HTTP Status Code Lookup
Developer utilities: formatters, validators, encoders, and testers.
What does this tool do?
Look up any HTTP status code instantly and generate copy-paste security headers. Search the full 1xx-5xx directory for meanings, then tick the headers you need to get Nginx and Apache configs.
Key features
- Syntax validation
- Format & minify
- Error highlighting
- Copy formatted output
Look up any HTTP status code instantly and generate copy-paste security headers. Search the full 1xx-5xx directory for meanings, then tick the headers you need to get Nginx and Apache configs.
Status Code Directory
Results
Security Header Generator
Nginx
Apache (.htaccess)
How to Use
- Type a code (404) or keyword (forbidden) in the search box, or filter by 1xx-5xx class.
- Click any code card to read its full meaning.
- Tick the security headers you want and copy the generated Nginx or Apache config.
Core Features
- Searchable directory of 40+ HTTP status codes with plain-English meanings
- One-click category filters: informational, success, redirect, client and server errors
- Security header generator for Nginx and Apache (CSP, HSTS, X-Frame-Options and more)
- 100% client-side reference - free forever
Frequently Asked Questions
What is the difference between 301 and 302?
A 301 is a permanent move: browsers and search engines update their records. A 302 is temporary: the original URL keeps its ranking and bookmarks stay valid.
Which security headers should every site have?
At minimum: Content-Security-Policy (blocks XSS), Strict-Transport-Security (forces HTTPS), X-Frame-Options (blocks clickjacking) and X-Content-Type-Options (blocks MIME sniffing).
How to Use HTTP Status Code Lookup
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