Ad Slot

HTTP Status Codes

Look up HTTP status codes and their meanings.

Ad Slot

200

Request succeeded.

201

Created

Resource successfully created.

204

No Content

Success but no content to return.

301

Moved Permanently

Resource permanently moved to new URL.

302

Found

Resource temporarily at different URL.

304

Not Modified

Cached version is still valid.

400

Bad Request

Server cannot process the request due to client error.

401

Unauthorized

Authentication is required.

403

Forbidden

Server refuses to authorize the request.

404

Not Found

Resource not found on the server.

405

Method Not Allowed

HTTP method not allowed for this endpoint.

408

Request Timeout

Server timed out waiting for request.

409

Conflict

Request conflicts with current resource state.

422

Unprocessable Entity

Request well-formed but semantically incorrect.

429

Too Many Requests

Rate limit exceeded.

500

Internal Server Error

Generic server error.

502

Bad Gateway

Invalid response from upstream server.

503

Service Unavailable

Server temporarily unavailable.

504

Gateway Timeout

Upstream server timed out.

Ad Slot

Frequently asked questions

Does this list every HTTP status code?

No — it's a curated set of the roughly 18 codes you'll actually run into day to day (200, 301, 404, 500, and similar), not the full IANA registry. Less common codes like 226 or 451 aren't included.

How does the search box match codes?

By simple substring — typing "404" or "not found" both surface the same entry, since it checks your query against both the numeric code and the status text, case-insensitively.

What do the 2xx/3xx/4xx/5xx buttons do?

They filter the list down to just success, redirection, client error, or server error codes, based on the first digit of the status code.

Ad Slot

Related tools

JSON Formatter

Format, validate, and beautify JSON with syntax highlighting.

Base64 Encoder / Decoder

Encode and decode Base64 strings instantly.

URL Encoder / Decoder

Encode or decode URL/percent-encoded strings.

HTML Encoder / Decoder

Convert special characters to HTML entities and back.

Ad Slot