HTTP Header Visualizer
Insert HTTP Response → formatted table with explanations
HTTP/1.1 200 OKContent-TypeContentapplication/json; charset=utf-8Content type of the response. Indicates which format the answer has.
Cache-ControlCachingmax-age=3600, must-revalidateCaching directives: max-age (TTL), no-cache, no-store, public, private, must-revalidate.
Content-EncodingContentgzipCompression format of the body (gzip, br, deflate, identity).
Strict-Transport-SecuritySicherheitmax-age=31536000; includeSubDomainsHSTS: Enforces HTTPS for max-age seconds. includeSubDomains and preload possible.
X-Content-Type-OptionsSicherheitnosniffnosniff: Verhindert MIME-Type-Sniffing im Browser.
X-Frame-OptionsSicherheitDENYDENY: No embedding as frame. SAMEORIGIN: Only own domain. Protection against Clickjacking.
Content-Security-PolicySicherheitdefault-src 'self'CSP: Determines allowed sources for scripts, styles, images etc. Protection against XSS.
X-Request-IdInfoabc123-def456Unique ID for the request for tracking and debugging purposes.
ServerInfonginx/1.25.0Server software. Security note: Recommended to avoid (Information Disclosure).
DateInfoMon, 01 Jan 2024 12:00:00 GMTResponse timestamp in HTTP date format.
Analyze HTTP Headers Effortlessly
The HTTP Header Visualizer simplifies the analysis of raw server responses by converting complex strings into a structured, readable table. By pasting an HTTP response, the tool automatically identifies and explains key components such as content type, compression formats, and caching directives. This visualization helps you quickly understand how a server communicates with the browser, making it easier to identify specific configurations without having to manually decode technical headers or search for definitions.
Practical Use Cases for Developers
This tool is an essential resource for web developers and system administrators who need to audit site performance and security. It allows you to quickly verify Cache-Control settings, check HSTS enforcement, and inspect Content Security Policy rules. By providing clear insights into headers like ETag, Last-Modified, and Referrer-Policy, the visualizer helps ensure that your server is correctly delivering content while protecting against common vulnerabilities such as clickjacking or cross-site scripting.
Privacy-First Browser Processing
Your privacy is protected because all data processing occurs directly within your browser. When you paste an HTTP response, the information is parsed locally on your device rather than being sent to a remote server or stored in any database. This ensures that sensitive headers and internal configurations remain private while you analyze the technical details of any URL's response, providing a secure environment for debugging and development tasks.
Frequently asked questions
What specific header information can I see?
The tool displays essential data including Content-Type, Content-Length, and compression formats like gzip or br. It also highlights critical directives for caching (max-age), security policies (HSTS, CSP), and resource identification tags like ETag to help you understand the full scope of the server's response.
How does this tool assist with web security?
The visualizer highlights critical security headers such as X-Frame-Options, Content Security Policy (CSP), and HSTS. These are vital for preventing clickjacking and cross-site scripting attacks. By making these headers easy to read, the tool helps you quickly verify if your website's security configurations are correctly implemented.
Is my data safe when using this tool?
Yes, your data remains secure because all processing is performed locally in your browser. The raw HTTP response you paste is analyzed on-site without being sent to a remote server or stored. This ensures that any sensitive information within the headers stays private and is only visible during your current session.