HTTP header parser
Inspect pasted HTTP headers while preserving repeated field values.
Result
Enter your values. Your result will appear here.
How it works
- Inspect the example or enter your own input.
- Check the units and operation, then run the tool.
- Review the result, then copy or download it. Keep a copy of your original data.
Example & practical use
Starting example: Input: HTTP/1.1 200 OK Content-Type: application/json Cache-Control: max-age=3600 Set-Cookie: a=1 Set-Cookie: b=2
Limits and help
No request is sent. Obsolete folded headers and invalid field names are rejected. Do not share cookies or authorization headers. Runs on your device without uploading input. Maximum 200,000 characters per field; numeric calculations use finite JavaScript numbers unless exact integer/decimal arithmetic is stated.
Your files are yours.
Image and text processing happens in your browser. Your files are not uploaded to our servers.
Troubleshooting
Try the small example on this page first. If it works, check your input format and size limit. Save any needed input before reloading. You do not need to share a file or password to report an issue.