I built a collection of browser-based developer tools that need zero installation. No npm, no Docker, no extensions — just open and use.
Here are the ones developers actually keep coming back to:
Code Formatting & Conversion
- JSON Formatter & Validator — paste messy JSON, get it pretty-printed with syntax highlighting and error detection
- Hex to RGB Converter — convert between hex, RGB, HSL instantly
- Base64 Encoder/Decoder — encode/decode text and files without leaving your browser
- URL Encoder/Decoder — handle query strings and encoded URLs
- Markdown Preview — write and preview markdown in real-time
Testing & Debugging
- Regex Tester — test patterns with live highlighting and match groups
- DNS Leak Test — check if your VPN is actually protecting you
- JWT Decoder — decode JWT tokens without pasting them into sketchy online tools
Productivity
- Lorem Ipsum Generator — paragraphs, sentences, or words
- Cron Expression Builder — build cron schedules visually instead of memorizing the syntax
- Automation ROI Calculator — figure out if automating that task is actually worth it
Why I built these
Every time I needed a quick JSON format or regex test, I'd land on a site plastered with ads that wanted my email. Or worse — a tool that sends my data to some random server.
These tools run 100% in your browser. Nothing gets uploaded. Close the tab and your data is gone.
All 50+ dev tools are at tool.teamzlab.com/dev
They work on mobile too — handy when you're debugging from your phone at 2am.
Originally published at https://tool.teamzlab.com
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