UUID Generator
Generate UUIDs v1, v4 and v7.
How do you generate UUIDs online, one at a time or in bulk?
Docuboxer's UUID generator produces universally unique identifiers in versions v1, v4 and v7, one at a time or hundreds in a single batch — generated entirely in your browser, with nothing requested from any server. Pick the version that fits your use case: v4 is fully random and remains the default choice for most systems; v7 is the modern time-ordered variant that sorts chronologically and plays nicely with database indexes; v1 encodes a timestamp and node identifier for legacy compatibility. Set how many you need, generate, and copy the whole list to the clipboard or download it as a text file. Because generation is local, the IDs are created with your browser's cryptographic randomness and never exist anywhere but your machine — and the tool keeps working offline once the page has loaded. Free, no signup, no limits.
How to use UUID Generator
- Select the UUID version you need: v1 (time and node based), v4 (random) or v7 (time-ordered).
- Set how many identifiers you want to generate at once — from one to hundreds.
- Click generate, then copy the full list to the clipboard or download it as a text file.
Common use cases
Primary keys for distributed databases
Generate random v4 UUIDs to use as primary keys in distributed database tables, avoiding collisions between servers without any central coordination.
Session tokens and request tracing
Create unique identifiers for user sessions, correlation IDs in distributed logs, or trace tokens in microservices that need end-to-end tracking.
Sortable IDs for modern schemas
Use v7 UUIDs where insertion order matters: they sort chronologically, which keeps database indexes compact and range queries fast.
Test data and fixtures
Generate a batch of UUIDs to populate fixtures, mock APIs and seed data without writing a script for it.
IDs for documents and assets
Assign collision-proof names to files, uploads and records across systems that were never designed to coordinate with each other.
Frequently asked questions
How do I generate a UUID online?
Pick a version (v4 if unsure), choose the quantity, and click generate. The identifiers are created locally in your browser, ready to copy or download — free, no signup, no quota.
What's the difference between UUID v1, v4 and v7?
UUID v1 is based on the timestamp and the device's node identifier. UUID v4 is completely random. UUID v7 is the most modern version — chronologically sortable and optimized for database indexes.
Which UUID version should I use for database keys?
v7 if your stack supports it: being time-ordered, it avoids the index fragmentation that random v4 keys cause on inserts. v4 remains a perfectly safe default everywhere else.
How likely is it that two generated UUIDs collide?
Astronomically unlikely for v4: you would need to generate a billion UUIDs per second for about 36 years to reach a 50% chance of a single collision.
Can I generate many UUIDs at once?
Yes — set the quantity and generate the whole batch in one click, then copy the list or download it as a text file. Handy for seeding databases and preparing test data.
Are the UUIDs generated on a server?
No. They are generated in your browser using its cryptographic randomness — no server call, no logging, and it works offline once the page has loaded. Nobody but you ever sees them.