About this tool
Look up HTTP status codes and their meanings. Reproduce requests, look up status codes, and configure cross-origin headers for local dev.
Type a numeric status code such as 404 or 503. Read the canonical reason phrase for that code. Example — Not Found: try `404` and expect something like `404 Not Found`.
Covers common codes — obscure or vendor-specific statuses may be missing. See also: CORS Header Generator. Runs in your browser — nothing you paste gets uploaded.
How to use
- Type a numeric status code such as 404 or 503.
- Read the canonical reason phrase for that code.
- Leave the field empty or enter an unknown code to browse the built-in list.
- Use the phrase in API docs, error pages, or support macros.
Example
Not Found
Input
404
Output
404 Not Found
Limitations
- Covers common codes — obscure or vendor-specific statuses may be missing.
- Does not explain framework-specific error body shapes (Problem Details, GraphQL errors).
- Lookup is informational; it cannot change how your server responds.
Related tools
1Frequently asked questions
What does the HTTP Status Code Lookup do?
Look up HTTP status codes and their meanings. Runs in your browser — no install, no account.
How do I use the HTTP Status Code Lookup?
Type a numeric status code such as 404 or 503. Read the canonical reason phrase for that code. Leave the field empty or enter an unknown code to browse the built-in list. Use the phrase in API docs, error pages, or support macros.
Is the HTTP Status Code Lookup free?
Yes. No signup, no usage limits, no paywall.
Does the HTTP Status Code Lookup upload my data?
No. Processing happens locally in JavaScript. Your input is not uploaded, stored, or logged.
What are the limitations of the HTTP Status Code Lookup?
Covers common codes — obscure or vendor-specific statuses may be missing. Does not explain framework-specific error body shapes (Problem Details, GraphQL errors). Lookup is informational; it cannot change how your server responds.