UUUP Tools

Developer Tools

HTTP Status Code Reference and Troubleshooting

Search HTTP status codes from 100 to 511 with plain-language meanings, typical causes, and fix hints. Filter by class and copy individual cards locally.

Quick switch→cURL to Fetch
DeveloperNetworkReference
Quick switch:cURL to Fetch

Favorite this tool

No favorite storage mode has been selected.

Quick actions

Back to Developer Tools Browse all tools

Copy this tool URL or open the system share sheet on a supported device.

Use cases

  • Decide whether an API should return 401 vs 403
  • Explain gateway errors during incident response

How to use

  1. Search by code, English phrase, or keyword
  2. Filter 1xx–5xx classes
  3. Copy any status card you need

Example input and output

Status

403

Meaning

Forbidden — authenticated but not allowed

FAQ

Is the list complete?

It covers common IETF codes including practical ones like 418 and 451.

Tools

Related tools

Continue with another translated tool for a nearby task.

cURL to Fetch

cURL to JavaScript Fetch Converter

Available

Convert cURL commands into JavaScript fetch code. Parses -X, -H, and --data-raw into method, headers, and body, with optional async/await wrapping.

cURL HTTP Developer
Open tool