Launching today
JsonFixer
Fix malformed JSON from LLMs, APIs, and config files.
2 followers
Fix malformed JSON from LLMs, APIs, and config files.
2 followers
JsonFixer is a free AI-powered JSON repair workspace. Paste broken JSON — from LLM outputs, API responses, or config files — and a four-stage self-healing engine (WASM → jsonrepair → AI) fixes it in under 200 ms. REST API available.
Hey PH! I'm Dechefini, the architect of JsonFixer.
This started when I kept losing 20 minutes per sprint dealing with malformed JSON from ChatGPT, Claude, and API responses. JSON.parse would throw, I'd stare at a 2,000-character blob, and manually hunt for the offending character. After the tenth time I thought: there has to be a better way.
JsonFixer runs broken JSON through a four-stage self-healing pipeline:
WASM heuristics — catches 90% of cases in ~5 ms, entirely in-browser
jsonrepair — handles structural issues like trailing commas and Python literals
AI — for ambiguous or severely mangled LLM output
AI retry — last resort with recursive strategy
Stages 1–2 run entirely in your browser. Zero data leaves your machine unless you explicitly request AI repair — and there's a Local-Only mode toggle to prevent that entirely.
There's also a REST API, npm SDK (npm install jsonfixer), schema conversion to TypeScript/Zod/Pydantic/Go, and repair history.
Free forever for the web tool. Would love to hear how you're using it!
— Dechefini
If you’ve ever copied JSON from ChatGPT, pasted it into your codebase, and spent 15 minutes hunting a missing quote… that’s exactly the problem this fixes.
Curious if people are seeing more issues from API payloads lately or mostly LLM output?