s resources. It controls what content can be loaded and from where, helping prevent unauthorized scripts or malicious code from running.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"2560\" height=\"1440\" src=\"https:\/\/www.oflox.com\/blog\/wp-content\/uploads\/2025\/08\/What-is-Content-Security-Policy-scaled.jpg\" alt=\"What is Content Security Policy\" class=\"wp-image-29883\" srcset=\"https:\/\/www.oflox.com\/blog\/wp-content\/uploads\/2025\/08\/What-is-Content-Security-Policy-scaled.jpg 2560w, https:\/\/www.oflox.com\/blog\/wp-content\/uploads\/2025\/08\/What-is-Content-Security-Policy-768x432.jpg 768w, https:\/\/www.oflox.com\/blog\/wp-content\/uploads\/2025\/08\/What-is-Content-Security-Policy-1536x864.jpg 1536w, https:\/\/www.oflox.com\/blog\/wp-content\/uploads\/2025\/08\/What-is-Content-Security-Policy-2048x1152.jpg 2048w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><\/figure>\n\n\n\n<p>In this guide, we\u2019ll explain <strong>what Content Security Policy is<\/strong>, why it\u2019s important, how it works, and how you can implement it effectively.<\/p>\n\n\n\n<p>Let\u2019s explore it together!<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 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-69f5e7bc278b6\" 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-69f5e7bc278b6\"  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\/what-is-content-security-policy\/#What_is_Content_Security_Policy_CSP\" >What is Content Security Policy (CSP)?<\/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\/what-is-content-security-policy\/#Why_is_Content_Security_Policy_Important\" >Why is Content Security Policy Important?<\/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\/what-is-content-security-policy\/#How_Content_Security_Policy_Works\" >How Content Security Policy Works<\/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\/what-is-content-security-policy\/#CSP_Directives_and_Their_Uses\" >CSP Directives and Their Uses<\/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\/what-is-content-security-policy\/#Benefits_of_Implementing_CSP\" >Benefits of Implementing CSP<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.oflox.com\/blog\/what-is-content-security-policy\/#How_to_Implement_Content_Security_Policy\" >How to Implement Content Security Policy<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.oflox.com\/blog\/what-is-content-security-policy\/#1_Using_HTTP_Headers\" >1. Using HTTP Headers<\/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\/what-is-content-security-policy\/#2_Using_Tags\" >2. Using &lt;meta> Tags<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.oflox.com\/blog\/what-is-content-security-policy\/#CSP_Implementation_Examples\" >CSP Implementation Examples<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.oflox.com\/blog\/what-is-content-security-policy\/#Limitations_of_CSP\" >Limitations of CSP<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.oflox.com\/blog\/what-is-content-security-policy\/#Best_Practices_for_CSP\" >Best Practices for CSP<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"h-what-is-content-security-policy-csp\"><span class=\"ez-toc-section\" id=\"What_is_Content_Security_Policy_CSP\"><\/span><strong>What is Content Security Policy (CSP)?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Content Security Policy (CSP)<\/strong> is a security standard introduced by the <strong>World Wide Web Consortium (W3C)<\/strong> and supported by modern browsers. It allows website owners to define which content sources are trusted and should be allowed to load on their site.<\/p>\n\n\n\n<p>For example, you can set rules to only allow scripts from your own domain, block inline JavaScript, or prevent loading of external images from unknown sources.<\/p>\n\n\n\n<p>Think of CSP as a <strong>\u201cwhitelist\u201d for your website\u2019s resources<\/strong> \u2014 if something is not on the list, the browser blocks it.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-why-is-content-security-policy-important\"><span class=\"ez-toc-section\" id=\"Why_is_Content_Security_Policy_Important\"><\/span><strong>Why is Content Security Policy Important?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Cyber attacks are becoming more sophisticated, and traditional security measures are not enough. CSP adds an extra layer of protection by:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Preventing XSS attacks<\/strong> \u2013 Blocks malicious scripts from running.<\/li>\n\n\n\n<li><strong>Reducing data injection risks<\/strong> \u2013 Stops attackers from injecting harmful code.<\/li>\n\n\n\n<li><strong>Protecting user data<\/strong> \u2013 Prevents theft of cookies, login credentials, and personal information.<\/li>\n\n\n\n<li><strong>Increasing trust<\/strong> \u2013 A secure website improves user confidence.