Tool
JSON Fix Online
Repair malformed JSON, validate strict JSON, format output, minify payloads, and keep the whole workflow local in your browser.
What JSON Fix repairs
The repair tool handles the syntax mistakes developers most often get from copied configs, logs, quick scripts, and LLM output.
- single quotes
- unquoted keys
- trailing commas
- Python True, False, and None
- JavaScript comments
- markdown code fences
- hex numbers
Private by default
All parsing, repair, formatting, minifying, and copying runs in the browser. Your JSON is not uploaded to a server.