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
Popular Developer
Base64 Encoder & Decoder
Encode and decode Base64 strings with optional secret-key protection
Free Browser UtilityOpen Tool
Popular Security
Hashing Tool
29+ Cryptographic, password, checksum, fast non-crypto, & similarity 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