ZeroData Tools
Tools
JSON Formatter Format and validate JSON instantly with no uploads, no server calls, and no stored data. JSON Validator Validate JSON instantly before deploys with local processing and zero server calls. YAML Validator Validate YAML files and catch indentation errors instantly with no uploads or backend processing. Base64 Encoder Encode or decode Base64 strings instantly with zero uploads. URL Encoder Encode and decode query parameters locally for APIs, redirects, and forms. HTML Formatter Pretty-print messy markup and inspect structure without exposing page code. CSS Minifier Shrink stylesheets for production with browser-only processing and instant output. JavaScript Beautifier Reformat dense JavaScript into readable code locally for debugging.

UUID / GUID Generator

Generate secure UUIDs (v4) instantly in your browser. Perfect for database seeding.

Advertisement
UUID Generator
Processed entirely in your browser using crypto.randomUUID().
Ctrl+Enter Generate
Configuration UUID v4
Generated UUIDs Read only output
Ready Browser only
Select the number of UUIDs you need and click Generate.

How ZeroData protects your privacy

  • ✓ No Uploads: Processing happens entirely via client-side JavaScript.
  • ✓ No Storage: We do not have a database. We physically cannot save your data.
  • ✓ No Tracking: We don't log what you process or track your inputs.
  • ✓ Verifiable: Check your DevTools Network tab. You will see 0 outbound requests.

How to Use the UUID / GUID Generator

  1. Enter the number of UUIDs you need (1 to 100,000).
  2. Click Generate UUIDs to create cryptographically secure v4 identifiers.
  3. Review the generated UUIDs in the output editor.
  4. Copy all UUIDs to your clipboard or download them as a text file.
Advertisement

Frequently Asked Questions

What version of UUID does this tool generate?

This tool generates UUID Version 4 (v4), which uses cryptographically secure random numbers. v4 UUIDs are the most widely used format for application development.

Are these UUIDs cryptographically secure?

Yes. This tool uses the browser's native crypto.randomUUID() API, which provides cryptographic-grade randomness. The generated UUIDs are suitable for security-sensitive applications.

Can I generate UUIDs in bulk for database seeding?

Yes. You can generate up to 100,000 UUIDs in a single operation. The results can be copied to your clipboard or downloaded as a text file with one UUID per line.

What is the difference between UUID and GUID?

UUID (Universally Unique Identifier) and GUID (Globally Unique Identifier) are the same thing — different names for the same 128-bit identifier format. UUID is the standard term, while GUID is commonly used in Microsoft ecosystems.

Are the generated UUIDs stored or tracked?

No. All UUIDs are generated locally in your browser's memory. Nothing is stored, logged, or sent to any server.

Explore more ZeroData utilities

Related Tools

Timestamp Converter

Convert Unix timestamps to readable dates and back with zero data upload.

Hash Generator (Bcrypt/SHA)

Generate Bcrypt, SHA-256, and MD5 hashes locally. Never send passwords over the network.

Password Generator

Generate cryptographically secure passwords in your browser. No passwords are transmitted or stored anywhere.

© 2026 ZeroData Tools. All rights reserved.