UUID Generator
Generate UUIDs in bulk
Free forever — no sign-up, nothing uploaded. Files never leave your device.
UUID Generator
Generate UUIDs in bulk
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About this tool
Create version-4 UUIDs, with options for uppercase and hyphen-free variants.
The BrainCoder UUID Generator creates Universally Unique Identifiers (UUIDs) also known as GUIDs (Globally Unique Identifiers). UUIDs are 128-bit values that are practically guaranteed to be unique across all devices and all time — the probability of a collision is lower than being struck by lightning twice. This tool generates UUID v4 (random) identifiers with one click.
UUID v4 is the most commonly used version for database primary keys, session identifiers, transaction IDs, API request tracking, and distributed systems where coordination between nodes is impractical. Each UUID is a 36-character string in the standard format: 8-4-4-4-12 (e.g., 550e8400-e29b-41d4-a716-446655440000).
Our generator uses the browser's cryptographic random number generator to ensure each UUID is truly random and unpredictable. You can generate single UUIDs or batch-generate up to 100 at once. No UUIDs are stored or transmitted — they're created and displayed locally.
Key features
Everything you get with UUID Generator — no premium upsell.
UUID v4 generation using cryptographic randomness
Generate single UUIDs or batch up to 100
Standard 8-4-4-4-12 format output
One-click copy for individual UUIDs
Copy all generated UUIDs at once
Zero server interaction — fully client-side
How to use UUID Generator
Follow the steps below to use the tool.
- 1
Click Generate
Click the 'Generate' button to create a new UUID v4. A unique 36-character identifier will appear instantly.
- 2
Generate batch if needed
If you need multiple UUIDs, set the quantity (1-100) and click 'Generate Batch' to create them all at once.
- 3
Copy the UUID
Click the copy button next to any UUID to grab it for use as a database ID, session token, or unique identifier in your application.
- 4
Clear and regenerate
Click 'Clear' to remove generated UUIDs and start fresh. Each generation produces completely new, unique identifiers.
Still free, still private — your files never leave your device.
Launch UUID GeneratorFrequently asked questions
Quick answers before you launch the tool.
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