JSON Central

JSON Repair

Preview and approve conservative JSON repairs locally

Review proposed JSON syntax repairs with confidence labels, explicitly approve changes and preserve undo, all inside your browser.

Browser-local core JSON tool

Preview and approve safe JSON repairs

0 characters · 0 bytes

Waiting for JSON.

Result

Approved repaired JSON output

No output yet.

Processing stays inside this browser.

Instructions

How to use JSON Repair

Analyze invalid JSON, inspect every proposed change, check the approval box, then apply only when the preview is acceptable.

Real input and output example

{name:'Ada',} can propose quoted keys, double-quoted strings and trailing-comma removal before any source is replaced.

Diagnostics and limitations

What this tool reports clearly

Repair is heuristic. Low-confidence changes may alter intended meaning, so the tool never applies them silently.

Privacy

Files are read with browser APIs and processing runs in a dedicated local Worker. Your JSON is never placed in a network request.

FAQ

Common question

Can I restore the original?

Yes. Applied repairs retain the original input and expose an Undo repair control.