75 developer utilities. All free, all offline, all private.
Generate sample data for testing
String encoding, hashing, and encryption in one place
Convert YAML data to JSON format
Convert JSON data to YAML format
Format, validate and beautify JSON data
Validate JSON against a schema
Convert and analyze Unix timestamps
Debug and verify JWT tokens
Create and sign JSON Web Tokens
Convert colors between different formats
Encode and decode Base64 strings
Convert images to/from Base64 format
Test and debug regular expressions
Encode and decode URLs
Parse and analyze URL components
Convert HTML entities
Escape and unescape special characters
Format and minify HTML code
Format and minify CSS code
Format and minify JavaScript code
Format and minify XML documents
Convert between XML and JSON formats
Format and minify LESS code
Format and minify SCSS code
Format and minify ERB (Ruby) templates
Format SQL queries for better readability
Convert between SQL and JSON formats
Convert TypeScript code to JavaScript
Obfuscate and protect JavaScript code
Validate and analyze IP addresses
Reference for all HTTP status codes
Comprehensive MIME types lookup
Test REST APIs with custom requests
Sort and remove duplicate lines
Convert hexadecimal to ASCII text
Convert ASCII text to hexadecimal
Live preview of HTML code
Live preview of Markdown content
Strip comments from source code
Convert HTML code to JSX format
Convert JSON data to CSV format
Convert CSV data to JSON format
Convert between CSV and TSV formats
Convert Excel files to JSON or CSV
Convert JSON to type definitions and classes
Convert CURL commands to various languages
Compare two texts with rich diff views
Convert text between different cases
Generate random strings with custom patterns
Serialize data to PHP format
Deserialize PHP serialized data
Convert PHP data to JSON format
Convert JSON data to PHP format
Decode and analyze SSL certificates
Parse and explain cron expressions
Create and scan QR codes
Convert formats and reduce image size (bulk)
Generate placeholder text
Count characters, words, sentences and paragraphs
Convert SVG to CSS background-image data URI
Convert CSS data URI back to SVG code
Convert numbers between binary, decimal, hex
Generate timestamps for Discord messages
Stay focused with the Pomodoro Technique
Analyze text readability and complexity
Parse and validate TOML configuration
Parse and edit INI configuration files
Convert between different units of measurement
View time across multiple timezones
Precision stopwatch with lap times
Calculate Body Mass Index
Convert speech to text in real-time
Visual code comparison with neon glow highlights — bad vs good, or cross-language
Trello-style task management with drag-and-drop
Scan open ports and kill processes with one click
75 of 75 tools shown