HTTP Error Pages — fast testing for your handlers

Choose an HTTP 4xx or 5xx code and get a ready page with the matching response status.

HTTP status codes are standard numeric responses: 2xx for success, 3xx for redirects, 4xx for client errors, and 5xx for server errors. This website provides ready‑made SSR pages for popular codes that actually return the corresponding HTTP status. It is handy for monitoring checks, alert tuning, and automated tests.

You can directly open the desired status such as /400, /404, /500, /503, or switch to the full list on /errors. Each page includes a short description of the status and links to related codes.

All errorsHTTP 503
Tips
  • Example: open /503 and use this URL in your systems.
  • Open the /errors page
HTTP 400HTTP 401HTTP 403HTTP 404HTTP 418HTTP 429HTTP 500HTTP 502HTTP 503HTTP 504
HTTP 400HTTP 401HTTP 402HTTP 403HTTP 404HTTP 405HTTP 406HTTP 407HTTP 408HTTP 409HTTP 410HTTP 411HTTP 412HTTP 413HTTP 414HTTP 415HTTP 416HTTP 417HTTP 418HTTP 419HTTP 421HTTP 422HTTP 423HTTP 424HTTP 425HTTP 426HTTP 428HTTP 429HTTP 431HTTP 449HTTP 451HTTP 499HTTP 500HTTP 501HTTP 502HTTP 503HTTP 504HTTP 505HTTP 506HTTP 507HTTP 508HTTP 509HTTP 510HTTP 511HTTP 520HTTP 521HTTP 522HTTP 523HTTP 524HTTP 525HTTP 526

What are HTTP error pages?

HTTP status codes are standard numeric responses: 2xx for success, 3xx for redirects, 4xx for client errors, and 5xx for server errors. This website provides ready‑made SSR pages for popular codes that actually return the corresponding HTTP status. It is handy for monitoring checks, alert tuning, and automated tests.

You can directly open the desired status such as /400, /404, /500, /503, or switch to the full list on /errors. Each page includes a short description of the status and links to related codes.

Why is this useful?

Integration tests need reliable responses. These pages return a real server status code, so you can validate monitoring, firewalls, proxies and CDNs without hand‑made mocks.

Links are stable and SEO‑friendly — embed them into test scripts, documentation or verification workflows. Every page is localized and provides full metadata.

FAQ

Do these pages really return the requested HTTP status?
Yes. The server sets the corresponding HTTP response status, so external systems (monitoring, proxies, CDNs) see the correct code.
Can I use this for monitoring?
Yes. Point your monitoring check to the desired code, e.g. /503. The page will return HTTP 503 — suitable for incident drills and alert testing.