HTTP Header Diff
Compare request and response headers side by side
Paste two raw HTTP header blocks to spot added, removed, and changed values instantly. Great for debugging proxy issues, CDN behavior, auth differences, and staging-vs-production drift.
Left headers
Current request, response, or production headers
Right headers
New request, response, or staging headers
Added
0
Removed
0
Changed
0
Unchanged
0
Header diff
Header names are normalized case-insensitively and sorted alphabetically.
Paste HTTP headers or load the sample to start comparing.
Parsing notes
Left block
Duplicates: 0 · Invalid lines: 0
Right block
Duplicates: 0 · Invalid lines: 0
Good for
- Comparing CDN, proxy, or cache headers between environments
- Checking auth and CORS headers before and after a config change
- Reviewing request headers captured from devtools, curl, or logs