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Bulk UUID v4 Generator

100% Private — No Data UploadedRuns Instantly in Your BrowserZero Server Processing
0 generated

100% Cryptographically Secure

IDs are computed strictly client-side using your browser's native Web Crypto engine. Zero data overhead leaves your device.

How the Bulk UUID v4 Generator Works

Our Bulk UUID v4 Generator creates cryptographically secure, random Universally Unique Identifiers entirely inside your browser using the Web Crypto API. Every UUID is a 128-bit value formatted as a 36-character string (or 32 characters with hyphens removed), generated with the same level of entropy used by TLS certificate key generation.

The tool leverages the browser-native crypto.randomUUID() method, which calls the operating system's CSPRNG (Cryptographically Secure Pseudo-Random Number Generator) to produce truly random numbers. This is far more secure than pseudo-random Math.random() approaches and guarantees a negligible probability of collision even when generating millions of identifiers.

Use the Quantity selector to choose how many UUIDs you need — from a single identifier up to 50 at once. The Uppercase toggle formats all hex characters A-F in capital letters for systems that require it. The Remove Hyphens toggle strips the four dash separators, outputting a raw 32-character string ideal for compact database storage, URL parameters, and API keys.

Everything happens entirely in your browser. No network requests, no server-side processing, no data logging, and no third-party access. Your generated UUIDs never leave your device, making this tool safe for generating production identifiers, API tokens, and session keys in security-sensitive environments.

Why Use Our UUID Generator?

Cryptographically Secure

Powered by the browser-native crypto.randomUUID() API backed by your OS CSPRNG. Far stronger than Math.random() generators.

Bulk Generation

Generate 1, 5, 10, 20, or 50 UUIDs at once. Perfect for seeding test databases, creating API keys, or populating mock datasets.

Flexible Formatting

Toggle uppercase A-F letters and strip hyphens on demand. Match the exact format your database or API requires.

Zero Server Contact

All generation happens client-side. Your UUIDs are never transmitted, logged, or stored on any remote server.

Works Offline

Once loaded, the generator runs without any internet connection. Perfect for secure and air-gapped environments.

One-Click Copy

Copy your entire batch of generated UUIDs to the clipboard instantly with a single button tap.

Frequently Asked Questions

Is this UUID Generator free to use?
Yes, our UUID Generator is completely free with no usage limits, no sign-ups, and no hidden fees. Generate as many UUIDs as you need, as often as you need.
Is my data safe when using this tool?
Absolutely. Every UUID is generated entirely inside your browser using the Web Crypto API native crypto.randomUUID() method. Zero bytes of data are transmitted, logged, or stored on any server. Your generated strings never leave your device.
What is a UUID and what is it used for?
A UUID (Universally Unique Identifier) is a 128-bit identifier that is designed to be globally unique across space and time. Version 4 UUIDs are generated using random numbers from a cryptographically secure random number generator. They are used for database primary keys, API session tokens, distributed system identifiers, file names, blockchain wallet IDs, testing data, and anywhere you need a collision-resistant identifier.
How secure are the UUIDs generated by this tool?
Our generator uses the browser-native crypto.randomUUID() method, which is backed by the operating system's CSPRNG (Cryptographically Secure Pseudo-Random Number Generator). This is the same level of randomness used for TLS key generation, making UUIDs generated here as secure as the OS-level entropy pool.
Can I generate UUIDs without hyphens?
Yes. Toggle the "Remove Hyphens" switch and every generated UUID will be a raw 32-character string (e.g., a1b2c3d4e5f678901234567890123456) instead of the standard 36-character hyphenated format (e.g., a1b2c3d4-e5f6-7890-1234-567890123456).
Can I generate UUIDs in uppercase?
Yes. Toggle the "Uppercase" switch and all generated UUIDs will use capital A-F letters (e.g., A1B2C3D4-E5F6-7890-1234-567890123456) instead of lowercase a-f.
Does this tool work offline?
Yes. Once the page is loaded, the UUID Generator functions entirely within your browser using the native Web Crypto API. No internet connection is required to generate UUIDs after the initial page load.

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