HTTP Header Viewer
Parse raw HTTP headers into a cleaner key-value list for faster debugging.
Raw headers
Paste header lines from devtools, logs, or an API client.
Parsed headers
Invalid lines are marked so you can clean them up quickly.
Common use cases
- Cleaning copied header blocks from devtools
- Reviewing auth, cache, or content headers quickly
- Sharing readable header lists with teammates
FAQ
Does this send headers to a server?
No. Parsing happens locally in the browser, which is helpful when the header block contains sensitive details.
Can it spot malformed lines?
Yes. Lines without a standard colon separator are marked so you can clean them up more quickly.
How it works
Paste header blocks from browser tools, logs, or API clients and turn them into a readable list with validity hints. The result is produced immediately so you can review it before copying or using it elsewhere.
Privacy
The tool is designed to process ordinary input in your browser. Avoid pasting passwords, private keys, access tokens, personal records, or other sensitive production data into any online utility.
Limitations
This utility handles the focused workflow described on this page. Check the result before production use, especially when an input depends on a vendor-specific format, security rule, or external standard.