HTTP Status Code Lookup – Free Online Tool
Look up HTTP status codes with plain-English meanings, API guidance, SEO notes, retry rules, cache tips, headers, and copy-ready response examples.
Free HTTP Status Code Lookup for Developers and SEO
ToolsMint HTTP Status Code Lookup helps you understand HTTP response codes quickly. Search by number, phrase, header, or practical use case, then review what the code means for APIs, redirects, retries, caching, and technical SEO.
API Response Planner With Copy-Ready Examples
A status code table is useful, but real teams also need the right headers and response shape. This tool suggests Location, Retry-After, Allow, ETag, Cache-Control, request ID, and problem JSON examples where they fit common API workflows.
Retry, Cache, and Rate Limit Guidance
Use the response planner to decide when clients should retry, when to avoid repeating non-idempotent requests, when to use Retry-After for 429 or 503, and when cache headers can safely help browsers, CDNs, and crawlers.
SEO Notes for 301, 302, 404, 410, 500, and 503
Status codes affect how search engines understand pages during migrations, deletions, outages, and errors. The lookup explains when to use permanent redirects, temporary redirects, not found, gone, service unavailable, and successful 200 responses.
Private Browser-Only HTTP Reference
Search, filtering, scenario selection, copy actions, response examples, and JSON report downloads run locally in your browser. No URLs, API designs, error messages, or debugging notes are uploaded to ToolsMint.
Frequently Asked Questions
Everything you need to know about the HTTP Status Code Lookup.
Is this HTTP status code lookup free?
Yes. It is free to use with no signup, no account, and no usage limit.
Does this tool fetch my URL?
No. It is a private reference and response planner, not a live URL fetcher. That avoids CORS surprises and keeps your debugging notes local.
What is the difference between 404 and 410?
Use 404 when a resource is not found or its permanence is unknown. Use 410 when the resource is intentionally gone and is not expected to return.
Should I use 301 or 302 for redirects?
Use 301 for permanent moves and 302 for temporary moves. For APIs where the HTTP method must be preserved, review 307 and 308.
When should I include Retry-After?
Retry-After is useful for 429 Too Many Requests and 503 Service Unavailable when clients should wait before trying again.
Can I copy response examples?
Yes. The tool includes copy-ready status lines, suggested headers, JSON examples, summaries, and downloadable JSON reports.