HTTP Headers Parser
Parse and format HTTP headers instantly with this free online HTTP Headers Parser.
Parsed Output
Understanding HTTP Headers
HTTP headers carry important information between browsers, servers, APIs, CDNs, proxies, and web applications. They help describe how a request or response should be handled, including content type, authentication, caching, compression, cookies, CORS rules, and more.
When debugging APIs or web requests, raw headers can become difficult to inspect manually. This parser converts plain HTTP header text into structured JSON so the values are easier to read, copy, compare, and use during development.
How to Use the HTTP Headers Parser
- Paste raw HTTP request or response headers.
- Click Parse Headers.
- View the structured JSON output.
- Copy the parsed result for debugging or documentation.
Common Use Cases
- Parsing API request and response headers.
- Checking caching, CORS, authentication, and content-type headers.
- Debugging Authorization, Cookie, and Set-Cookie values.
- Formatting raw networking data into readable JSON.
- Inspecting headers copied from browser DevTools or API clients.
Example HTTP Headers
Raw headers:
Content-Type: application/json Authorization: Bearer eyJhbGciOi... Cache-Control: no-cache X-Forwarded-For: 192.168.1.10
Parsed output:
{
"Content-Type": "application/json",
"Authorization": "Bearer eyJhbGciOi...",
"Cache-Control": "no-cache",
"X-Forwarded-For": "192.168.1.10"
}Frequently Asked Questions
What are HTTP headers?
HTTP headers are key-value pairs sent with web requests and responses. They describe information such as content type, authentication, caching, cookies, compression, and browser behavior.
Why do developers inspect HTTP headers?
Developers inspect headers to debug API requests, authentication issues, CORS problems, caching behavior, redirects, cookies, and server responses.
Can this tool parse headers copied from DevTools?
Yes. You can paste raw request or response headers copied from browser DevTools, API clients, server logs, or debugging tools.
Is header parsing processed on the server?
No. HTTP header parsing happens directly inside your browser.
Related Tools
Working with HTTP headers often also involves checking response codes, cookies, CORS configuration, browser requests, and API debugging workflows.