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HTTP Status Codes
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// about this tool

HTTP Status Codes Online

Updated 2026-08-19

Look up HTTP status codes online for free. Type a code — 200, 301, 404, 500, or any other — and SnapTools shows its official name, its class (1xx–5xx), and a plain-English description of what it means. Everything runs in your browser from a built-in table, so nothing is uploaded.

Status codes are the vocabulary of every API and web request, but few of us remember every one. This reference gives the exact name and meaning in a second — whether you are debugging why a request failed, deciding which code an endpoint should return, or settling a question in review. The class digit alone (4xx client, 5xx server) often points straight at the culprit.

// how to use

  1. 1 Type an HTTP status code (or part of one) into the input panel.
  2. 2 SnapTools shows the code's name, class, and meaning.
  3. 3 Copy the result, or search another code to compare.

// examples

Look up 404
Input
404
Output
404 Not Found — Client Error (4xx). The server cannot find the requested resource.
Look up 301
Input
301
Output
301 Moved Permanently — Redirection (3xx). The resource has permanently moved to a new URL.

// reference

Every common HTTP status code, what it means, and what to do about it.

Code Name Class What it means
200 OK Success The request succeeded.
201 Created Success A new resource was created — check the Location header.
204 No Content Success Succeeded with nothing to return.
301 Moved Permanently Redirect Permanent — search engines transfer ranking to the new URL.
302 Found Redirect Temporary — the original URL keeps its ranking.
304 Not Modified Redirect Your cached copy is still valid; no body is sent.
400 Bad Request Client error Malformed request — bad JSON, wrong content type.
401 Unauthorized Client error Not authenticated. You need to log in.
403 Forbidden Client error Authenticated but not allowed. Logging in again won't help.
404 Not Found Client error No resource at this URL.
405 Method Not Allowed Client error The URL exists; that HTTP verb doesn't. Check the Allow header.
409 Conflict Client error Clashes with current state — a duplicate, or a stale version.
410 Gone Client error Deliberately removed, permanently. Stronger signal than 404.
418 I'm a Teapot Client error An April Fools' joke code (RFC 2324) that stuck around.
422 Unprocessable Entity Client error Well-formed, but fails validation. Fix the data, not the format.
429 Too Many Requests Client error Rate limited. Check the Retry-After header before retrying.
500 Internal Server Error Server error An unhandled error in the application.
502 Bad Gateway Server error A proxy got an invalid reply from upstream. Check the origin.
503 Service Unavailable Server error Temporarily down — maintenance or overload.
504 Gateway Timeout Server error Upstream never replied in time. Look for a slow query.

// common uses

Quickly recalling what a status code means while debugging an API Choosing the correct code to return from an endpoint Explaining a response class during code review Learning the HTTP status code families

// faq

Is anything uploaded to a server?
No. The lookup runs entirely in your browser from a built-in table, so nothing you type leaves your machine.
What do the status code classes mean?
The first digit sets the class — 1xx informational, 2xx success, 3xx redirection, 4xx client error, and 5xx server error. Knowing the class tells you immediately who is responsible for the response.
What is the difference between 401 and 403?
401 Unauthorized means you are not authenticated — the request lacks valid credentials. 403 Forbidden means you are authenticated but not allowed to access the resource. The lookup shows each meaning clearly.
When should I use 301 vs 302?
301 Moved Permanently tells clients and search engines the move is permanent and to update their links; 302 Found signals a temporary redirect. Choosing correctly matters for SEO and caching.
Does it include less common codes?
Yes — alongside the everyday codes it covers the wider range such as 418, 429, and 451, with their standard names and classes.

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Use this via API

Get a free API key → 
curl -X POST https://thesnaptools.com/api/v1/tools/http-status-codes \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"text":"404"}'