What does this tool do?
UUID Generator produces unique identifiers (UUID/GUID) with a practically zero chance of collision. They are used for database primary keys, object IDs in distributed systems, session tokens and idempotency keys. Version 4 (random) UUIDs are generated locally in your browser.
How to use it
- Choose the required options or length.
- Generate the secure result.
- Copy and store the result safely.
What is a UUID v4?
A UUID v4 is a 128-bit identifier with 122 random bits, which makes two IDs colliding astronomically unlikely even without any central coordination. That is why it is ideal for distributed systems where many servers or clients can mint IDs at the same time.
Frequently asked questions
Can two UUIDs be the same?
In theory yes, in practice no. A v4 UUID has 2^122 possible values; even generating billions, the chance of a collision is negligibly small.
What is the difference between UUID v4 and v1?
v1 is based on a timestamp and MAC address — sequential but can leak hardware info. v4 is fully random and more privacy-safe; v4 is recommended for most applications.
Is UUID Generator free?
Yes. UUID Generator and all 300+ tools on MagmaNex are completely free with no signup or account required.
Is my data safe?
Yes. Everything runs locally in your browser. The data you enter is never sent to a server, stored, or shared.
Does it work on mobile?
Yes. UUID Generator works on phones, tablets and desktops — no app download needed.
🔒 Privacy: everything runs in your browser, your data is never sent to a server.