<\/li>\n<\/ul>\n\n\n\n<p>For example, in 2023, Google reported that <strong>over 30% of reported web vulnerabilities<\/strong> were related to XSS. Implementing CSP could have prevented many of them.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-content-security-policy-works\"><span class=\"ez-toc-section\" id=\"How_Content_Security_Policy_Works\"><\/span><strong>How Content Security Policy Works<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>CSP works by sending a special HTTP response header called <strong>Content-Security-Policy<\/strong> to the browser. This header contains rules about what resources can be loaded.<\/p>\n\n\n\n<p><strong>Example header:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Content-Security-Policy: default-src 'self'; script-src 'self' https:\/\/apis.google.com\n<\/code><\/pre>\n\n\n\n<p>Here\u2019s what it means:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>default-src &#8216;self&#8217;<\/strong> \u2192 Load all content only from the same domain.<\/li>\n\n\n\n<li><strong>script-src &#8216;self&#8217; https:\/\/apis.google.com<\/strong> \u2192 Allow scripts from your domain and Google\u2019s API.<\/li>\n<\/ul>\n\n\n\n<p>When the browser receives these rules, it blocks any content that doesn\u2019t match them.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-csp-directives-and-their-uses\"><span class=\"ez-toc-section\" id=\"CSP_Directives_and_Their_Uses\"><\/span><strong>CSP Directives and Their Uses<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>CSP rules are made of <strong>directives<\/strong> \u2014 each controls a specific type of content.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Directive<\/th><th>What It Controls<\/th><th>Example<\/th><\/tr><\/thead><tbody><tr><td>default-src<\/td><td>Allowed AJAX, WebSocket, and API calls<\/td><td>default-src &#8216;self&#8217;<\/td><\/tr><tr><td>script-src<\/td><td>Allowed JavaScript sources<\/td><td>script-src &#8216;self&#8217; https:\/\/apis.google.com<\/td><\/tr><tr><td>style-src<\/td><td>Allowed CSS sources<\/td><td>style-src &#8216;self&#8217; &#8216;unsafe-inline&#8217;<\/td><\/tr><tr><td>img-src<\/td><td>Allowed image sources<\/td><td>img-src &#8216;self&#8217; https:\/\/cdn.example.com<\/td><\/tr><tr><td>connect-src<\/td><td>Allowed AJAX, WebSocket, API calls<\/td><td>connect-src &#8216;self&#8217; https:\/\/api.example.com<\/td><\/tr><tr><td>font-src<\/td><td>Allowed fonts<\/td><td>font-src &#8216;self&#8217; https:\/\/fonts.gstatic.com<\/td><\/tr><tr><td>frame-src<\/td><td>Allowed iframes<\/td><td>Allowed AJAX, WebSocket, and API calls<\/td><\/tr><tr><td>media-src<\/td><td>Allowed audio\/video sources<\/td><td>media-src &#8216;self&#8217; https:\/\/cdn.example.com<\/td><\/tr><tr><td>object-src<\/td><td>Allowed plugins (Flash, etc.)<\/td><td>object-src &#8216;none&#8217;<\/td><\/tr><tr><td>report-uri<\/td><td>URL where CSP violation reports are sent<\/td><td>report-uri \/csp-report-endpoint<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-benefits-of-implementing-csp\"><span class=\"ez-toc-section\" id=\"Benefits_of_Implementing_CSP\"><\/span><strong>Benefits of Implementing CSP<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Stronger security<\/strong> \u2013 Stops unauthorized content execution.<\/li>\n\n\n\n<li><strong>Protection against XSS<\/strong> \u2013 One of the most common web attacks.<\/li>\n\n\n\n<li><strong>Compliance with data protection laws<\/strong> \u2013 Helps with GDPR &amp; PCI DSS.<\/li>\n\n\n\n<li><strong>Better performance<\/strong> \u2013 By blocking unnecessary external resources.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-to-implement-content-security-policy\"><span class=\"ez-toc-section\" id=\"How_to_Implement_Content_Security_Policy\"><\/span><strong>How to Implement Content Security Policy<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>You can implement CSP in two main ways:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-using-http-headers\"><span class=\"ez-toc-section\" id=\"1_Using_HTTP_Headers\"><\/span><strong>1. Using HTTP Headers<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Set the Content-Security-Policy header in your server configuration:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Apache<\/strong> (in .htaccess or config file):<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>Header set Content-Security-Policy \"default-src 'self'; script-src 'self'\"\n<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Nginx<\/strong>:<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>add_header Content-Security-Policy \"default-src 'self'; script-src 'self'\";\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-using-lt-meta-tags\"><span class=\"ez-toc-section\" id=\"2_Using_Tags\"><\/span><strong>2. Using &lt;meta> Tags<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>In your HTML &lt;head&gt; section:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&lt;meta http-equiv=\"Content-Security-Policy\" content=\"default-src 'self'; script-src 'self'\"&gt;\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-csp-implementation-examples\"><span class=\"ez-toc-section\" id=\"CSP_Implementation_Examples\"><\/span><strong>CSP Implementation Examples<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>For WordPress:<\/strong> Use plugins like <em>HTTP Headers<\/em> or <em>Security Headers<\/em> to configure CSP without coding.