Free Online Developer Tools
A collection of 35+ free online tools for developers. No sign-up required. Fast, secure, and works offline.
JSON Formatter
Format, validate and minify JSON data
Base64 Encoder
Encode and decode Base64 strings
URL Encoder
Encode and decode URL strings
URL Parser
Parse and analyze URL components
UUID Generator
Generate random UUIDs (v4)
Hash Generator
Generate MD5, SHA-1, SHA-256 hashes
JWT Decoder
Decode and inspect JWT tokens
Diff Checker
Compare two texts and find differences
Markdown Editor
Write markdown with live preview
Color Converter
Convert between HEX, RGB, HSL
ASCII Converter
Convert text to ASCII codes
Regex Tester
Test regular expressions live
Timestamp Converter
Convert Unix timestamps
Password Generator
Generate secure passwords
Lorem Ipsum
Generate placeholder text
Case Converter
Convert text case formats
HTML Encoder
Encode/decode HTML entities
Cron Parser
Parse cron expressions
Word Counter
Count words, characters, sentences
Slug Generator
Create URL-friendly slugs
CSV to JSON
Convert CSV to JSON and back
YAML to JSON
Convert YAML to JSON and back
Meta Tag Generator
Generate SEO meta tags
Code Beautifier
Format HTML, CSS, JS, SQL
Number Converter
Binary, Octal, Decimal, Hex
JSON to TypeScript
Generate TS interfaces from JSON
Morse Code
Translate text to Morse code
Binary Translator
Convert text to binary
Text Repeater
Repeat text multiple times
Duplicate Remover
Remove duplicate lines
Text Reverser
Reverse text or words
Age Calculator
Calculate exact age
Percentage Calculator
Calculate percentages
Byte Converter
Convert KB, MB, GB, TB
Placeholder Image
Generate placeholder images
Why Use Devlixr?
🚀 Fast & Free
All tools run instantly in your browser. No server processing, no waiting, completely free.
🔒 Secure & Private
Your data never leaves your browser. We don't store or transmit any information you enter.
📱 Works Everywhere
Responsive design works on desktop, tablet, and mobile. No installation required.