UUID Generator
Generate UUIDs (v4) in bulk for free. Handy for API development and test data.
Inputs are not collected. Usage measurement requires your consent.
Done
UUID Generator
Next time, open this tool from My Tools. Only the tool list is saved in this browser, not your inputs or results.
⌥DPress Option+D anytime to toggle My Tools instantly
How to use
- 1
Set count
Choose how many UUIDs to generate.
- 2
Generate
UUIDs are generated in bulk with one click.
- 3
Copy
Copy or download the results.
Features
- Generate UUID v4 in bulk (up to 1000)
- Cryptographically secure randomness minimizes collision risk
- Copy or download results
- Free for development use
Use cases
Database primary keys
Generate candidate IDs for new rows. Foreign keys must reference an existing row.
API request IDs
Use UUIDs as request tracking IDs in your API.
Test data generation
Generate IDs for dummy data during development and testing.
Details
A UUID (Universally Unique Identifier) is an identifier designed to be unique across the world. It is widely used for database primary keys, API request IDs, and file names where uniqueness matters.
This tool generates version 4 UUIDs using cryptographic randomness in the browser. Enforce uniqueness where the IDs are stored.
Generate up to 1000 at a time, then copy or download them directly. Perfect for test data and development debugging.
FAQ
What is a UUID?
An identifier designed to be unique worldwide, used for database primary keys and API request IDs.
Can generated UUIDs collide?
v4 UUIDs have 122 random bits and can still collide. Enforce uniqueness in storage and handle conflicts there.
How many can I generate at once?
Up to 1000 at a time.
What format are the generated UUIDs?
Version 4 UUIDs in the hyphenated 8-4-4-4-12 format.
Related Tools
Password Generator
Generate secure passwords for free. Customize length and character sets.
Unix Timestamp Converter
Convert between Unix timestamps and dates. Grab the current timestamp with one click.
JSON Formatter
Format, minify, validate and unescape JSON right in your browser.
Hex & Text Converter
Convert Hex bytes and UTF-8 text in your browser. Inspect byte counts, Japanese characters and invalid UTF-8 without uploading data.
All processing happens in your browser. Your files are never uploaded.
Verified: Quantity, generation and copy behavior are maintained as regression flows
Did you know?
The odds of a UUID v4 collision are so low that generating them for longer than the age of the universe would still make it practically impossible.