Favicon

• test-data-uri.vercel.app (128kb, 256kb, 1mb)
• favicon-data-uri.vercel.app
• test-favicon-ico.vercel.app
• test-favicon-server.vercel.app

Images

• example.com
• httpstat.us/502
• i.imgur.com/CHE6ilh.jpg (source)
• test-403.vercel.app
• test-404.vercel.app
• test-alert.vercel.app
• test-decode-async.vercel.app
• test-http-login.vercel.app
• test-timeout.vercel.app
• time.kikobeats.com
• vercel.com/new/templates
• visual-counter.vercel.app

WebGL

• browserleaks.com/webgl
• get.webgl.org
• webglreport.com?v=2

Emoji

• c.r74n.com/emoji
• emojipedia.org/people/
• getemoji.com/
• smiley.cool/emoji-list.php
• unicode.org/emoji/charts/full-emoji-list.html
• www.copypastecharacter.com/

Markup

• Detect AVIF URLs
• Detect BMP URLs
• Detect ICO URLs
• Detect SVG URLs
• Detect WebP URLs

Typography

• test-font-rendering.vercel.app
• primer.style/design/foundations/typography
• web.mit.edu/jmorzins/www/fonts.html
• www.cssfontstack.com/
• zipcon.net/~swhite/docs/computers/browsers/fonttest.html

Language

• Chinese
• Japanese
• Korean
• Thai

Fingerprint

• amiunique.org
• areyouheadless
• bot.sannysoft.com
• creepjs
• fingerprintjs

Proxy

• geolocation.microlink.io
• httpbin
• test-http.vercel.app
• test-window-location.vercel.app
• test-redirection.vercel.app/?url=https://example.com

Chrome

• chrome://chrome-urls
• chrome://flags
• chrome://version