Developer & Web Utilities
Free Online Tools
Fast, lightweight browser-based tools for developers, designers, and creators. All operations execute locally in your browser with zero data collection or account sign-ins.
Popular Developer
JSON Formatter & Validator
Format, validate, prettify, and minify JSON data instantly
Free Browser UtilityOpen Tool
Popular Text
Text Case Converter & Counter
Convert text between camelCase, snake_case, UPPERCASE, and calculate stats
Free Browser UtilityOpen Tool
Developer
Base64 Encoder & Decoder
Encode text strings to Base64 and decode Base64 data
Free Browser UtilityOpen Tool
Popular Security
Hash & Checksum Generator
Generate secure MD5, SHA-1, SHA-256, and SHA-512 hashes
Free Browser UtilityOpen Tool
Design
PX ↔ REM & Aspect Ratio Calculator
Convert PX to REM units and compute responsive CSS aspect ratios
Free Browser UtilityOpen Tool
Design
Color Palette & Contrast Checker
Convert HEX, RGB, HSL, and check WCAG text contrast ratios
Free Browser UtilityOpen Tool