About this tool
Parse raw HTTP headers into structured JSON. Turn opaque strings from network traces, devtools, or SEO audits into structured output you can act on.
Paste a raw HTTP header block (one Header-Name: value per line). Parse to see a structured JSON object of header names and values. Example — JSON API response headers: try `Content-Type: application/json Authorization: Bearer tok_abc` and expect something like `{ "Content-Type": "application/json", "Authorization": "Bearer tok_abc" }`.
Does not perform a live HTTP request — you must paste headers yourself. See also: Cookie Parser, curl Command Generator, and URL Parser. Runs in your browser — nothing you paste gets uploaded.
How to use
- Paste a raw HTTP header block (one Header-Name: value per line).
- Parse to see a structured JSON object of header names and values.
- Check for duplicates, typos, or unexpected Content-Type values.
- Copy individual fields when debugging proxies, CORS, or auth middleware.
Example
JSON API response headers
Input
Content-Type: application/json Authorization: Bearer tok_abc
Output
{
"Content-Type": "application/json",
"Authorization": "Bearer tok_abc"
}Limitations
- Does not perform a live HTTP request — you must paste headers yourself.
- Folded/legacy multi-line header continuations are not fully supported.
- Set-Cookie parsing is shallow; use the Cookie Parser for cookie strings.
Related guides
1Related tools
3Frequently asked questions
What does the HTTP Header Parser do?
Parse raw HTTP headers into structured JSON. Runs in your browser — no install, no account.
How do I use the HTTP Header Parser?
Paste a raw HTTP header block (one Header-Name: value per line). Parse to see a structured JSON object of header names and values. Check for duplicates, typos, or unexpected Content-Type values. Copy individual fields when debugging proxies, CORS, or auth middleware.
Is the HTTP Header Parser free?
Yes. No signup, no usage limits, no paywall.
Does the HTTP Header Parser upload my data?
No. Processing happens locally in JavaScript. Your input is not uploaded, stored, or logged.
What are the limitations of the HTTP Header Parser?
Does not perform a live HTTP request — you must paste headers yourself. Folded/legacy multi-line header continuations are not fully supported. Set-Cookie parsing is shallow; use the Cookie Parser for cookie strings.