About HTTPError.net
Our Mission
HTTPError.net exists to provide developers, system administrators, and tech enthusiasts with the fastest, most accurate HTTP status code reference available. When you encounter an HTTP error, you need answers immediately—not after loading heavy JavaScript frameworks or wading through outdated documentation.
Why We Built This
While building web applications, we constantly encountered HTTP errors and found ourselves searching through multiple sources for accurate information. Existing documentation sites were either:
- Too slow, loaded with unnecessary scripts and advertisements
- Too generic, lacking platform-specific solutions
- Outdated, missing newer status codes and modern troubleshooting techniques
- Incomplete, covering only the most common errors
We built HTTPError.net to solve these problems with a focus on speed, completeness, and practical solutions.
Our Approach
Speed First
Pages are built to load quickly, even on a slow connection in the middle of an outage:
- Static HTML pages, no frameworks
- System fonts (no web font downloads)
- One small stylesheet
- JavaScript only for the homepage search (plus Google Analytics, see our privacy policy)
Platform-Specific Solutions
Generic explanations aren't enough. Where it helps, pages include configuration snippets and step-by-step fixes for specific stacks, including:
- Nginx, Apache and IIS
- PHP, Node.js / Express, Python and ASP.NET
- WordPress
- Cloudflare and AWS load balancers
Complete Coverage
We document the IANA-registered HTTP status codes you are likely to encounter, plus common unofficial codes used by major platforms, which are always labeled as non-standard. Each page includes:
- Clear, concise explanations in plain English
- Common causes and symptoms
- Fixes for both end users and developers
- Code examples where relevant
- Links to official RFC specifications
- Related status codes and resources
Based on Primary Sources
Information is compiled from official sources including:
- IANA HTTP Status Code Registry
- IETF RFC specifications, primarily RFC 9110 (HTTP Semantics)
- Official documentation from major platforms
Built for Developers
HTTPError.net is built by developers, for developers. We understand the frustration of cryptic error messages and the time pressure of production issues. Our goal is to get you from "What's this error?" to "Fixed!" as quickly as possible.
Free and Open Access
- No user accounts, paywalls or premium features
- All content freely accessible
- We use Google Analytics to understand which pages are useful; details are in our privacy policy
Found a mistake? Corrections are welcome via the contact page.
Continuous Improvement
The web evolves, and so do we. We regularly update our content to reflect:
- New HTTP status codes
- Updated platform configurations
- Modern best practices
- Community feedback and corrections
Get in Touch
Have a suggestion? Found an error? Want to contribute?