About DevToolBox

What is DevToolBox?

DevToolBox is a free, online collection of everyday utilities for software developers. Whether you need to format a JSON blob, encode a string in Base64, generate a UUID, decode a JWT, or quickly test a regex pattern — DevToolBox has you covered with a clean, fast interface.

Currently offering 12 tools, DevToolBox is designed to be your go-to Swiss Army knife for common development tasks, accessible from any modern browser without installing anything.

Your Data Stays Yours

100% client-side. Every tool on DevToolBox runs entirely in your browser using JavaScript. The data you paste, type, or generate never leaves your device. There are no backend servers, no databases, and no API calls that process your input. You can even disconnect from the internet after the page loads — everything still works.

🔒 Private — Your sensitive data (passwords, tokens, API keys) stays local.
⚡ Fast — No network latency. Results appear instantly.
🌐 Offline-capable — Works without internet after initial load.

Available Tools

JSON JSON Formatter & Validator — Format, validate, and browse JSON with a collapsible tree view

Base64 Base64 Encode / Decode — Encode and decode text to and from Base64

UUID UUID Generator — Generate v4 UUIDs with one click

URL URL Encoder / Decoder — Encode and decode URL components

Hash Hash Generator — Generate MD5, SHA-1, SHA-256, SHA-512 hashes

JWT JWT Parser — Decode and inspect JWT headers and payloads

Regex Regex Tester — Test regular expressions with real-time matching and capture groups

QR QR Code Generator — Generate QR codes from text or URLs

Time Timestamp Converter — Convert between Unix timestamps and human-readable dates

Key Password Generator — Generate strong, customizable passwords

HTTP HTTP Status Codes — Quick reference for HTTP status codes

YAML JSON ↔ YAML Converter — Convert between JSON and YAML formats

Technology

DevToolBox is built with vanilla JavaScript and runs on Cloudflare Pages for fast global delivery. We use open-source libraries loaded via jsDelivr CDN for specific functionality:

js-yaml — YAML parsing and dumping
qrcode.js — QR code generation

No frameworks, no build steps, no complexity — just fast, reliable tools.

Contact

Have a suggestion, found a bug, or want to contribute? We'd love to hear from you.

📧 [email protected]

🐛 GitHub Repository — Report issues, suggest features, or browse the source code.

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