@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: www.enhanceie.com
If-Modified-Since: Sat, 20 Apr 2019 08:12:27 GMT
User-Agent: CCBot/2.0 (https://commoncrawl.org/faq/)
CF-IPCountry: US
CF-RAY: 4ed319416cc3c1e8-IAD
X-Forwarded-Proto: http
CF-Visitor: {"scheme":"http"}
CDN-Loop: cloudflare
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


Server Date/Time:Wed, 26 Jun 2019 23:53:05 GMT

Your public IP address:

getUserAgent(): ?
Battery level: ?

CSS Color rebeccapurple Test

Image-Formats:  Fail SVG SVGZ Fail APNG Fail:TIFF Fail:jpeg-xr Fail WebP  Fail WebPanim   Fail XBM Fail HEIC
Content-Encoding:  Fail Zlib-wrapped DEFLATE Fail Brotli HTTPS Brotli on HTTP (should fail)


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:

Edge gpu  !!  el  webdbg  domain  _top  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
©2003-2019 Eric Lawrence