@ericlaw built this page long ago; it's now used as a quick place to poke interesting Web Browser APIs.

Your User-Agent String

CCBot/2.0 (https://commoncrawl.org/faq/)

Your User-Agent string is 40 characters.

Your browser sent the following headers:
Connection: Keep-Alive
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Encoding: gzip
Accept-Language: en-US,en;q=0.5
Host: enhanceie.com
User-Agent: CCBot/2.0 (https://commoncrawl.org/faq/)
CF-RAY: 8a82061aba5c209c-IAD
X-Forwarded-Proto: http
CF-Visitor: {"scheme":"http"}
CDN-Loop: cloudflare
CF-IPCountry: US
X-Original-URL: /ua.aspx

HTTPBrowserCapabilitiesASPNET's HTTPBrowserCapabilities object reports that, based on the User-Agent, your Browser has the following capabilities:
Type = Unknown
Name = Unknown
Version = 0.0
Major Version = 0
Minor Version = 0
Platform = Unknown
Is Beta = False
Is Crawler = False
Is AOL = False
Is Win16 = False
Is Win32 = False
Supports Frames = False
Supports Tables = False
Supports Cookies = True
Supports VBScript = False
Supports JavaScript = False
Supports Java Applets = False
Supports ActiveX Controls = False

Supports scroll-to-text-fragment? Try it ; when scroll disallowed via DocPolicy ; in a new window ; in a new noopener window (allowed XO) ; in a new window with opener allowed (blocked XO) - Purple highlight if target-text Selector is supported
chrome.exe --enable-blink-features=CSSTargetTextPseudoElement https://wpt.live/css/css-pseudo/parsing/target-text.html


Server Date/Time:Wed, 24 Jul 2024 06:58:48 GMT

Your public IP address:

getUserAgent(): ?
🔋 Battery Status: ?
estimated Storage: (null)

Compression Streams

Explainer demo

(accent-color set to red)

CSS Color rebeccapurple Test
Emoji Flags: 🇺🇳 🇺🇸 🇹🇼

Image-Formats:  Fail SVG SVGZ Fail APNG Fail:TIFF Fail:jpeg-xr Fail:jpeg-xl Fail WebP  Fail WebPanim   Fail XBM Fail HEIC Fail AVIF

URL whitespace tests

embedded space embedded \t in scheme embedded \r\n embedded \t\r\n

Content-Encoding tests

Fail Zlib-wrapped DEFLATE Fail Brotli HTTPS Brotli on HTTP (should fail) Fail zstd HTTPS zstd on HTTP


You should NOT see all of the images here.
Fail SameOrigin Fail SameSite webdbg.com SameOrigin webdbg.com SameSite


Willing to run JavaScript from text/html? Nope
Willing to run JavaScript from text/plain? Nope
Willing to run JavaScript from image/svg+xml? Nope
Willing to run JavaScript from image/gif? Nope

IFrame SrcDoc:

# Broadcast Channel demo Broadcast a message to other instances:

# Page Visibility & Lifecycle Visibility Docs DiscussionPage Lifecycle API

# Navigation/ResourceTiming

Edge gpu  !!  el  webdbg  domain  _top  Refresh loop MITM?  f  f2  view-source  microsoft-edge edge ms-availablenetworks:
# Ancient UA String Stuff

About the User-Agent String

The User-Agent (or UA) string is sent along in the headers of every HTTP request so the server knows what type of browser is making the request. For a quick refresher on the User-Agent string, check out George Shephard's article in MSDN Magazine. Two MSDN articles describe User-Agent headers: Understanding User-Agent Strings, and Best Practices for detecting the Internet Explorer version.

Want Internet Explorer to simulate another version? 

IE8+ users: Check out the free User-Agent Picker add-on, which enables changing your UA string without restarting the browser.

Otherwise, run one of the following scripts and restart all browser instances to see the change:

The following script commands will generate a text file containing all UA-override registry settings.
reg query "HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\User Agent" /s > Reg.txt
reg query "HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\User Agent" /s >> Reg.txt
reg query "HKLM\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\User Agent" /s >> Reg.txt
reg query "HKLM\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\User Agent" /s >> Reg.txt
reg query "HKCU\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\User Agent" >> Reg.txt
reg query "HKLM\Software\Microsoft\Windows\CurrentVersion\Internet Settings\User Agent" /s >> Reg.txt
reg query "HKLM\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\Internet Settings\User Agent" >> Reg.txt

See this page using different modes: X-UA-Compatible: IE=7 X-UA-Compatible: IE=8 X-UA-Compatible: IE=9 HTML5 DTD No DocType Quirks Legacy DTD Quirks

©2003-2024 Eric Lawrence