HavenTools JSON Toolkit

Fast, private, and local JSON formatter, validator, and minifier. No data leaves your browser.

HavenTools JSON Toolkit is a fast, privacy-first JSON utility that runs entirely in your browser. Format, validate, minify, inspect, and copy JSON without uploading your data to a server. Features • Format JSON with 2, 4, or 8-space indentation • Validate JSON and show clear syntax errors • Minify valid JSON into a compact single line • Copy formatted or minified JSON to your clipboard • Keyboard-friendly workflow with Ctrl/Cmd + Enter • Clear/reset your workspace easily Privacy-first All JSON processing happens locally in your browser. Your JSON is not uploaded to HavenTools or any other server. The extension has no account requirement, analytics, advertising, telemetry, or tracking, and works offline. HavenTools JSON Toolkit is designed for developers, QA engineers, analysts, and anyone who needs a quick local JSON utility.