Free online developer tools
Formatters, encoders and converters for everyday dev work. 11 tools, all free and private.
Password GeneratorPopularCreate strong, random passwords with one click.JSON Formatter & ValidatorBeautify, minify and validate JSON with clear error messages.Base64 Encoder & DecoderEncode or decode Base64 text and turn files into data URLs.URL Encoder & DecoderPercent-encode or decode URLs and query string values.UUID GeneratorGenerate random v4 UUIDs (GUIDs) in bulk.Hash GeneratorGenerate MD5, SHA-1, SHA-256 and SHA-512 hashes from text or files.Color ConverterConvert colors between HEX, RGB, HSL, HSV and CMYK, with contrast checks.CSV to JSON ConverterConvert CSV to JSON and JSON to CSV, with a live table preview.JWT DecoderDecode JSON Web Tokens and inspect their header, payload and expiry.Regex TesterTest JavaScript regular expressions with live highlighting and groups.Unix Timestamp ConverterConvert Unix timestamps to dates and back, in seconds or milliseconds.