We built the JSON repair tool we couldn't find on Reddit

Hey Product Hunt!

I built JsonFixer.ai because I got tired of my LLM agents breaking my production runs at 2 AM. I spent way too much time on Reddit and Google looking for a tool that didn't just point out errors, but actually fixed the "slop" ChatGPT and Claude tend to spit out.

Since I couldn't find it, I decided to build exactly what I needed.

It turns out I’m not the only one with this problem. In our first 48 hours live developers were already using the tool, so it seems like a lot of you are ready to automate this away.

What it actually does: It takes that malformed, hallucinated JSON and runs it through a multi-stage repair process.

It fixes the structural stuff locally in your browser first (for privacy), and then uses an AI fallback for the really messy hallucinations.

Once it's fixed, you can grab the TypeScript, Zod, or Go types with one click so you can get back to actually coding.

I’m hanging out here all day. If you’ve got a "nightmare" JSON file that’s currently giving you hell, throw it at the tool and let me know if it works for you.

What’s the most frustrating JSON error an LLM has handed you lately?