HTTP Status Code Lookup

Look up any HTTP status code and what it means, from 200 to 503 — free reference tool.

About

About the HTTP Status Code Lookup

Looks up what any HTTP status code means and its category, or lets you search the full list by number, name or category.

Backend developers use it to double-check what a status code they're about to return actually implies, while frontend developers and QA engineers use it to look up an unfamiliar code they saw in a network request. It's one of many free developer tools on Toolapt, and like every tool here, it's free to use with no sign-up and no limit on how many times you run it.

Choose what to view about this tool

Guide

Using the HTTP Status Code Lookup

  1. 1

    Step 1

    Type a status code into the Status code field to see its meaning and category instantly.

  2. 2

    Step 2

    Or type a keyword — like timeout, redirect or teapot — into Search all codes.

  3. 3

    Step 3

    Read the matching rows in the table below the search box.

  4. 4

    Step 4

    Change either field any time; both update live as you type.

  • Looks up any status code from 100 to 599 and shows its name and category
  • Categorizes codes as Informational, Success, Redirection, Client error or Server error
  • Searches the full list of known codes by number, name or category keyword
  • Updates live as you type, with no button to click
  • Covers the standard IANA-registered status codes, including the playful 418 I'm a Teapot
  • Works entirely in your browser — nothing you type is sent to a server
  • Free to use, with no sign-up and no limit on how many times you run it

Backend developers

Backend developers use the HTTP Status Code Lookup for double-checking a code's exact meaning before returning it from an API.

Frontend developers

Frontend developers use the HTTP Status Code Lookup for understanding an unfamiliar status code they spotted in the browser's network tab.

QA engineers

QA engineers use the HTTP Status Code Lookup for confirming a test assertion is checking for the right status code and category.

Students learning HTTP

Students learning HTTP use the HTTP Status Code Lookup for browsing the full list and understanding how codes are grouped into categories.

Examples

HTTP Status Code Lookup examples

3 worked examples

01

Common not-found code

Type 404 into Status code to see "404 Not Found", categorized as Client error (4xx).

02

Search by keyword

Type "teapot" into Search all codes to find "418 I'm a Teapot", categorized as Client error (4xx).

03

A redirect code

Type 301 into Status code to see "301 Moved Permanently", categorized as Redirection (3xx).

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FAQ

Frequently asked questions

Quick answers to common questions about the HTTP Status Code Lookup.

What does the HTTP Status Code Lookup do?

It shows what a given HTTP status code means and its category, and lets you search the full list by number, name or category.

Is the HTTP Status Code Lookup free to use?

Yes. It's free, with no sign-up, no watermark and no limit on how many times you use it.

Is my input safe when I use this tool?

Yes. Lookups run entirely on your own device against a built-in list — nothing you type is sent to a server.

What are the five status code categories?

1xx Informational, 2xx Success, 3xx Redirection, 4xx Client error, and 5xx Server error — the code's first digit determines its category.

What happens if I enter a code that isn't in the list?

The tool still shows its category based on the first digit, and marks the code as "(unregistered)" since it isn't one of the standard, named codes.

Can I search by name instead of number?

Yes. The search box matches against the code number, its name, and its category, so searching "timeout" or "redirect" works just as well as searching a number.

Can I use this tool on my phone?

Yes. The page is fully responsive and works on mobile, tablet and desktop browsers alike.

Does this tool have any limitations?

It covers the standard IANA-registered HTTP status codes; a nonstandard code used by a specific vendor or framework may not appear by name.

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