UUID generator. Generate UUID v4 identifiers instantly with support for bulk generation, uppercase, and hyphen control.
100% browser-based — your data never leaves your device
Generate UUID v4 identifiers instantly.
Select how many UUIDs you need (1 to 100).
Toggle uppercase/lowercase and choose whether to include hyphens.
Click Generate to create UUID v4 identifiers instantly.
Copy individual UUIDs or click Copy All to copy the entire list at once.
Ctrl+Enter to generate uuids
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UUID Generator is a free online security tool that generate uuid v4 identifiers instantly. It works entirely in your browser — no downloads, no installations, and no server uploads required. security engineers, backend developers, system administrators use UUID Generator when they need a fast, privacy-respecting way to process security data without installing additional software. It supports capabilities such as bulk generation, copy all, uppercase option. Additional features include hyphen control. Common use cases include generating unique database primary keys, creating unique identifiers for api resources, generating session tokens and correlation ids. All processing happens locally using modern browser APIs, which means your data never leaves your device. This makes UUID Generator ideal for working with sensitive data, proprietary code, or any situation where privacy matters.
UUID Generator is a free online security tool that helps you generate uuid v4 identifiers instantly. Key capabilities include bulk generation, copy all, uppercase option. All processing is done locally in your browser — no data is uploaded, stored, or shared with any server. There are no sign-ups, no file size limits, and no hidden charges. It is commonly used to generating unique database primary keys.
Select how many UUIDs you need (1 to 100).
Toggle uppercase/lowercase and choose whether to include hyphens.
Click Generate to create UUID v4 identifiers instantly.
Copy individual UUIDs or click Copy All to copy the entire list at once.
| Category | Details |
|---|---|
| Input Limits | Maximum input size: Browser memory bound |
| Key sizes: 128–4096 bits (algorithm dependent) | |
| Supported Formats | Raw text, Hex, Base64, Binary, JWT / JWS / JWE |
| Browser Engine |
|
All operations run entirely in your browser using built-in Security APIs. No server uploads, no data storage, and no third-party requests.
UUID Generator is ideal when you need to generating unique database primary keys without installing software or uploading data to a server. Since everything runs in your browser, there is no setup time and no risk of your data being stored on external servers. For for command-line cryptographic operations, consider using OpenSSL CLI. For for enterprise secret management, HashiCorp Vault may be a better fit. UUID Generator fills the gap between heavyweight desktop tools and insecure online services that require uploading your data.
No. UUID Generator processes everything entirely in your browser using JavaScript. Nothing you type, paste, or upload is ever transmitted to any server. Your data never leaves your device.
A UUID (Universally Unique Identifier) is a 128-bit identifier standardized by RFC 4122.
Yes. Uses crypto.getRandomValues() for cryptographically strong randomness.
Generate 1 to 100 UUIDs at once with a single click.
Copy all generated UUIDs to clipboard as a newline-separated list.
Toggle between lowercase and uppercase hexadecimal.
Option to include or remove hyphens from generated UUIDs.
UUID Generator is useful in a variety of scenarios across different workflows:
Generating unique database primary keys
Creating unique identifiers for API resources
Generating session tokens and correlation IDs
UUID v4 is the standard for randomly generated UUIDs. For time-ordered UUIDs, consider UUID v7 which sorts naturally by creation time.
Many databases and APIs accept UUIDs without hyphens. Our tool supports both formats for maximum compatibility.
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