UtilArk
All-in-one browser utility tools
Base64 Encoder / Decoder
Encode or decode text to/from Base64
URL Encoder / Decoder
Encode or decode URL strings
JSON Formatter
Format, validate, and convert JSON to YAML/TOML
YAML Formatter
Format, validate, and convert YAML to/from JSON
TOML Formatter
Format, validate, and convert TOML to/from JSON
UUID Generator
Generate random UUID (v4)
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text
Unix Timestamp Converter
Convert between Unix timestamps and dates
JWT Decoder
Decode JWT token header and payload
Password Generator
Generate secure random passwords
Number Base Converter
Convert between binary, octal, decimal, hexadecimal and more
Byte Unit Converter
Convert between B, KB, MB, GB, TB, PB
Color Code Converter
Convert between HEX, RGB, and HSL color codes
Regex Tester
Test regular expressions with real-time matching
Image Format Converter
Convert between PNG, JPG, and WebP image formats
QR Code Generator
Generate QR codes from text or URLs
Unit Converter
Convert between length, weight, temperature, area, and speed units
Lorem Ipsum Generator
Generate placeholder text
Percentage Calculator
Perform common percentage calculations
Lunar Calendar Converter
Convert between solar (Gregorian) and Korean lunar calendar dates
Age Calculator
Calculate Korean age and international age from birth date
Placeholder Image Generator
Generate placeholder images with custom size, color, and text
Image Resizer
Resize images to custom dimensions
Image Cropper
Crop images by dragging or entering coordinates