Generator Tools
Generate passwords, QR codes, UUIDs, fake data, barcodes, and more directly in your browser. Every tool is free, requires no signup, and runs 100% client-side.
Code and Data Generators for Every Development Workflow
Developers constantly need to generate data: unique identifiers for database records, secure passwords for new accounts, QR codes for marketing campaigns, fake data for testing, and placeholder images for mockups. These generator tools produce exactly what you need in seconds, all running locally in your browser with no server dependencies and no rate limits.
Security Generators: Passwords, Keys, and Tokens
The Password Generator creates cryptographically secure passwords using the Web Crypto API. Configure length, character sets (uppercase, lowercase, numbers, symbols), and exclusion rules to meet any password policy. The RSA Key Generator produces public/private key pairs for SSH, JWT signing, and encryption. Both tools run entirely in your browser -- your generated secrets never touch a server.
Unique Identifiers: UUID, ULID, and More
The UUID Generator produces v4 UUIDs using cryptographically secure random bytes, with bulk generation of up to 100 IDs at a time. For applications where sort order matters, the ULID Generator creates lexicographically sortable identifiers that encode a timestamp. The MAC Address Generator creates valid MAC addresses for network testing and virtualization.
Visual Generators: QR Codes, Barcodes, and Favicons
The QR Code Generator encodes URLs, text, Wi-Fi credentials, vCards, and more into downloadable QR codes with customizable colors and error correction. The Barcode Generator supports Code 128, EAN-13, UPC-A, and other standard formats for inventory and retail applications. The Favicon Generator creates multi-size favicon sets from text, emoji, or uploaded images, outputting all the sizes modern browsers expect.
Data Generators: Fake Data and Placeholders
Testing with realistic data is critical for catching bugs before production. The Fake Data Generator creates realistic names, addresses, emails, phone numbers, companies, and more in JSON, CSV, or SQL format. The Placeholder Image Generator creates sized placeholder images for wireframes and prototypes. The Random Name Generator and Random Number Generator handle quick ad-hoc generation needs.
Utility Generators: Slugs, Signatures, and Palettes
The Slug Generator converts text into URL-friendly slugs, handling accented characters, special symbols, and word separators. The Email Signature Generator builds professional HTML email signatures with your name, title, contact info, and social links. The Color Palette Generator creates harmonious color schemes using color theory algorithms.
Cryptographic Safety and Privacy
All generator tools that involve security (passwords, UUIDs, RSA keys) use the browser's Web Crypto API, which provides the same cryptographic randomness used for TLS connections. No generated data is sent to any server, logged, or stored. The source code is visible in your browser's developer tools for verification. These tools are safe for generating production passwords, API keys, and encryption key pairs.
Frequently Asked Questions
How secure are the generated passwords?
Passwords are generated using the Web Crypto API's cryptographically secure random number generator (crypto.getRandomValues). This provides the same quality of randomness used by browsers for TLS and other security-critical operations. The generated passwords never leave your browser -- there is no server request, no logging, and no storage. For maximum security, use passwords of 16+ characters with mixed case, numbers, and symbols.
What is the difference between UUID and ULID?
UUID v4 is a 128-bit identifier generated from random bytes, formatted as 32 hex characters with hyphens (e.g., 550e8400-e29b-41d4-a716-446655440000). ULID (Universally Unique Lexicographically Sortable Identifier) encodes a timestamp in the first 48 bits, making ULIDs sortable by creation time while remaining globally unique. ULIDs are preferred for database primary keys where insertion order matters.
Can I generate QR codes for any content?
Yes. The QR Code Generator supports URLs, plain text, email addresses, phone numbers, Wi-Fi credentials, vCards, and any other text content up to approximately 4,000 characters. You can customize the size, error correction level, foreground and background colors, and download the QR code as PNG or SVG. All generation happens in your browser using the Canvas API.
What kind of fake data can I generate?
The Fake Data Generator creates realistic-looking names, email addresses, phone numbers, street addresses, company names, dates, credit card numbers (not real), IP addresses, user agents, and more. You can generate data in JSON, CSV, or SQL INSERT format. This is invaluable for populating development databases, testing form validation, and creating demo content without using real personal information.
Are these generator tools safe to use for production data?
Yes for security generators (passwords, UUIDs, RSA keys) -- they use the Web Crypto API which provides cryptographically secure randomness. All generation happens in your browser with no server involvement. For UUIDs and ULIDs, collision probability is astronomically low. For RSA keys, standard key sizes (2048-bit minimum, 4096-bit recommended) are supported for production use.