Category: Developer tools
UUID Generator
Generate random UUID v4 values in bulk with flexible formatting
Generate 1 to 100 random UUID v4 values online. Choose hyphens and letter case, then copy the list. Everything runs locally in your browser.
0 UUID v4
The result will appear here.
Everything on this page is processed in your browser. Nothing is uploaded.
What this tool does
This UUID generator uses the browser's cryptographic random source to create version 4 UUIDs. Generate 1 to 100 at once, keep or remove hyphens, and choose lowercase or uppercase output. It does not generate other UUID versions, create namespace-based IDs or validate existing values, and no result is uploaded.
How to use it
- Choose how many UUIDs to generate, from 1 to 100.
- Select whether to keep hyphens and use uppercase letters.
- Generate the UUID v4 list and copy it.
Privacy
This tool runs entirely in your browser. Your input is never uploaded, stored or shared — closing the tab removes it.
Frequently asked questions
- What is a UUID v4?
- A UUID v4 is a 128-bit identifier made primarily from random bits. It is widely used for database keys, request IDs and distributed object identifiers.
- Can two generated UUIDs be the same?
- A collision is extraordinarily unlikely because UUID v4 has a very large random space, but no random generator can honestly promise absolute uniqueness.
- Are UUID and GUID the same?
- GUID is the name commonly used in Microsoft ecosystems for identifiers that usually share the UUID 128-bit text format. The terms are often used interchangeably.
- Can I generate UUIDs in bulk?
- Yes. Set the quantity from 1 to 100 and the tool returns one UUID v4 per line for easy copying.
- Are the generated UUIDs uploaded?
- No. Random generation, formatting and copying all happen inside the browser, so LocalTools does not receive the generated values.