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HTTP Headers

Browser Headers

View and analyze all HTTP headers your browser sends to the server in real-time

Your Browser Headers
Below are the HTTP headers your browser is sending to the server in real-time.
Header Name
Value
accept
text/html
application/xhtml+xml
application/xml;q=0.9
*/*;q=0.8
accept-encoding
br
gzip
accept-language
en-US
en;q=0.5
host
renifler.io
if-modified-since
Thu
14 Aug 2025 02:11:50 GMT
user-agent
CCBot/2.0 (https://commoncrawl.org/faq/)
x-forwarded-for
10.42.2.1
x-forwarded-host
renifler.io
x-forwarded-port
443
x-forwarded-proto
https
x-forwarded-server
traefik-76c9d68fb5-26t5z
x-real-ip
10.42.2.1
Showing 12 of 12 headers
What Are Browser Headers?

Browser headers are pieces of metadata sent in HTTP requests that provide information about the user's browser, device, and connection settings. They help servers understand how to process requests and customize responses.

User-Agent
Accept-Language
Referer
Cookie
How to Check Headers
  1. 1Open Developer Tools (F12 on most browsers).
  2. 2Go to the Network tab.
  3. 3Click on a request and select Headers to view HTTP headers.

Frequently Asked Questions

What are the most important browser headers?

The most important browser headers include User-Agent (identifies browser and OS), Accept-Language (preferred languages), Referer (previous page URL), and Cookie (stored session data).

Can websites track me using headers?

Yes, HTTP headers can contribute to browser fingerprinting. Your unique combination of headers may help identify your browser across different websites, even without cookies.