Free Developer Tools Online
Free online developer tools for JSON, Base64, regex, hashing, and more.
JSON Formatter
Format, validate and beautify your JSON data instantly. Supports syntax highlighting, error detection, and minification. Free online tool - no signup required.
Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 to text instantly. Supports UTF-8. Free online Base64 encoder and decoder - no signup required.
Regex Tester
Test regular expressions with real-time highlighting, match details, and capture groups. Free online regex tester - no signup required.
Color Picker
Pick colors and convert between HEX, RGB, and HSL formats instantly. Free online color picker with visual preview - no signup required.
UUID Generator
Generate random UUID v4 identifiers instantly. Bulk generation, uppercase, and hyphen options. Free UUID generator - no signup required.
MD5 Hash Generator
Generate MD5 hashes from any text instantly. Free online MD5 hash generator with one-click copy - no signup required.
URL Encoder/Decoder
Encode and decode URLs and query parameters instantly. Supports encodeURIComponent and encodeURI. Free online URL encoder/decoder.
SHA-256 Generator
Generate SHA-256 hashes from any text using the Web Crypto API. Free online SHA-256 hash generator - no signup required.
CSS Gradient Generator
Create beautiful CSS gradients with a visual editor. Supports linear, radial, and conic gradients. Copy CSS code instantly. Free online tool.
Timestamp Converter
Convert between Unix timestamps and human-readable dates. Live current timestamp, ISO 8601, and UTC formats. Free online timestamp converter.