UUID Generator
Generate cryptographically secure, random UUID v4 identifiers in bulk, instantly, entirely inside your browser. No signup, no backend, no data ever leaves your device.
✅ Reviewed by Rashid Amin, Founder of NexaTools 🕒 Last Updated: July 2026
UUID Options
🆔 Client-Side OnlyFree Online UUID Generator
The NexaTools UUID Generator creates random version 4 UUIDs (universally unique identifiers) directly in your browser using the cryptographically secure Web Crypto API. Generate a single ID or hundreds at once for database keys, session tokens, test data or API mocks.
Every UUID is generated locally on your device — no identifiers are logged or sent to a server, so you can safely generate IDs for sensitive systems.
How to Generate UUIDs
Set your options
Choose quantity, letter case, and whether to include hyphens.
Click Generate
Instantly get a fresh batch of random UUID v4 values.
Copy them all
Use Copy All to grab the entire list in one click.
Why Use This UUID Tool
Cryptographically secure. Uses the browser's crypto.getRandomValues API.
Bulk generation. Create up to 500 UUIDs at once.
Flexible format. Upper/lowercase, with or without hyphens.
Always free. No signup, no limits.
Who Should Use This Tool
This UUID generator is built for anyone who needs unique identifiers for records, keys, or objects. That includes:
Developers who need unique IDs for database records, test data, or object keys.
Backend and API engineers generating identifiers for sessions, requests, or tracking references.
Students and hobbyists learning how UUIDs work and why they're used instead of sequential IDs.
Anyone without dev tools installed who needs a batch of unique IDs without writing a script.
Common Use Cases
Database primary keys. Generate unique identifiers for new records instead of relying on auto-increment IDs.
Test data and fixtures. Quickly create a batch of unique IDs for testing or seeding a development database.
API keys and tokens. Generate a unique reference ID for a session, request, or tracking purpose.
Learning and documentation. Produce example UUIDs to use in tutorials, docs, or code samples.
Common Problems & Troubleshooting
Copy button doesn't seem to work. Some browsers block clipboard access until you interact with the page first; click anywhere on the page, then try Copy again.
I need more than 500 UUIDs at once. The quantity field caps at 500 per batch; run the generator multiple times if you need more.
I need the hyphens removed or the case changed. Use the Format and Case options above the Quantity field before generating — they apply to the whole batch.
Nothing happens when I click Generate. Make sure the Quantity field has a valid number between 1 and 500.
Frequently Asked Questions
Generate UUIDs in Seconds
Set your quantity and format, copy the whole batch instantly.