UUID Generator
Generate UUID v4, v7, or Nil identifiers in bulk — copy individually or download as a text file. Instant, free, browser-based.
✓ Free · No signup · Works in browser · 100% private
Why use this tool
Fast, Reliable UUID Generation
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UUID v4 (Random)
Uses crypto.randomUUID() for 122 bits of cryptographic randomness. Ideal for general-purpose identifiers.
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UUID v7 (Time-ordered)
Timestamp-prefixed UUIDs that sort chronologically — ideal as database primary keys without index fragmentation.
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Nil UUID
Generate the all-zeros UUID for use as a null placeholder in APIs and database fields.
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Bulk Generate
Generate up to 1000 unique UUIDs in a single click. Copy all or download as a .txt file.
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One-click Copy
Each UUID has an individual copy button. Copy the entire list with a single "Copy All" action.
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100% Client-side
UUIDs are generated in your browser. Nothing is sent to servers — private and always available offline.
How it works
Generate UUIDs in 3 Easy Steps
1
Choose UUID version and count
Select v4 (random), v7 (time-ordered), or Nil. Enter how many UUIDs you need (1–1000).
2
Click Generate
Your UUIDs appear instantly in a scrollable list. Each entry has an individual "Copy" button.
3
Copy or download the list
Click "Copy All" to copy the full list to clipboard, or "Download TXT" to save as a text file.
FAQ
Frequently Asked Questions
What is the difference between UUID v4 and v7?
UUID v4 is randomly generated with 122 bits of randomness — great for general purpose use. UUID v7 is time-ordered: the first 48 bits encode the current Unix timestamp, making v7 UUIDs sortable by creation time. This is better for database primary keys as it avoids index fragmentation.
What is a Nil UUID?
A Nil UUID is
00000000-0000-0000-0000-000000000000 — all zeros. It is used as a placeholder or null value in APIs and databases when you need to represent "no UUID" or an uninitialized identifier.Are the generated UUIDs truly unique?
UUID v4 uses cryptographically random bits via crypto.randomUUID(), making collisions astronomically unlikely. You would need to generate over a quintillion (1018) UUIDs before expecting a single duplicate. In practice, they are treated as globally unique.
Can I generate UUIDs in bulk?
Yes! Enter any count from 1 to 1000 and click Generate. You can then copy individual UUIDs using their inline Copy button, copy all at once with "Copy All", or download the full list as a
.txt file.What are UUIDs used for?
UUIDs are used as unique primary keys in databases, identifiers for objects in distributed systems, session tokens, file names, API resource IDs, and anywhere a collision-resistant unique ID is needed without requiring a central authority to assign it.
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