HTTP Status Code Comparisons
Use this index to jump to side-by-side HTTP code comparisons for redirects, client errors, server responses, and protocol flow choices.
3xx comparisons
4xx comparisons
- 400 vs 403
- 400 vs 404
- 400 vs 409
- 400 vs 422
- 400 vs 431
- 401 vs 403
- 401 vs 404
- 401 vs 407
- 403 vs 404
- 403 vs 405
- 404 vs 410
- 404 vs 451
- 405 vs 501
- 406 vs 415
- 408 vs 504
- 409 vs 412
- 409 vs 422
- 410 vs 301
- 411 vs 413
- 412 vs 428
- 413 vs 414
- 413 vs 431
- 415 vs 422
- 421 vs 503
- 422 vs 424
- 425 vs 429
- 426 vs 505
- 428 vs 412
- 429 vs 503
- 451 vs 403
5xx comparisons
2xx / flow comparisons
1xx comparisons
FAQ
How should I use these HTTP comparison guides?
Start with the pair that matches your implementation decision, then confirm cache, SEO, and API implications before shipping.
Are these pages only for SEO decisions?
No. They are built for server routing, API design, observability, and client behavior decisions too.