About This Launch
format.sadana.app formats, validates and minifies JSON, converts CSV<->JSON and YAML<->JSON, and shows a line-by-line diff, all locally in your browser. No signup, no upload. Clear error messages with line numbers. Korean + English UI. For developers and anyone cleaning up data files.
Why I Built This
I kept pasting JSON and CSV into random sites that upload data. I wanted one fast, private formatter that runs entirely in the browser.
Launch Details
CategoryDeveloper Tools
StageLive
ListedOctober 16, 2026