UUID Generator — Bulk
Developer Tools
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About This Tool
Free, private, serverless UUID generator with bulk support. Generate UUID v4 (random), UUID v1-like (time-based), Nano ID, and Short IDs in batches up to 1000. Options for uppercase formatting and removing hyphens. Copy individual or all UUIDs, download as .txt file. Uses cryptographically secure randomness (crypto.getRandomValues). No data leaves your browser — 100% client-side generation for developers.
How to Use
- Select the UUID version — v4 (random), v1-like (time), Nano ID, or Short ID (8 chars).
- Set the count (1–1000) for bulk generation.
- Toggle UPPERCASE or No hyphens options.
- Click Generate.
- Copy All, Copy First, or Download the results as a .txt file.
Frequently Asked Questions
What is a UUID v4?
UUID v4 is a universally unique identifier generated using random numbers. It provides 122 bits of randomness, making collisions virtually impossible. It is the most commonly used UUID version in modern applications.
What is a Nano ID?
Nano ID is a URL-friendly, unique string identifier. It uses an alphabet of 64 characters (A-Z, a-z, 0-9, _, -) and is more compact than UUIDs while maintaining strong uniqueness guarantees.
Is the generation cryptographically secure?
Yes. This tool uses the Web Crypto API (crypto.getRandomValues and crypto.randomUUID) which provides cryptographically secure random numbers, suitable for security-sensitive applications.
What are the use cases?
Generating primary keys for databases, creating unique session tokens, assigning transaction IDs, building API keys, generating file names, testing and development with placeholder identifiers, and bulk data seeding.
Can I generate UUIDs without hyphens?
Yes. Check the "No hyphens" option to generate compact 32-character hexadecimal strings instead of the standard 36-character hyphenated format.
Does it run in my browser?
Yes. Once the page loads, UUID generation runs entirely in your browser using your browser's built-in cryptographic random number generator. No data is sent to any server.
Guides & Tutorials
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