CoShareX Logo
HomeUtilitiesUUID Generator

UUID / GUID Generator

Generate cryptographically secure UUID (GUID) v4 strings online. Bulk generate unique identifiers with uppercase, lowercase, and hyphen options.

Generator Settings

What is the UUID Generator?

The UUID Generator creates random Universally Unique Identifiers (UUID v4) suitable for database keys, tracking tokens, and mock data.

How to Use the Tool

  1. Select the number of UUIDs you want to generate.
  2. Customize formatting options such as uppercase characters or removing hyphens.
  3. Click Generate or Copy to export your identifiers.

Common Use Cases

  • Creating primary keys for distributed database seeding.
  • Generating mock session tokens and API tracking IDs.
  • Testing database schema constraints and unique index behaviors.

Supported Formats & Options

Generates RFC 4122 compliant version 4 UUIDs with options for bulk count, case toggling, and delimiter customization.

Related Guides & Tutorials

Utilities • 4 min read
How to Generate and Use UUID v4 in Web Applications

A developer guide on generating Universally Unique Identifiers (UUID v4) using native web APIs and secure programming libraries.

Read Guide
Utilities • 5 min read
UUID vs GUID vs ULID: Which Unique Identifier Should You Choose?

A comparison guide between UUID, GUID, and lexicographically sortable ULID identifiers for database keys and system designs.

Read Guide
Security • 4 min read
Password Entropy and Cryptographic Randomness: A Developer Guide

Understand password entropy, why Math.random() is insecure for passwords, and how CSPRNG generates collision-proof credentials.

Read Guide
Utilities • 3 min read
Understanding UUIDs: What Is UUID v4 and How Does It Work?

Learn what UUIDs and GUIDs are, how RFC 4122 v4 generates collision-resistant identifiers, and when to use them in databases.

Read Guide

Related Developer Tools

Base64 Encoder / Decoder

Encode plain text to Base64 format or decode Base64 back to plain text.

Open Tool
JSON Formatter

Format, beautify and pretty-print JSON data client-side.

Open Tool

Frequently Asked Questions

Are generated UUIDs cryptographically secure?

Yes. They are generated using the browser's native crypto.randomUUID() API following RFC 4122 v4 standards.

Can I generate UUIDs in bulk?

Yes. You can generate between 1 and 500 UUIDs at once, with options to toggle hyphens, uppercase formatting, or brackets.