I kept opening online JSON formatters and getting buried in ads and popups. So I made a clean version with a few tools I actually use daily – JSON formatter with syntax highlighting, Base64 encoder/decoder, JWT decoder, text diff, and timestamp converter.

Everything runs client-side. No tracking, no server calls, no signup walls.

Built with React 19 and TypeScript. It's open source: https://github.com/chken007/tooly

My 5-year-old helped name it. She insisted on "Tooly" and I couldn't argue with that logic.

Open to feedback – especially if you spot bugs or have feature ideas.