<\/p>\n\n\n\n<p><strong>For Static HTML:<\/strong> Add &lt;meta&gt; tags or configure the web server directly.<\/p>\n\n\n\n<p><strong>For Node.js (Express):<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>app.use((req, res, next) =&gt; {\n  res.setHeader(\"Content-Security-Policy\", \"default-src 'self'; script-src 'self'\");\n  next();\n});\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-limitations-of-csp\"><span class=\"ez-toc-section\" id=\"Limitations_of_CSP\"><\/span><strong>Limitations of CSP<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Not a substitute for secure coding.<\/li>\n\n\n\n<li>Requires careful setup to avoid breaking site functionality.<\/li>\n\n\n\n<li>Some older browsers have limited support.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-best-practices-for-csp\"><span class=\"ez-toc-section\" id=\"Best_Practices_for_CSP\"><\/span><strong>Best Practices for CSP<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Start with <strong>Report-Only Mode<\/strong> to monitor violations without blocking resources:<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>Content-Security-Policy-Report-Only: default-src 'self';\n<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use <strong>nonces<\/strong> or <strong>hashes<\/strong> instead of allowing unsafe-inline.<\/li>\n\n\n\n<li>Keep the policy updated as your website changes.<\/li>\n\n\n\n<li>Test CSP with tools before deploying live.<\/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=\"[HINDI] HTTP Security Headers | Content Security Policy (CSP) | Strict Transport Security (HSTS)\" width=\"1200\" height=\"675\" src=\"https:\/\/www.youtube.com\/embed\/8_nfQAdWELU?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 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-1754890142796\"><strong class=\"schema-faq-question\"><strong>Q. What is the main purpose of CSP?<\/strong><\/strong> <p class=\"schema-faq-answer\"><strong>A. <\/strong>To prevent unauthorized code execution and protect against attacks like XSS.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1754890511714\"><strong class=\"schema-faq-question\"><strong>Q. Is CSP enough to secure my website?<\/strong><\/strong> <p class=\"schema-faq-answer\"><strong>A. <\/strong>No, it\u2019s an additional layer \u2014 you still need secure coding practices.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1754890538536\"><strong class=\"schema-faq-question\"><strong>Q. Does CSP work on all browsers?<\/strong><\/strong> <p class=\"schema-faq-answer\"><strong>A. <\/strong>Most modern browsers support CSP, but older ones may not.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1754890547382\"><strong class=\"schema-faq-question\"><strong>Q. Can CSP block inline JavaScript?<\/strong><\/strong> <p class=\"schema-faq-answer\"><strong>A. <\/strong>Yes, unless you allow it using &#8216;unsafe-inline&#8217;.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1754890557125\"><strong class=\"schema-faq-question\"><strong>Q. How do I test my CSP configuration?<\/strong><\/strong> <p class=\"schema-faq-answer\">Use tools like Mozilla Observatory or CSP Evaluator.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1754893326975\"><strong class=\"schema-faq-question\">Q. Does CSP slow down websites?<\/strong> <p class=\"schema-faq-answer\"><strong>A. <\/strong>No, in most cases, it improves performance by blocking unneeded resources.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1754893354470\"><strong class=\"schema-faq-question\">Q. Will CSP break my site?<\/strong> <p class=\"schema-faq-answer\"><strong>A. <\/strong>If not planned properly, yes. Always test in Report-Only mode first.<\/p> <\/div> <\/div>\n\n\n\n<p style=\"font-size:23px\"><strong>Conclusion:)<\/strong><\/p>\n\n\n\n<p>A <strong>Content Security Policy<\/strong> is one of the most effective ways to protect your website from modern threats like XSS and code injection. By controlling which resources can load, you add a strong security layer without affecting user experience.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><em>\u201cContent Security Policy is the silent bodyguard of your website \u2014 always watching, always protecting, without disrupting the user experience.\u201d \u2013 Mr Rahman, CEO Oflox\u00ae<\/em><\/p>\n<\/blockquote>\n\n\n\n<p><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-open-artificial-intelligence\/\" target=\"_blank\" rel=\"noreferrer noopener\">What is Open Artificial Intelligence: A-to-Z Guide for Beginners!