API Error Decoder: A Tool for Making Sense of HTTP Errors
If you’ve ever stared at a 422 Unprocessable Entity with a vague JSON response, you know how frustrating debugging API errors can be. You’re not alone. That’s why I built API Error Decoder — a simple, no-login tool that helps developers interpret and resolve HTTP error responses faster.
You paste an error — whether it’s a status code, response body, or full cURL command — and the tool breaks it down: what the status means, common causes, and actionable steps to fix it. It supports all standard HTTP status codes and includes context-aware suggestions based on the response structure. For example, if you’re getting a 400 with a nested validation error, it’ll highlight which field failed and why.
It’s not magic — just practical guidance pulled from real debugging patterns. I built it after spending too many hours parsing unclear API docs and error messages myself.
The tool is free to use for basic decoding. No account needed. Just go to https://tool-api-error-decoder-4djm1ba2s-orbitboyzz-4697s-projects.vercel.app and start pasting.
There’s also a Pro tier ($9/month) that adds:
- Syntax-aware parsing for cURL, fetch, and Axios snippets
- Exportable debugging notes
- Priority support for error explanations (e.g., if you’re working with a niche API)
I kept the pricing low because I want this to be accessible. No enterprise tiers, no team plans — just a straightforward option if you find it useful enough to support.
Feedback? I’m @orbitboyzz on Twitter (X), or just reply here. I’ll keep improving it based on what devs actually need when they’re stuck.
Check it out: API Error Decoder
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