HTTP Status Codes

Searchable status code reference

100

Continue

Initial part of request received; client should continue.

101

Switching Protocols

Server agrees to switch protocols (e.g. WebSocket upgrade).

102

Processing

Server received request but no response available yet (WebDAV).

103

Early Hints

Preload hints sent before the final response.

200

OK

Standard success response.

201

Created

Resource created; usually returns Location header.

202

Accepted

Request accepted for async processing.

204

No Content

Success with no response body.

206

Partial Content

Range request served partially.

301

Moved Permanently

Resource moved for good; update links. Cacheable.

302

Found

Temporary redirect; method may change to GET.

304

Not Modified

Cached version still valid (ETag / If-Modified-Since).

307

Temporary Redirect

Temporary redirect preserving the HTTP method.

308

Permanent Redirect

Permanent redirect preserving the HTTP method.

400

Bad Request

Malformed syntax or invalid request message.

401

Unauthorized

Authentication required or failed.

403

Forbidden

Authenticated but not allowed.

404

Not Found

Resource doesn't exist (or is hidden).

405

Method Not Allowed

HTTP method not supported on this resource.

406

Not Acceptable

No representation matching Accept headers.

408

Request Timeout

Client took too long to send the request.

409

Conflict

Request conflicts with current state (e.g. edit collision).

410

Gone

Resource permanently removed; no forwarding address.

411

Length Required

Content-Length header required.

412

Precondition Failed

Conditional headers (If-Match…) failed.

413

Payload Too Large

Body exceeds server limits.

415

Unsupported Media Type

Content-Type not supported.

418

I'm a teapot

RFC 2324 — the server refuses to brew coffee in a teapot.

422

Unprocessable Entity

Well-formed but semantically invalid (validation errors).

425

Too Early

Server unwilling to process a possibly replayed request.

429

Too Many Requests

Rate limited; check Retry-After.

451

Unavailable For Legal Reasons

Censored / legally restricted content.

500

Internal Server Error

Generic unhandled server failure.

501

Not Implemented

Server doesn't support the request method.

502

Bad Gateway

Upstream server returned an invalid response.

503

Service Unavailable

Overloaded or down for maintenance.

504

Gateway Timeout

Upstream server didn't respond in time.

507

Insufficient Storage

Server cannot store the representation (WebDAV).

511

Network Authentication Required

Captive portal — authenticate to gain access.

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About the HTTP Status Codes

Searchable reference for 40 HTTP status codes with concise, practical explanations — from 100 Continue through 418 I'm a teapot to 511 Network Authentication Required. Filter by class (1xx–5xx) or search by number, name, or keyword like “timeout” or “redirect”.

How to use

1Type a code, name, or keyword in the search box.
2Or filter by status class with the 1××–5×× buttons.

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