{"id":55,"date":"2026-10-26T16:20:58","date_gmt":"2026-10-26T16:20:58","guid":{"rendered":"https:\/\/vanebrowser.com\/blog\/?p=55"},"modified":"2026-10-26T16:20:58","modified_gmt":"2026-10-26T16:20:58","slug":"how-to-test-your-browser-fingerprint","status":"publish","type":"post","link":"https:\/\/vanebrowser.com\/blog\/how-to-test-your-browser-fingerprint\/","title":{"rendered":"How to Test Your Browser Fingerprint: Free Tools and What to Look For"},"content":{"rendered":"<p><strong>To test your browser fingerprint, run it through a few free checking tools. Cover Your Tracks (EFF) tells you how unique your browser looks, AmIUnique compares you with a research database, BrowserLeaks shows the raw values sites can read, and CreepJS looks for signs of tampering. Run more than one, because each looks at different signals.<\/strong><\/p>\n<h2>Why test your fingerprint at all?<\/h2>\n<p>A <a href=\"https:\/\/vanebrowser.com\/blog\/what-is-browser-fingerprinting\/\">browser fingerprint<\/a> is built from many ordinary details your browser shares. You can&#8217;t see it by looking at your settings, so the only way to know what a site can read is to ask a tool that reads it the same way.<\/p>\n<p>Testing is useful in three situations:<\/p>\n<ul>\n<li>You want to know how identifiable your everyday browser is.<\/li>\n<li>You changed something (a browser, an extension, a VPN or proxy) and want to see the effect.<\/li>\n<li>You manage several browser profiles and want to check each one looks consistent.<\/li>\n<\/ul>\n<h2>Which free tools can you use?<\/h2>\n<table>\n<thead>\n<tr>\n<th>Tool<\/th>\n<th>Run by<\/th>\n<th>Best for<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><a href=\"https:\/\/coveryourtracks.eff.org\/\" target=\"_blank\" rel=\"noopener\">Cover Your Tracks<\/a><\/td>\n<td>Electronic Frontier Foundation<\/td>\n<td>A quick view of how unique your browser is, and whether your tracker blockers work<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/amiunique.org\/\" target=\"_blank\" rel=\"noopener\">AmIUnique<\/a><\/td>\n<td>A research team at a French university<\/td>\n<td>Comparing your fingerprint with statistics from other visitors<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/browserleaks.com\/\" target=\"_blank\" rel=\"noopener\">BrowserLeaks<\/a><\/td>\n<td>Independent collection of tests<\/td>\n<td>The raw values: IP and WebRTC, canvas, WebGL, fonts and more<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/abrahamjuliot.github.io\/creepjs\/\" target=\"_blank\" rel=\"noopener\">CreepJS<\/a><\/td>\n<td>Open-source research project<\/td>\n<td>Spotting inconsistencies and signs of tampering<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Cover Your Tracks<\/strong> is an EFF project. It tests how unique your browser is and how well your tracker blockers hold up against simulated trackers (<a href=\"https:\/\/coveryourtracks.eff.org\/about\" target=\"_blank\" rel=\"noopener\">about page<\/a>).<\/p>\n<p><strong>AmIUnique<\/strong> is a research site that studies the diversity of browser fingerprints. It shows your own fingerprint next to statistics from other visitors. Note that it saves a cookie for a few months when you click through to your results, so run it knowing that.<\/p>\n<p><strong>BrowserLeaks<\/strong> collects tests for IP address and WebRTC leaks, browser data readable by JavaScript, canvas, WebGL and font fingerprinting, geolocation, and more, including some experimental ones such as a DNS leak test.<\/p>\n<p><strong>CreepJS<\/strong> is described by its authors as a research and education project on fingerprinting. It looks for signs of tampering with browser functions and for inconsistencies, which makes it a good check for a browser that claims to hide things (<a href=\"https:\/\/github.com\/abrahamjuliot\/creepjs\" target=\"_blank\" rel=\"noopener\">project page<\/a>).<\/p>\n<p>Other checkers exist, including commercial ones that give a score. Treat any single score with care: tools measure different things, and a number only means something if you know what it checks.<\/p>\n<h2>How do you run a clean test?<\/h2>\n<ol>\n<li><strong>Use a fresh state.<\/strong> Open the tool in the browser or profile you want to test, without other tabs doing things in the background.<\/li>\n<li><strong>Run it twice.<\/strong> Once with your VPN or proxy off, and once with it on, so you can compare.<\/li>\n<li><strong>Run it in more than one tool.<\/strong> If two tools disagree, the difference tells you something.<\/li>\n<li><strong>Write the results down.<\/strong> Note the date, the browser version and any settings, so you can compare later.<\/li>\n<li><strong>Run it again after a change.<\/strong> A browser update, a new extension or a new proxy can change the result.<\/li>\n<\/ol>\n<h2>What should you look for in the results?<\/h2>\n<p><strong>1. Uniqueness.<\/strong> Tools such as Cover Your Tracks and AmIUnique tell you how rare your combination of values is. The rarer it is, the easier you are to follow. A common setup is harder to single out.<\/p>\n<p><strong>2. Contradictions.<\/strong> This matters most. Look for values that don&#8217;t fit together:<\/p>\n<ul>\n<li>A time zone that doesn&#8217;t match the country of your IP address.<\/li>\n<li>A language that doesn&#8217;t fit your region.