Tooly
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…
Tooly launched on December 27, 2025 with 5 votes, #2,550 of 11,628 launches that month.
What it does
A collection of daily developer utilities (JSON Formatter, JWT Decoder, Base64, etc.). Built with React. Your data never leaves your browser. No signup, no clutter, just tools.
Free local developer tools: JSON formatter and filter, JSON/CSV/YAML converter, regex tester, Base64 and JWT decoder, text diff, and timestamp converter. No ads or signup.
In the maker’s words, at launch
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…
Does a similar job
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JSON FormatterMay 2026 · formatjson.online · ▲2Beautify, validate & convert JSON — free, no login and fast.
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