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Step 1
Select how many UUIDs you want to generate (up to 100).
UUID Generator Online
Use NewTools to generate UUID v4 values directly in your browser. Uses browser crypto to generate one or many random UUID v4 identifiers.
Random Identifiers. Instantly generate UUID v4 strings natively in your browser.
No installation
Fast processing
Browser friendly
Privacy-aware
Features
v4 UUID Generation: Creates random version 4 UUIDs following standard RFC specifications.
Web Crypto API: Uses standard browser cryptography functions (crypto.randomUUID).
Batch Generation: Generate up to 100 unique identifiers at a time.
Case Control: Choose between lowercase or uppercase formatted outputs.
How It Works
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Step 2
Toggle uppercase mode if desired.
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Step 3
Click generate and copy your unique identifiers.
Common Use Cases
Database keys
Generate safe, non-colliding primary keys for development databases.
Mock data creation
Populate JSON test payloads with valid unique identifiers.
Session tracking IDs
Generate random strings for temporary application state tracking.
Tips & Best Practices
Tip 1
UUIDs are generated using the browser's native random number generator.
Tip 2
Use uppercase output if your database system expects strict casing for GUIDs.
UUID Generator
Locally Generated
By utilizing the native Web Crypto API inside your browser, these UUIDs are random and never logged on external servers.
Frequently Asked Questions
Does this tool generate UUID v1 or v5?
No, this tool exclusively generates Version 4 (Random) UUIDs.
Are the generated IDs saved?
No. Processing is completely local to your browser and IDs are never transmitted or stored by our servers.
Can I generate thousands of UUIDs at once?
For browser performance, batch generation is capped at 100 UUIDs per request.