매일 사용하는 브라우저 기반 개발 도구 15개 — 로그인 없음, 업로드된 항목 없음

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:

1. Nothing is uploaded. No backend, no login, no tracking of what you type. Local-only.
2. 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.

👉 wetool.site