Fast, modern utilities for your daily development workflow. Format code, generate passwords, design UI — all free, all private, all in your browser.
The most-loved tools by developers worldwide
Calculate aspect ratios and dimensions for images or videos.
Quickly calculate percentages.
Calculate the pixel density of any screen.
Encode and decode text to and from Base64.
Convert colors between HEX, RGB, and HSL formats.
Convert CSV data into a JSON array of objects.
Convert between different data size units (KB, MB, GB, etc).
Convert between various CSS units like px, em, rem, pt.
Built with modern standards and a passion for beautiful developer tools
All tools run directly in your browser with zero server round-trips. Experience instant results every time you use a tool, powered by modern web APIs and efficient algorithms.
Your data never leaves your browser. No data collection, no tracking, no analytics. Complete privacy guaranteed with zero-knowledge architecture.
Designed by developers who understand daily workflows. Every tool solves real problems with clean interfaces and powerful functionality.
A stunning glassmorphism UI with smooth GSAP animations and micro-interactions. Tools as beautiful as they are powerful.
Fully responsive design that adapts to any screen. Use Devly on desktop, tablet, or mobile with the same great experience.
Regularly updated with new tools and improvements. From formatters to generators, the toolkit keeps expanding to cover every dev need.
Join thousands of developers who use Devly daily
“Devly has completely replaced my bookmarked converter tools. The JSON formatter and CSS generators save me hours every week. The UI is absolutely stunning.”
“The best developer tools collection I've ever used. Everything works instantly, the glassmorphism design is gorgeous, and GSAP animations make it feel premium.”
“The color tools and SVG generators are incredibly useful for my design workflow. The contrast checker and palette generator are my daily go-to tools.”
63+ developer tools. Zero cost. Zero sign-up. Infinite productivity.