ShadowToolkit

UUID / GUID Generator

Generate secure UUID v4 (Universally Unique Identifiers) instantly.

100% In-Browser
100% In-Browser PrivacyLocal

Your files and data are processed locally and never leave your device.

Password Generator

Select options below
Password StrengthVery Strong (~118 bits)
18 Characters

What is UUID / GUID Generator?

UUID / GUID Generator creates universally unique identifiers using cryptographically secure pseudorandom number generators (CSPRNG) via the Web Crypto API. Generate individual or bulk batches of UUID v4 identifiers with custom hyphenation and uppercase/lowercase formatting.

Zero-Server Client-Side Guarantee

Unlike legacy online utilities that upload sensitive media and documents to remote cloud storage, Shadow Toolkit executes this entire operation directly within your browser's local runtime. Your raw data never crosses the network.

Key Capabilities

  • Cryptographically secure UUID v4 generation via crypto.getRandomValues()
  • Bulk generation from 1 to 1,000 UUIDs in a single pass
  • Formatting toggles: Uppercase, Lowercase, with/without hyphens, curly braces, and JSON array export
  • 1-Click 'Copy All' and plain text file download
  • 100% private client-side generation

Common Use Cases

1Generating primary keys for database migrations and mock seeding scripts
2Creating unique correlation IDs for API transaction tracing and logging
3Generating unique session tokens and device identifiers for software testing
4Accelerating daily software development workflows, API debugging, and frontend data modeling

How to use UUID / GUID Generator

01

Select Quantity & Format

Specify how many UUIDs you need and choose uppercase/lowercase or hyphen options.

02

Generate

Click 'Generate UUIDs' to create cryptographically random identifiers.

03

Copy or Export

Click 'Copy to Clipboard' or download as a text file.

04

Integrate with Project

Click 'Copy to Clipboard' or download the file to integrate the verified UUID / GUID Generator output directly into your application codebase or API client.

Frequently Asked Questions

The probability of a collision is astronomically low (1 in 2^122, or roughly 1 in 5.3x10^36), making UUIDs virtually guaranteed to be globally unique.

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