UUID Generator Online – Generate UUIDs Instantly & in Bulk
The fastest free online UUID v4 generator. Create 1 to 5,000 UUIDs at once. Copy to clipboard or download a TXT file — no sign-up required.
UUID v4 Generator
Leave quantity empty (or enter 1) to generate a single UUID. Enter up to 5,000 for bulk generation.
Generated UUIDs
Generating Bulk UUIDs...
Please wait while we create and package your secure file.
Your file is ready!
The file contains one UUID per line, ready to use in your project.
A UUID generator is an online tool that creates universally unique identifiers (UUIDs) for use in databases, APIs, and distributed systems.
This free UUID generator online lets you quickly generate UUID v4 values for your applications. Whether you need a single UUID or a bulk UUID generator for thousands of records, this tool helps you create secure and unique identifiers instantly.
How to Generate UUIDs Online
Create and download universally unique identifiers in three simple steps.
Enter a quantity
Leave the quantity field blank or enter any number from 1 to 5,000. Need just one? Hit Generate UUID without entering a count.
Click Generate
Click the blue Generate UUID button. For 1–100 UUIDs they appear inline; for more than 100, a secure file link is created instantly.
Copy or Download
Copy individual UUIDs or
all at once, or download the full list as a clean .txt file — one UUID per
line.
What Is a UUID?
A UUID (Universally Unique Identifier), also called a GUID (Globally Unique Identifier), is a 128-bit number used to uniquely identify information in computer systems without requiring a central authority.
UUID v4 values are completely random and look like this:
They follow the format xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
where the 4 denotes
version 4 and y is one of
8, 9, a, b.
Common Use Cases
Database Primary Keys
Replace auto-increment integers for globally unique, merge-safe IDs across distributed databases.
Session & Token IDs
Secure, unpredictable session tokens, API keys, and OAuth flow identifiers.
Test Data Generation
Quickly seed test databases or populate fixture files with unique identifiers for QA automation.
Distributed Systems
Generate IDs across microservices and nodes without coordination — guaranteed uniqueness without a server.
Why Bulk UUID Generation Matters
Manually creating hundreds or thousands of UUIDs is time-consuming and error-prone. Our bulk UUID generator lets you create up to 5,000 UUIDs in one click and download them instantly.
Instant generation
Generate thousands of UUIDs in milliseconds
with server-side Python's cryptographically secure uuid.uuid4().
One UUID per line
Download a clean TXT file with one UUID per line — ready to import into spreadsheets, databases, or scripts.
Private download link
Download links are protected with a secret hash — your UUID file is not publicly exposed or guessable.
Always free
No account, no credit card, no limit on how many times you use it. Completely free for developers everywhere.
UUID Versions Explained
| Version | Generation Method | Best For | Notes |
|---|---|---|---|
| UUID v1 | Time + MAC address | Sortable chronological IDs | Leaks MAC address; privacy concern |
| UUID v3 | MD5 hash of namespace + name | Deterministic identifiers | Not recommended; MD5 is weak |
| UUID v4 ⭐ | Random numbers (CSPRNG) | General purpose — most popular | Highly random; extremely collision-resistant |
| UUID v5 | SHA-1 hash of namespace + name | Namespace-based IDs | Deterministic reproduction from same input |
Frequently Asked Questions
Related searches: uuid generator, uuid generator online, generate uuid online, uuid v4 generator, guid generator, random uuid generator, bulk uuid generator, create uuid list, unique id generator online.
Explore More Free Tools
Explore other free online tools for developers, including generators, formatters, and utilities.