Like most developers, I have a handful of small utilities I reach for every
day — formatting JSON, decoding a JWT, generating a UUID, testing a regex.
For years I just googled "json formatter" and pasted my data into whatever
site came up first. Then one day I caught myself pasting a production JWT
into a random online parser that POSTs everything to its server. That felt
bad. So I built my own toolbox that never sends data anywhere.
It's called WeTool — free, no login, and every tool
runs 100% in your browser. You can open DevTools → Network and confirm
there are zero requests while you use it.
Here are the 15 I use most:
Everyday
- JSON formatter / validator
- URL encode / decode
- Base64 encode / decode
- Timestamp ↔ date converter
Security & encoding
- Hash calculator (MD5 / SHA)
- JWT parser
- UUID generator
- QR code generator
Text & format
- Regex tester
- Text diff
- Markdown preview
- SQL formatter
Debugging
- Cron expression parser
- Color converter
- User-agent parser
Two things that matter to me and might to you:
- Nothing is uploaded. No backend, no login, no tracking of what you type. Local-only.
- 15 languages. Most tool boxes are English-only; this one isn't.
It's free and I'm actively adding tools — if something you use daily is
missing, tell me in the comments and I'll add it.
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