Paste raw request or response headers and format them into a readable block. Detect invalid lines, duplicate headers, and missing security headers for easier API and network debugging.
This tool produces a cleaned or analyzed result for HTTP Header Formatter. The result card shows the main output, issue counts, practical interpretation, and a quality score from 0 to 100.
The output is generated locally in your browser. Review production configuration files or academic submissions before final use.
Use the sample button to load a realistic example for HTTP Header Formatter, then change options to see how the output and score respond.
Processing is rule-based and designed for transparent formatting, counting, sorting, removal, and quality scoring. It does not send your text to a server.
For strict production formats, verify the final output with your runtime, linter, validator, or assignment requirements.
Paste request or response headers and run the formatter to normalize each name-value line.
Common recommendations include Content-Security-Policy, Strict-Transport-Security, X-Frame-Options, and X-Content-Type-Options.
Content-Security-Policy helps restrict which scripts, styles, images, and other resources a page can load.
Duplicates can be valid in some cases, but unexpected duplicates may cause ambiguous behavior in clients or proxies.
Check that each header has a valid name, a colon, and a value, then review duplicates and security coverage.
| Module | Purpose |
|---|---|
| Input parser | Reads pasted text and uploaded files. |
| Processor | Applies selected formatting, cleanup, sorting, removal, or counting logic. |
| Quality score | Scores readability, completeness, structure, or safety indicators. |
| Export | Provides TXT, CSV, and JSON downloads. |