HTTP Status Code Reference
Complete reference for all HTTP status codes 1xx–5xx. Searchable, filterable by category, with plain-English descriptions. 60+ codes covered.
✅ Free 🔢 60+ Codes 🔍 Searchable 📚 Reference
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HTTP Status Code Reference🔢
60+ Status Codes
Complete coverage from 100 Continue to 511 Network Auth Required.
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Instant Search
Search by code number, name or description keyword.
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Colour-coded Categories
1xx blue, 2xx green, 3xx amber, 4xx red, 5xx purple.
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Plain English
Each code has a clear, jargon-free explanation.
⭐ User Reviews
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Alex T.
Yesterday
⭐⭐⭐⭐⭐
Fast and accurate. Got the data I needed in under 3 seconds. Clean interface with no ads cluttering the results.
Network ToolsS
Sara K.
2 days ago
⭐⭐⭐⭐⭐
I use this daily for domain research. The structured output with copy buttons saves me tons of time compared to raw whois terminals.
Network ToolsD
Dan M.
1 week ago
⭐⭐⭐⭐⭐
The results are consistently accurate and the copy-per-field feature is incredibly useful for building reports.
Network ToolsL
Laura B.
2 weeks ago
⭐⭐⭐⭐⭐
Finally a tool that gives clean, readable output. The related tools panel lets me jump from one check to the next without losing my query.
Network Tools📖 How to Use
1
Browse or search
Scroll through all codes or type in the search box.
2
Filter by category
Use the dropdown to show only 2xx success or 4xx client errors.
3
Read descriptions
Plain-English explanations for every code.
4
Copy a code
Click Copy next to any code to copy "404 Not Found" format.
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❓ FAQ
What are HTTP status code categories?+
1xx (Informational): request received, processing. 2xx (Success): request was successful. 3xx (Redirection): further action needed. 4xx (Client Error): bad request from client. 5xx (Server Error): server failed to fulfil a valid request.
What is the most common HTTP error code?+
404 Not Found is the most recognised. On the server side, 500 Internal Server Error is most common. For APIs, 400 Bad Request and 401 Unauthorised are frequently seen.
What is the difference between 301 and 302?+
301 Moved Permanently tells browsers and search engines the resource has moved forever — update your links and pass SEO equity. 302 Found is a temporary redirect — keep original links and SEO value as the original URL will return.
What does 429 Too Many Requests mean?+
The client has exceeded the API rate limit. The server is asking the client to slow down. Good API clients check for 429 responses and implement exponential backoff with the Retry-After header value.
When should I use 400 vs 422?+
400 Bad Request covers general malformed requests (bad JSON, invalid syntax). 422 Unprocessable Entity (from WebDAV, now common in REST APIs) means the request was well-formed but semantically invalid — e.g. a valid JSON body with invalid field values.