💻 Free Online Developer Tools
Free online developer tools — JSON formatter, Base64 encoder, regex tester, JWT decoder, code minifier, and more.
22 tools available · 100% free · No signup required
JSON Formatter
Format, validate and beautify JSON online for free. Pretty-print JSON with syntax highlighting, error detection, and minification instantly.
Base64 Encoder / Decoder
Encode and decode Base64 strings online for free. Supports text, files, and images with instant conversion and UTF-8 support.
Regex Tester
Test and debug regular expressions online for free. Live match highlighting with flags support.
HTML to JSX Converter
Convert HTML to JSX syntax online for free. Automatically converts attributes and class names for React.
Minify CSS / JS / HTML
Minify CSS, JavaScript, and HTML online for free. Reduce file size and improve page load speed.
Beautify CSS / JS / HTML
Beautify and format CSS, JavaScript, and HTML code online for free. Pretty-print with proper indentation.
JSON to CSV Converter
Convert JSON data to CSV format online for free. Export JSON arrays to spreadsheet-ready CSV files.
JWT Decoder
Decode and inspect JWT tokens online for free. View header, payload, and signature without a server.
UUID Generator
Generate UUIDs (v4) online for free. Create unique identifiers instantly.
Timestamp Converter
Convert timestamps to human-readable dates and vice versa. Unix timestamp converter online for free.
SQL Formatter
Format and beautify SQL queries online for free. Pretty-print SQL with proper indentation.
XML Formatter
Format and beautify XML documents online for free. Pretty-print XML with proper indentation.
YAML Formatter
Format and validate YAML files online for free. Pretty-print YAML with proper indentation.
Markdown Previewer
Preview Markdown in real-time online for free. Write and render Markdown with live preview.
CSS Gradient Generator
Generate CSS gradients online for free. Create linear, radial, and conic gradients visually.
Box Shadow Generator
Generate CSS box shadows online for free. Create and preview box shadows visually.
Color Palette Generator
Generate color palettes online for free. Create harmonious color schemes for your designs.
CSS Button Generator
Generate CSS buttons online for free. Create beautiful styled buttons with live preview.
HTML Encoder / Decoder
Encode and decode HTML entities online for free. Convert special characters to HTML entities.
Diff Checker
Compare two texts and find differences online for free. Highlight additions and deletions.
Code Screenshot Generator
Generate beautiful code screenshots online for free. Create shareable code images for social media.
Unix Timestamp Converter
Get current Unix timestamp and convert between Unix time and dates online for free.