<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.oflox.com\/blog\/what-is-data-leakage-in-cyber-security\/\" target=\"_blank\" rel=\"noreferrer noopener\">What is Data Leakage in Cyber Security: Decode It Like a Pro!<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.oflox.com\/blog\/what-is-gpt-in-chatgpt-and-how-it-works\/\" target=\"_blank\" rel=\"noreferrer noopener\">What is GPT in ChatGPT and How It Works: A Step-by-Step Guide!<\/a><\/li>\n<\/ul>\n\n\n\n<p><em><strong>Have you implemented CSP on your website? Share your experience or ask your questions in the comments below \u2014 we\u2019d love to hear from you!<\/strong><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>This article offers a professional guide to What is Content Security Policy, explaining its purpose, importance, and implementation. Continue reading &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"What is Content Security Policy: A-to-Z Guide for Developers!\" class=\"read-more button\" href=\"https:\/\/www.oflox.com\/blog\/what-is-content-security-policy\/#more-29875\" aria-label=\"More on What is Content Security Policy: A-to-Z Guide for Developers!\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":29883,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2345],"tags":[43500,43503,43501,43502,43504,43499,43505,43507,43506],"class_list":["post-29875","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-internet","tag-content-security-policy","tag-content-security-policy-example","tag-what-is-content-security-policy","tag-what-is-content-security-policy-in-csp","tag-what-is-content-security-policy-xss","tag-what-is-csp","tag-what-is-csp-header","tag-what-is-csp-in-cyber-security","tag-what-is-csp-policy","resize-featured-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is Content Security Policy: A-to-Z Guide for Developers!<\/title>\n<meta name=\"description\" content=\"This article offers a 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Does CSP work on all browsers?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>A. <\/strong>Most modern browsers support CSP, but older ones may not.","inLanguage":"en"},"inLanguage":"en"},{"@type":"Question","@id":"https:\/\/www.oflox.com\/blog\/what-is-content-security-policy\/#faq-question-1754890547382","position":4,"url":"https:\/\/www.oflox.com\/blog\/what-is-content-security-policy\/#faq-question-1754890547382","name":"Q. Can CSP block inline JavaScript?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>A. <\/strong>Yes, unless you allow it using 'unsafe-inline'.","inLanguage":"en"},"inLanguage":"en"},{"@type":"Question","@id":"https:\/\/www.oflox.com\/blog\/what-is-content-security-policy\/#faq-question-1754890557125","position":5,"url":"https:\/\/www.oflox.com\/blog\/what-is-content-security-policy\/#faq-question-1754890557125","name":"Q. How do I test my CSP configuration?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Use tools like Mozilla Observatory or CSP Evaluator.","inLanguage":"en"},"inLanguage":"en"},{"@type":"Question","@id":"https:\/\/www.oflox.com\/blog\/what-is-content-security-policy\/#faq-question-1754893326975","position":6,"url":"https:\/\/www.oflox.com\/blog\/what-is-content-security-policy\/#faq-question-1754893326975","name":"Q. Does CSP slow down websites?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>A. <\/strong>No, in most cases, it improves performance by blocking unneeded resources.","inLanguage":"en"},"inLanguage":"en"},{"@type":"Question","@id":"https:\/\/www.oflox.com\/blog\/what-is-content-security-policy\/#faq-question-1754893354470","position":7,"url":"https:\/\/www.oflox.com\/blog\/what-is-content-security-policy\/#faq-question-1754893354470","name":"Q. Will CSP break my site?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>A. <\/strong>If not planned properly, yes. Always test in Report-Only mode first.","inLanguage":"en"},"inLanguage":"en"}]}},"_links":{"self":[{"href":"https:\/\/www.oflox.com\/blog\/wp-json\/wp\/v2\/posts\/29875","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oflox.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.oflox.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.oflox.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.oflox.com\/blog\/wp-json\/wp\/v2\/comments?post=29875"}],"version-history":[{"count":13,"href":"https:\/\/www.oflox.com\/blog\/wp-json\/wp\/v2\/posts\/29875\/revisions"}],"predecessor-version":[{"id":29891,"href":"https:\/\/www.oflox.com\/blog\/wp-json\/wp\/v2\/posts\/29875\/revisions\/29891"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.oflox.com\/blog\/wp-json\/wp\/v2\/media\/29883"}],"wp:attachment":[{"href":"https:\/\/www.oflox.com\/blog\/wp-json\/wp\/v2\/media?parent=29875"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.oflox.com\/blog\/wp-json\/wp\/v2\/categories?post=29875"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.oflox.com\/blog\/wp-json\/wp\/v2\/tags?post=29875"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}