About DevTools

DevTools is a collection of 26 free developer utilities that run entirely in your browser. No signup, no ads, no data sent to servers. Built for developers who want fast, reliable tools without friction.

All 26 tools

JSON Formatter & Validator

Base64 Encoder/Decoder

URL Encoder/Decoder

JWT Decoder

Hash Generator (MD5, SHA-1, SHA-256, SHA-512)

UUID Generator (v4)

Unix Timestamp Converter

Regex Tester

Text Diff Comparison

Lorem Ipsum Generator

Color Converter (HEX/RGB/HSL/OKLCH)

Tailwind CSS Color Reference

Password Generator (crypto-secure)

Word & Character Counter

Cron Expression Generator

YAML ↔ JSON Converter

100% client-side

Every tool runs entirely in your browser using JavaScript and the Web Crypto API. Your JSON, JWTs, passwords, and text never leave your device. There are no server round-trips, no API calls, and no tracking. Even the password generator uses cryptographically secure randomness via crypto.getRandomValues().

Why we built this

Every developer has a collection of bookmarked utility sites — one for JSON, another for Base64, another for UUIDs. Most are ad-heavy, slow, or require signup. DevTools puts 26 essential utilities in one place, all free, all fast, all private.

Built by DavrApps

DavrApps is an independent software studio building fast, privacy-first web tools. Our products: Picefy (screenshot beautifier), ImgTools (image processing), DevTools (developer utilities), ShipKit (Next.js boilerplate).

Tech stack

Next.js 16 + Bun

Static generation, edge-fast

Web Crypto API

Secure client-side processing

TypeScript

Full type safety across all tools

Cloudflare CDN

Global edge caching, SSL

Contact

Questions or feedback: hello@davrapps.dev