HTTP Header Parser
Paste raw HTTP headers and get a clean, explained breakdown
Raw Headers
Request or response headers
About this tool
Paste raw HTTP request or response headers and get a clean, structured breakdown with explanations for common headers like Cache-Control, CORS and security headers. HTTP Header Parser runs in the browser on DevTools. There is no signup, and your input stays on this device unless the tool explicitly performs a live network lookup.
What this tool does not do
- HTTP Header Parser is a free in-browser utility, not a hosted API. It does not keep server-side history and is not a substitute for production verification in your own stack.
How do I use this tool?
How do I use HTTP Header Parser?
Open HTTP Header Parser, enter or paste your input, and copy the result. The page works without an account.
Related guides
curl vs Postman vs Hoppscotch: Which API Tool When?
An honest comparison of the three ways developers test APIs — the terminal, the heavyweight GUI, and the open-source web app — plus how to turn any curl command into real code.
HTTP Request Headers Every Developer Should Know
A tour of the request headers you'll actually use — Authorization, Content-Type, Accept, and friends — with how to build them for curl, fetch, and raw requests.
HTTP Basic Auth vs Bearer Tokens: Which Should You Use?
A practical comparison of HTTP Basic Authentication and Bearer/JWT tokens — how each works, their trade-offs, and when to reach for which.
Related tools
API Mock Server
Define mock REST routes and intercept fetch calls client-side
Bandwidth Calculator
Estimate how long a file takes to transfer at a given connection speed — correctly handling bits vs bytes (Mbps vs MB/s) and SI vs binary size units
Broken Link Checker
Extract http(s) links from pasted HTML and check them via proxy
cURL to Code Converter
Convert cURL commands to code snippets in multiple languages. Parse cURL and generate JavaScript, Python, PHP, and more.
DNS Lookup Tool
Query DNS records and resolve domain names to IP addresses
DNS Propagation Checker
Compare DNS answers from global public resolvers and see propagation consensus instantly