A small web app to validate, format, repair, and escape JSON. Everything runs in the browser; no data is sent to any server.

• Validate – Parse JSON and see errors with line/column
• Beautify / Minify – Format or compress JSON
• Repair – Fix common issues (trailing commas, unquoted keys, etc.) via jsonrepair
• Escape / Unescape – JSON string escaping

npm install
npm run dev

Open http://localhost:3000.

npm run build
npm run start

Licensed under the GNU Affero General Public License v3.0 — see LICENSE.

Free to use, modify, and self-host. If you run a modified version as a network service, you must open-source your modifications (AGPL §13). For commercial licensing without copyleft obligations, contact [email protected].