Small tools. Zero friction.
RedGreen Studio builds tiny, focused web apps that run entirely in your browser — fast, free, and private by default.
Our Apps
JSON Viewer
View, validate and modify JSON with a fast, interactive tree editor. Format, search, and fold nested data — all client-side.
Open JSON Viewer →Diff Finder
Find text and JSON differences side-by-side and export the results as a PDF. No data ever leaves your browser.
Open Diff Finder →QR Generator
Generate a QR code from any text directly in your browser. Fast, free, and private by default.
Open QR Generator →Base64 Utility
Encode and decode Base64 text securely in your browser, with no data sent to a server.
Open Base64 Utility →JWT Utility
Decode and verify JSON Web Tokens locally with clear structure and signature status.
Open JWT Utility →