Openlearnia

JSON Toolkit

Format, validate, and minify JSON in the browser.

Privacy-first JSON utility. Paste or load JSON locally, pretty-print, minify, validate with parser error details, and copy output — no data leaves your browser.

Platform: Browser

Live app: https://json-toolkit.openlearnia.com

Source: https://github.com/openlearnia/json-toolkit

Open app GitHub

Features

Paste JSON or load from a local file
Pretty format and minify JSON
Validate with line/column error details
Copy output to clipboard