Free & Open Source
Free Online Developer Tools
JSON Formatter, Image Compressor, Password Generator & more. Fast, free, and privacy-friendly — everything runs in your browser.
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Popular Tools
Developer and productivity tools that save you time every day.
JSON Formatter
Format, beautify, minify, and validate JSON data online for free.
Open toolImage Compressor
Compress images online for free. Reduce file size of JPG, PNG, and WebP images.
Open toolPassword Generator
Generate strong, secure, random passwords with customizable options.
Open toolMarkdown Editor
Write Markdown with a live HTML preview. Export as .md or copy rendered HTML.
Open toolBase64 Encoder
Encode and decode Base64 strings online for free. Convert text to Base64 and back instantly.
Open toolUUID Generator
Generate random UUIDs (v4) online for free. Copy unique identifiers instantly.
Open toolQR Code Generator
Generate QR codes from any text or URL for free. Download as PNG instantly.
Open toolImage to Base64
Convert images to Base64 encoded strings online for free. Supports JPG, PNG, WebP, SVG, and GIF.
Open toolText Diff Checker
Compare two blocks of text and find differences instantly. Free online diff tool.
Open toolHTML Minifier
Minify HTML code online for free. Remove whitespace, comments, and reduce file size.
Open toolRandom Word Generator
Generate random English words instantly for writing, brainstorming, games, and education. Filter by word type and length.
Open toolRegex Tester
Test regular expressions in real time with highlighted matches, capture groups, and flag support.
Open toolJWT Decoder
Decode and inspect JWT tokens instantly. View header, payload, and signature in readable JSON format.
Open toolCron Expression Generator
Generate and understand cron expressions with a visual builder. Schedule tasks easily without memorizing cron syntax.
Open toolTimestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. View the current epoch time live.
Open toolWhy Us
Why Use DevUtilityTools?
Built for developers who value speed, privacy, and simplicity.
100% Private
All tools run entirely in your browser. Your data never leaves your device — no uploads, no tracking, no server processing.
Lightning Fast
No file uploads, no waiting for servers. Tools execute instantly in your browser with Web Workers for heavy operations.
Completely Free
No sign-ups, no limits, no premium tiers. Every tool is free to use, forever. Built by developers, for developers.
Learn
Latest Articles
Learn about the technologies behind our tools.
2026-03-08 · 8 min read
What is JSON? A Complete Guide for Developers
Learn what JSON is, why it matters, and how to work with JSON data in web development.
Read article2026-03-08 · 7 min read
How to Compress Images Without Losing Quality
Learn the best techniques and tools for compressing images while maintaining visual quality.
Read article2026-03-08 · 9 min read
Password Security Guide: Creating Strong Passwords in 2026
Everything you need to know about creating and managing strong, secure passwords.
Read article2026-03-08 · 10 min read
The Complete Markdown Guide for Beginners
Master Markdown syntax from basics to advanced features. Write better documentation and content.
Read articleStart Using Free Developer Tools
No sign-up required. Pick a tool and start working — it's that simple.