<\/li>\n<li>An operating system in the browser&#8217;s identity that doesn&#8217;t match the fonts or graphics hardware reported.<\/li>\n<li>A screen size that doesn&#8217;t fit the device the browser claims to be.<\/li>\n<\/ul>\n<p>Contradictions are a stronger signal than any single unusual value, because ordinary devices rarely produce them.<\/p>\n<p><strong>3. Leaks.<\/strong> Check that your real IP address doesn&#8217;t appear in the WebRTC results, and that DNS is handled where you expect. Our guide to <a href=\"https:\/\/vanebrowser.com\/blog\/webrtc-and-dns-leaks-explained\/\">WebRTC and DNS leaks<\/a> explains both.<\/p>\n<h2>What do the results not tell you?<\/h2>\n<ul>\n<li><strong>They don&#8217;t tell you what a particular website does.<\/strong> A test shows what a site could read, not what it chooses to use or how.<\/li>\n<li><strong>They are a snapshot.<\/strong> Results change with browser updates and settings.<\/li>\n<li><strong>A &#8220;clean&#8221; result on one tool isn&#8217;t a guarantee.<\/strong> Different tools look at different signals, so a pass on one says nothing about another.<\/li>\n<\/ul>\n<h2>Frequently asked questions<\/h2>\n<h3>Is it safe to run a fingerprint test?<\/h3>\n<p>These tools read the same details any website can read. Check each site&#8217;s privacy notice, and be aware that some, such as AmIUnique, save a cookie.<\/p>\n<h3>Why do different tools give different answers?<\/h3>\n<p>Each looks at different signals and compares you against different data. A tool that measures uniqueness and one that looks for tampering answer different questions.<\/p>\n<h3>How often should I test?<\/h3>\n<p>After you change a browser, extension, VPN or proxy, and from time to time as a check.<\/p>\n<h3>Does a unique fingerprint mean I&#8217;m being tracked?<\/h3>\n<p>No. It means you could be followed by a site that chose to. Whether anyone does is a separate question.<\/p>\n<h3>Can I make my fingerprint less unique?<\/h3>\n<p>You can reduce what your browser reveals or keep separate, consistent identities for different purposes. Either way, test again afterwards to confirm the change worked.<\/p>\n<h2>Key takeaways<\/h2>\n<ul>\n<li>Use more than one tool. Each checks different things.<\/li>\n<li>Compare with and without your VPN or proxy.<\/li>\n<li>Contradictions between values matter more than any single unusual one.<\/li>\n<li>Test again after every change.<\/li>\n<\/ul>\n<p><em>Last updated: 2026-10-26. By the VANE Team.<\/em><\/p>\n\n<script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is it safe to run a fingerprint test?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"These tools read the same details any website can read. Check each site's privacy notice, and be aware that some, such as AmIUnique, save a cookie.\"}}, {\"@type\": \"Question\", \"name\": \"Why do different tools give different answers?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Each looks at different signals and compares you against different data. A tool that measures uniqueness and one that looks for tampering answer different questions.\"}}, {\"@type\": \"Question\", \"name\": \"How often should I test?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"After you change a browser, extension, VPN or proxy, and from time to time as a check.\"}}, {\"@type\": \"Question\", \"name\": \"Does a unique fingerprint mean I'm being tracked?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. It means you could be followed by a site that chose to. Whether anyone does is a separate question.\"}}, {\"@type\": \"Question\", \"name\": \"Can I make my fingerprint less unique?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"You can reduce what your browser reveals or keep separate, consistent identities for different purposes. Either way, test again afterwards to confirm the change worked.\"}}]}<\/script>\n\n","protected":false},"excerpt":{"rendered":"<p>Four free tools show what your browser reveals: Cover Your Tracks, AmIUnique, BrowserLeaks and CreepJS. Learn what each one tests and how to read the results.<\/p>\n","protected":false},"author":2,"featured_media":59,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":["post-55","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fingerprinting-and-detection"],"_links":{"self":[{"href":"https:\/\/vanebrowser.com\/blog\/wp-json\/wp\/v2\/posts\/55","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vanebrowser.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vanebrowser.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vanebrowser.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/vanebrowser.com\/blog\/wp-json\/wp\/v2\/comments?post=55"}],"version-history":[{"count":1,"href":"https:\/\/vanebrowser.com\/blog\/wp-json\/wp\/v2\/posts\/55\/revisions"}],"predecessor-version":[{"id":64,"href":"https:\/\/vanebrowser.com\/blog\/wp-json\/wp\/v2\/posts\/55\/revisions\/64"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vanebrowser.com\/blog\/wp-json\/wp\/v2\/media\/59"}],"wp:attachment":[{"href":"https:\/\/vanebrowser.com\/blog\/wp-json\/wp\/v2\/media?parent=55"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vanebrowser.com\/blog\/wp-json\/wp\/v2\/categories?post=55"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vanebrowser.com\/blog\/wp-json\/wp\/v2\/tags?post=55"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}