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JSON Toolkit

Browser

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.

Open app GitHub
Platform Browser
Live app https://json-toolkit.openlearnia.com
Source https://github.com/openlearnia/json-toolkit
Privacy Runs locally — nothing leaves your device

Features

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