Free online tool to show and analyze HTTP server headers in real-time. View request headers sent by your browser and response headers returned by the server.
This tool displays the actual HTTP headers that your browser is sending to the server and the headers the server is sending back. Use this information to understand how your browser communicates with web servers in real-time.
Page Loaded At: 07/11/2025, 04:29:00 PM UTC
Request ID: 90kf0a
Headers sent by the browser to the server
upgrade
HTTP header
xpscommerce.com
HTTP header
*/*
HTTP header
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
HTTP header
gzip, br, zstd, deflate
HTTP header
xpscommerce.com
HTTP header
3000
HTTP header
http
HTTP header
::ffff:127.0.0.1
HTTP header
Headers sent by the server to the browser
true
Custom header indicating this response came from the headers tool
2025-07-11T16:29:00.205Z
Timestamp when the response was generated
no-cache
Indicates this page is not cached
HTTP headers are key-value pairs that are sent with every HTTP request and response. They provide essential information about the request, response, and the data being transferred. Our server headers tool shows you exactly what headers your browser is sending and receiving in real-time.
"Show server headers" refers to displaying the HTTP headers that are exchanged between your browser and a web server. This includes both request headers (sent by your browser) and response headers (sent by the server). Our tool shows these headers in real-time.
You can check HTTP headers using our free online tool. Simply visit this page and you'll see all the headers your browser is sending and receiving. You can also use browser developer tools (F12) and look at the Network tab to see headers for specific requests.
Important headers include User-Agent (browser identification), Content-Type (data format), Cache-Control (caching behavior), Set-Cookie (session management), and security headers like X-Frame-Options and Content-Security-Policy.
Due to browser security restrictions (CORS), you can only see headers from the current website. Our tool shows headers for this page. To see headers from other sites, you would need to use browser developer tools on those specific sites.
HTTP headers are crucial for web communication, security, performance, and functionality. They control caching, authentication, content negotiation, security policies, and much more. Understanding headers helps with web development, debugging, and security analysis.
Request Headers: These are sent by your browser to the web server when making a request. They provide information about the client, the request, and what the client can accept.
Response Headers: These are sent by the web server back to your browser. They provide information about the response, the server, and how the content should be handled.
Note: This tool now displays real headers from your current browser session. The headers are captured when you load this page and show the actual values being sent between your browser and the server.