pastefix
BlogAbout

Error Message Decoder

Error Message / Stack Trace
Explanation
!
Paste an error to get started
Works with any language or framework

How to use

Paste any error message, stack trace, or HTTP status code into the input area. Pastefix instantly recognizes common error types — JavaScript errors (TypeError, ReferenceError, SyntaxError), Node.js error codes (ENOENT, ECONNREFUSED), and HTTP status codes (404, 500, 502) — and provides a quick explanation. Click "Explain with AI" for a detailed breakdown with step-by-step fix suggestions tailored to your specific error.

What this tool does

Pastefix's Error Decoder identifies the type and cause of any error message you paste. It provides an instant client-side explanation for recognized errors, and uses AI to analyze unfamiliar or complex stack traces. The AI explains what went wrong, why it happened, and exactly how to fix it — in plain English, not jargon.

Common use cases

  • Understanding cryptic error messages from unfamiliar frameworks or libraries
  • Quickly looking up HTTP status codes and their meanings during API debugging
  • Decoding Node.js system error codes (EACCES, EADDRINUSE, ETIMEDOUT)
  • Getting fix suggestions for JavaScript runtime errors with full context
  • Onboarding new team members who encounter unfamiliar stack traces

Frequently Asked Questions

What languages and frameworks are supported?

Pastefix works with errors from any language or framework — JavaScript, Python, Java, Go, Rust, Ruby, PHP, and more. The instant decoder recognizes common JS/Node.js patterns, and the AI analysis handles errors from any technology stack.

Is my error data kept private?

Yes. The instant error recognition happens in your browser with no network requests. Only clicking "Explain with AI" sends the error text to a server for analysis. We do not log or store your input.

Can I paste an entire stack trace?

Absolutely. Pastefix handles multi-line stack traces up to 10,000 characters. The AI analysis works best with the full stack trace, as it uses the call chain and file paths to provide more accurate fix suggestions.

How is this different from searching the error on Google?

Pastefix analyzes your specific error in context — not just the error type, but the exact message, affected variables, and stack trace. You get a targeted explanation and fix instead of sifting through generic forum answers.