UUID Generator
Generate cryptographically strong UUID v4 identifiers — single or up to 100 at once. All generation happens locally in your browser using the Web Crypto API (crypto.randomUUID()), so your data never leaves your device. Free, instant, and no account required.
How to Use the UUID Generator
- 1
Set the quantity
Enter a number from 1 to 100 in the count field if you want multiple UUIDs, or leave it at 1 for a single UUID.
- 2
Click Generate
Press the Generate button to produce your UUIDs instantly.
- 3
Copy your UUIDs
Click Copy to copy a single UUID, or use Copy All to copy the entire batch to your clipboard.
- 4
Paste wherever needed
Paste the UUID(s) into your database, config file, test fixture, or wherever you need a unique identifier.
Key Features
Cryptographically Secure
Uses crypto.randomUUID() with the browser's CSPRNG — 122 bits of randomness per UUID.
Bulk Generation
Generate up to 100 UUIDs in one click — useful for seeding databases and test fixtures.
Instant & Private
All generation is local — no server round-trips, no data collection, no latency.
Pro Tips
UUID v4 has 122 bits of randomness, making the probability of a collision approximately 1 in 5.3 × 10^36 — effectively impossible in practice.
GUIDs (used in Windows/.NET/SQL Server) are the same format as UUIDs — a v4 UUID from this tool is a valid GUID.
For database primary keys, consider using UUID v7 (time-ordered) if your database supports it — it is more index-friendly than random v4.
Privacy Note
All processing in this tool runs entirely in your browser — no data is transmitted to any server. Your input is never logged, stored, or shared. This tool is free to use with no account or registration required.
Frequently Asked Questions
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Your input is processed locally in your browser and is never stored, transmitted, or shared with any server. See our Privacy Policy.