jsonfmt.dev

Developer Tools

Format, validate, diff, convert JSON. 100% client-side.

About

Effortlessly format, validate, minify, and beautify JSON data directly in your browser. Features include a tree view, diff tool, JSON to YAML/CSV/XML conversion, JWT decoder, and repair functionality. It's free to use, requires no registration, and functions even without an internet connection.

Launched

March 10, 2026Week 1

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