HTTP Status Codes Reference
This is a fast, searchable reference for HTTP response status codes
This is a fast, searchable reference for HTTP response status codes
How to use HTTP Status Codes Reference
- Type a code number, name, or keyword into the search box.
- Click a class tile (1xx to 5xx) to filter by category if you want to browse.
- Read the plain-English meaning, and use Copy to grab any code and its description.
About HTTP Status Codes Reference
This is a fast, searchable reference for HTTP response status codes. Type a number like 404, a name like "forbidden", or a keyword like "redirect" or "rate limit", and the list filters instantly to matching codes. You can also filter by class (1xx informational, 2xx success, 3xx redirection, 4xx client error, 5xx server error) by clicking the class tiles.
Each entry shows the code, its official name, and a short plain-English explanation of what it means and when you would see it. The list covers the standard codes from RFC 9110 plus commonly used WebDAV and extension codes (such as 418, 422, 429, and 451). A Copy button next to each code copies "code name — description" so you can drop it straight into docs, tickets, or comments.
The entire reference is bundled into the page, so lookups happen instantly and privately in your browser with no network requests. It is a quick-reference tool, not a live diagnostic — it explains what a status code means, it does not fetch or test a real URL.
Frequently asked questions
- What do HTTP status codes actually mean?
- They are three-digit numbers a server returns to tell the client how a request went. The first digit sets the class: 1xx informational, 2xx success, 3xx redirection, 4xx client error, and 5xx server error. This tool gives a plain-English meaning for each specific code.
- How do I look up a specific code like 404 or 500?
- Type the number into the search box and the list filters to it instantly. You can also search by name ("not found") or by keyword ("timeout", "redirect"), or click a class tile to browse all codes in that group.
- Which codes are included?
- All standard codes defined in RFC 9110, plus widely used WebDAV codes and common extensions such as 418 (I'm a teapot), 422 Unprocessable Entity, 429 Too Many Requests, and 451 Unavailable For Legal Reasons.
- Does this tool check a real website's status code?
- No. It is a reference that explains what each code means. It does not send any request to a URL, so it will not tell you the current status of a live site. Use it to understand a code you already have from your browser, logs, or an API response.
- Is my search private?
- Yes. The whole code list ships with the page and everything runs locally in your browser. Nothing you type is sent to any server.
- What is the difference between 401 and 403?
- 401 Unauthorized means you are not authenticated — providing valid credentials may fix it. 403 Forbidden means you are recognized but not allowed to access the resource, so authenticating again will not help.