HTTP Status Codes: 404, 500, 401 & Full List
Free HTTP status code reference for 404, 500, 401 unauthorized, 429 rate limit, and other 1xx–5xx responses.
How it works
Type a status code (e.g. 404) or keyword (e.g. unauthorized) to look up its meaning. Leave the search blank to browse the complete grouped reference of informational, success, redirection, client error, and server error codes.
About HTTP Status Codes
Informational only, not professional advice. Report an error.
HTTP status codes are the vocabulary of the web. Every browser request, REST API call, and webhook response returns a three-digit code that tells you whether things worked, redirected, or failed, and why.
Whether you're debugging a 502 Bad Gateway behind a load balancer, explaining a 422 validation error to a frontend teammate, or documenting your API, a fast status code reference saves time. Search by number (404) or plain English (unauthorized, timeout, teapot).
This page groups codes into informational (1xx), success (2xx), redirection (3xx), client error (4xx), and server error (5xx) so you can scan the full cheat sheet or jump straight to the code you need.
Common use cases
- Look up what HTTP status codes mean while debugging APIs and web apps. Use it as a quick cheat sheet while reading API logs or browser network panels.
- Clean up copied log lines or exported data before pasting into tickets, docs, or pull requests.
- Run a quick pass before commits when you want readable samples in README files or internal wikis.
- Continue in Unix Timestamp Converter or JSON Formatter when the next step is a different format or check.
How to use HTTP Status Codes
- Open the tool. Navigate to HTTP Status Codes on FindMeTool.
- Paste or enter input. Add the text, numbers, or dates you want to transform.
- Review output. Check the result panel. Errors usually point to the line or field that needs fixing.
- Copy or download. Copy clean output or download when the tool supports it.
- Use related tools. Follow the related links below when your workflow needs a validator, formatter, or converter next.
Examples
When to use this page
Look up what HTTP status codes mean while debugging APIs and web apps. Use it as a quick cheat sheet while reading API logs or browser network panels.
Sample input idea
Try a short snippet like: 404. Replace it with your own data before sharing output.
Quick try
Open HTTP Status Codes, paste a small sample, and confirm the output shape before processing a full export.
What HTTP Status Codes helps with
This page is the canonical home for http status codes on FindMeTool. The sections below group common search intents so you can scan by task instead of hunting through keyword lists.
Core task
Look up what HTTP status codes mean while debugging APIs and web apps. This page covers tasks such as http status codes, http status codes tool, http status codes calculator, without sending you to a separate landing URL.
Free online access
You can run http status codes online with no signup or install. Results appear in the tab so you can copy them into your editor, spreadsheet, or chat.
Privacy and local processing
When processing stays in the browser, files and pasted text do not upload to FindMeTool servers. That helps with internal screenshots, non-live API payloads, and personal photos.
Workflow and how-to
People often arrive from searches like how to http status codes, how do i http status codes, best way to http status codes. The workflow is: paste input, confirm output, then jump to a related tool if the next step is validation, formatting, or conversion.
Troubleshooting
When something looks wrong, re-check input format, try a smaller sample, and read any inline error message. The common mistakes section below lists fixes for frequent issues.
Related tasks on this page
Many visitors need 404 status code, 500 status code meaning, 401 unauthorized, 429 rate limit. Use the tool above for the primary task, then open related utilities below when the next step differs.
Quick tips
- 4xx = problem with the request; 5xx = problem on the server.
- Bookmark this page next to your JSON formatter and Unix timestamp converter.
- Use 201 Created in APIs when a POST successfully creates a resource.
Reference data maintenance
HTTP status code reference. Last verified 2026-07-19 against IANA HTTP status codes. Re-checked when official standards change, see our editorial standards.
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