18 free developer tools that run 100% in your browser. No signup, no tracking, all client-side processing. Your data never leaves your device.
Tools included
JSON Formatter, Base64 Encoder, JWT Decoder, SQL Formatter, Cron Parser, Regex Tester, QR Code Generator, CSV↔JSON Converter, CSS/JS/HTML Minifier, Diff Checker, Markdown Preview, Color Converter, Password Generator, UUID Generator, URL Encoder, Timestamp Converter, HTTP Status Reference, HTML Entity Encoder.
Why it fits
Pure client-side (no server backend)
Free forever
Open source (GitHub Pages hosted)
Developer-focused UI with dark theme
Originally created by @Linanxi12 on GitHub (May 30, 2026).
Original GitHub issue: https://github.com/devtoolsd/awesome-devtools/issues/245
## Project
**QuickDev** — https://linanxi12.github.io/devbox-tools/
## Description
18 free developer tools that run 100% in your browser. No signup, no tracking, all client-side processing. Your data never leaves your device.
## Tools included
JSON Formatter, Base64 Encoder, JWT Decoder, SQL Formatter, Cron Parser, Regex Tester, QR Code Generator, CSV↔JSON Converter, CSS/JS/HTML Minifier, Diff Checker, Markdown Preview, Color Converter, Password Generator, UUID Generator, URL Encoder, Timestamp Converter, HTTP Status Reference, HTML Entity Encoder.
## Why it fits
- Pure client-side (no server backend)
- Free forever
- Open source (GitHub Pages hosted)
- Developer-focused UI with dark theme
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Originally created by @Linanxi12 on GitHub (May 30, 2026).
Original GitHub issue: https://github.com/devtoolsd/awesome-devtools/issues/245
Project
QuickDev — https://linanxi12.github.io/devbox-tools/
Description
18 free developer tools that run 100% in your browser. No signup, no tracking, all client-side processing. Your data never leaves your device.
Tools included
JSON Formatter, Base64 Encoder, JWT Decoder, SQL Formatter, Cron Parser, Regex Tester, QR Code Generator, CSV↔JSON Converter, CSS/JS/HTML Minifier, Diff Checker, Markdown Preview, Color Converter, Password Generator, UUID Generator, URL Encoder, Timestamp Converter, HTTP Status Reference, HTML Entity Encoder.
Why it fits