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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Browse filesdocument.pdf
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report.pdf
860 KB
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Local processing
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About this tool
Create version-4 UUIDs, with options for uppercase and hyphen-free variants.
The BrainCoder UUID Generator creates UUID v4 (random) identifiers in your browser. UUIDs — sometimes called GUIDs — are 128-bit identifiers with 122 random bits, and the chance any two v4 UUIDs collide is about 1 in 2^122, so generated values are practically unique without any central coordination. That makes them ideal for database primary keys, session and transaction IDs, API request tracing, and distributed systems.
Each UUID follows the standard 8-4-4-4-12 format (36 characters, e.g. 550e8400-e29b-41d4-a716-446655440000). Use the Count slider to generate 1 to 100 at once, and switch to Uppercase or No hyphens (32 characters) variants if your system expects them. The list updates the moment you change any option; Generate re-rolls a fresh batch, and Clear empties the list.
Values are produced with the browser's cryptographic random source (Web Crypto) and never leave your device — nothing is uploaded or stored by the tool.
Key features
Everything you get with UUID Generator — no premium upsell.
UUID v4 generation using the browser's cryptographic random source
Count slider generates 1 to 100 UUIDs per batch
Standard 8-4-4-4-12 format, with Uppercase and No hyphens variants
One-click copy for individual UUIDs
Copy all generated UUIDs at once
Zero server interaction — fully client-side, nothing uploaded
How to use UUID Generator
Follow the steps below to use the tool.
- 1
Choose a count
Drag the Count slider (1–100) to set the batch size. The list regenerates immediately, so the number of UUIDs shown always matches the slider.
- 2
Apply variants
Toggle Uppercase or No hyphens to reformat the output (36-character hyphenated form, or 32 uppercase hex digits with both options on).
- 3
Generate or re-roll
Click 'Generate' to replace the list with a fresh random batch. Every click produces completely new identifiers.
- 4
Copy the UUIDs
Click the copy button next to any UUID for a single value, or 'Copy all' to copy the whole batch as one value per line. Use 'Clear' to empty the list.
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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