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HTTP Status Code Lookup

Look up HTTP status codes and meanings fast to troubleshoot API responses and integration issues.

HTTP Status Code Lookup

Search by code, name, or behavior to quickly map API responses to likely causes.

1xx Informational

Code	Name	Summary
100	Continue	Initial part of request received; client should continue.
101	Switching Protocols	Server is switching protocols as requested.
102	Processing	Server has accepted and is processing the request.
103	Early Hints	Server sends preliminary headers before final response.

2xx Success

Code	Name	Summary
200	OK	Request succeeded.
201	Created	Request succeeded and a resource was created.
202	Accepted	Request accepted for processing, not completed yet.
203	Non-Authoritative Information	Returned metadata may come from another source.
204	No Content	Request succeeded with no response body.
205	Reset Content	Client should reset the view.
206	Partial Content	Server is returning part of the resource.
207	Multi-Status	Conveys information for multiple resources.
208	Already Reported	Members of DAV binding already reported.
226	IM Used	Server fulfilled request using instance manipulations.

3xx Redirection

Code	Name	Summary
300	Multiple Choices	Request has multiple possible responses.
301	Moved Permanently	Resource has permanently moved to a new URL.
302	Found	Resource is temporarily located at a different URL.
303	See Other	Client should fetch resource with GET at another URI.
304	Not Modified	Cached version is still valid.
305	Use Proxy	Requested resource must be accessed through proxy.
307	Temporary Redirect	Temporary redirect with same method semantics.
308	Permanent Redirect	Permanent redirect with same method semantics.

4xx Client Error

Code	Name	Summary
400	Bad Request	Server could not understand malformed request.
401	Unauthorized	Authentication is required or failed.
402	Payment Required	Reserved for future use.
403	Forbidden	Server understands request but refuses to authorize.
404	Not Found	Requested resource could not be found.
405	Method Not Allowed	HTTP method is not allowed for this resource.
406	Not Acceptable	No representation matches acceptable criteria.
407	Proxy Authentication Required	Proxy requires authentication.
408	Request Timeout	Server timed out waiting for request.
409	Conflict	Request conflicts with current resource state.
410	Gone	Resource no longer exists and will not return.
411	Length Required	Server requires Content-Length header.
412	Precondition Failed	One or more request preconditions failed.
413	Payload Too Large	Request entity is larger than server is willing to process.
414	URI Too Long	Request URI is longer than server can interpret.
415	Unsupported Media Type	Payload format is not supported.
416	Range Not Satisfiable	Requested byte range cannot be fulfilled.
417	Expectation Failed	Server cannot meet Expect header requirements.
418	I'm a Teapot	RFC joke code indicating refusal to brew coffee.
421	Misdirected Request	Request was directed at a server unable to respond.
422	Unprocessable Entity	Request understood but semantic validation failed.
423	Locked	Resource is locked.
424	Failed Dependency	Request failed due to previous request failure.
425	Too Early	Server unwilling to process replay-prone request.
426	Upgrade Required	Client should switch to a different protocol.
428	Precondition Required	Server requires conditional request.
429	Too Many Requests	Rate limit exceeded.
431	Request Header Fields Too Large	Header fields are too large.
451	Unavailable For Legal Reasons	Resource blocked for legal reasons.

5xx Server Error

Code	Name	Summary
500	Internal Server Error	Server encountered an unexpected condition.
501	Not Implemented	Server does not support requested functionality.
502	Bad Gateway	Gateway/proxy got invalid response from upstream.
503	Service Unavailable	Server is unavailable or overloaded.
504	Gateway Timeout	Gateway/proxy timed out waiting for upstream.
505	HTTP Version Not Supported	HTTP version is not supported.
506	Variant Also Negotiates	Configuration issue in transparent content negotiation.
507	Insufficient Storage	Server cannot store representation needed to complete request.
508	Loop Detected	Server detected an infinite loop while processing request.
510	Not Extended	Further extensions required for request fulfillment.
511	Network Authentication Required	Client must authenticate to gain network access.

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How to Use the HTTP Status Code Lookup

1
Enter your values
Open the HTTP Status Code Lookup and fill in the required input fields with your numbers or selections.
2
Review the calculation
The tool automatically computes the result as you type. Double-check your inputs to ensure accuracy.
3
Interpret your results
Review the calculated output along with any breakdowns, charts, or explanations provided to understand what the numbers mean for your situation.

Sources & Verification

MDN Web Docs ECMAScript Language Specification

Published by ConvertCrunch Editorial Team | Our Methodology

Frequently Asked Questions

What is the HTTP Status Code Lookup?

The HTTP Status Code Lookup is a free browser-based tool on ConvertCrunch. Look up HTTP status codes and meanings fast to troubleshoot API responses and integration issues. It requires no downloads, installations, or account signups. Simply enter your values and get instant, accurate results. The tool is designed for quick calculations and informed decision-making, whether you are a professional, student, or everyday user looking for reliable answers.

How do I use the HTTP Status Code Lookup?

Using the HTTP Status Code Lookup is straightforward. Enter your values into the input fields provided on the page, then calculate or adjust parameters to explore scenarios. Most processing happens locally in your browser. If a feature uses a third-party service, the tool identifies that connection and the privacy policy explains it. Most users get the answers they need in under a minute.

Is the HTTP Status Code Lookup free to use?

Yes, the HTTP Status Code Lookup is completely free to use with no account signup, email requirement, or premium tier. Most calculations run locally in your browser. Features that depend on live data or a third-party service require a network connection and are identified in the tool. You can use it as many times as you need for personal, educational, or professional purposes.

How accurate is the HTTP Status Code Lookup?

The HTTP Status Code Lookup uses standard algorithms, encoding specifications, and well-tested implementations. Output is deterministic and verifiable against official specifications. For encoding, hashing, and conversion tools, results match the relevant RFC or standard exactly. For estimation tools, results are based on industry benchmarks and may vary based on your specific environment and configuration.

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