How do I use the NexTools Cryptographic UUID / GUID v4 & v5 Generator Online?

Simply open the Cryptographic UUID / GUID v4 & v5 Generator Online on NexTools, enter your values or parameters in the input fields, and get instant, accurate results directly in your web browser.

Is the Cryptographic UUID / GUID v4 & v5 Generator Online tool completely free to use?

Yes, Cryptographic UUID / GUID v4 & v5 Generator Online on NexTools is 100% free with unlimited usage, zero subscriptions, and no registration or API keys required.

Does NexTools store my data when using Cryptographic UUID / GUID v4 & v5 Generator Online?

No. All calculations and operations are processed securely within your browser session or secure server requests. We never store or share your input data.

Can I use Cryptographic UUID / GUID v4 & v5 Generator Online on mobile devices?

Yes, Cryptographic UUID / GUID v4 & v5 Generator Online is fully responsive and optimized to work seamlessly across mobile phones, tablets, and desktop computers.

What is the difference between UUID v4 and UUID v5?

UUID v4 is randomly generated using 122 bits of true entropy via CSPRNG. UUID v5 is deterministic, generated by hashing a namespace UUID and a name string using SHA-1, guaranteeing the same UUID for the same input.

Cryptographic UUID / GUID v4 & v5 Generator

Generate RFC 4122 compliant UUID v4 and deterministic UUID v5 identifiers with CSPRNG in your browser.

Generated UUID RFC 4122

f47ac10b-58cc-4372-a567-0e02b2c3d479

Generation Options

UUID Version

Letter Casing

Hyphens

Bulk Generation (10–50 UUIDs)

Collision Probability of UUID v4

A Version 4 UUID has 122 random bits. The total number of possible UUIDs is $2^{122} \approx 5.3 \times 10^{36}$. To have a one-in-a-billion chance of generating a single collision, one would need to generate over 100 billion UUIDs per second for 85 years.