Free online tools for developers
Generate valid CPFs for testing
Generate valid CNPJs for testing
Generate valid card numbers for testing
Generate unique UUIDs/GUIDs
Generate strong and secure passwords
Generate MD5, SHA-1, SHA-256 hashes
Generate Lorem Ipsum text for layouts and prototypes
Convert text to URL-friendly slugs
Generate secure and random API keys
Generate random MAC addresses for testing
Generate secure values for environment variables
Generate QR Codes and download as PNG or SVG
Generate CODE128, EAN, UPC barcodes
Generate complete manifest.json for Progressive Web Apps
Create JWT tokens with custom payload
Generate RSA public and private key pairs
Generate HMAC with SHA-256 and SHA-512
Generate realistic test data: names, emails, addresses and more
Validate CPFs quickly
Validate CNPJs quickly
Check how long to crack your password
Test regular expressions with match highlighting
Validate email addresses in bulk
Validate IPv4 and IPv6 addresses
Validate JSON with detailed errors
Validate XML document syntax
Validate HTML structure and syntax
Validate JWT tokens with signature verification
Format and validate JSON online
Format and minify SQL queries
Format and minify XML documents
Format and minify HTML code
Format and minify CSS code
Format and minify JavaScript code
Encode and decode Base64
Convert between HEX, RGB and HSL
Encode and decode URLs
Convert between Unix timestamp and date
Encode and decode HTML entities
Convert text to Unicode and vice versa
Convert text to binary and vice versa
Convert text to hexadecimal and vice versa
Convert text to ASCII codes and vice versa
Convert between binary, octal, decimal and hexadecimal
Convert between KB, MB, GB, TB
Convert between Celsius, Fahrenheit and Kelvin
Convert between JSON and YAML
Generate TypeScript interfaces from JSON
Generate Go structs from JSON
Generate Java classes from JSON
Generate C# classes from JSON
Convert curl commands to JavaScript, Python, PHP and more
Escape and unescape JSON strings easily
Convert text to HTML entities and vice versa
Decode and visualize JWT tokens
Compare two texts and see the differences
Convert text between camelCase, snake_case, kebab-case and more
Count words, characters, lines and paragraphs
Remove duplicate lines from text
Sort lines alphabetically, numerically or randomly
Various text transformations: reverse, remove spaces, shuffle and more
Parse User Agent strings and detect browser, OS and device
Generate meta tags for SEO and Open Graph
Generate and verify BCrypt hashes
Sort Tailwind CSS classes automatically
Complete reference for HTTP status codes (1xx-5xx)
Complete table of HTML entities with search
Encrypt and decrypt with Caesar Cipher and ROT13
Create linear and radial CSS gradients with visual preview
Create CSS shadows with real-time visual preview
Create rounded borders with individual control for each corner
Create CSS shapes with clip-path using visual editor
Create CSS animations with keyframes and real-time preview
Visualize and learn CSS Flexbox interactively
Create CSS Grid layouts with interactive visual preview