UUID (Universally Unique Identifier) is a 128-bit identifier formatted as 8-4-4-4-12 hexadecimal groups. Used to uniquely identify database records, API resources, session tokens, etc.

What is the difference between UUID v4 and v1?

UUID v4 is fully random (except 6 version/variant bits). UUID v1 embeds the current timestamp, making it sortable by creation time but potentially revealing the machine MAC address.

Are the generated UUIDs truly unique?

UUID v4 has 122 random bits, giving 2^122 possible values. The probability of collision is astronomically low — effectively unique for all practical purposes.

Is this cryptographically secure?

Yes. We use the Web Crypto API (crypto.getRandomValues) for generation, the same standard used by browsers for TLS.

A short ID is a 12-character URL-safe base64 string generated from 9 random bytes. Useful when you need a compact unique identifier.

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UUID Generator

Generate UUID v4, v1-style, nil UUIDs and short IDs in bulk.

Options

Version

Count: 5

Uppercase

5 UUIDs

18f691bb0-dedf-4efb-9287-8e77ef271a47

2b1c3c5bd-91f2-4b46-93e8-bbe46dd8b6ec

3b094a8f4-aa6a-44dc-971d-8d9de566eccd

49b077fca-9caf-42d5-bf29-1945d8a2d656

5be32b31f-d0b1-403f-9447-e2a02d0280d8

UUID Generator कसरी प्रयोग गर्ने

1
Select UUID version (v4, v1-like, short, or nil).
2
Set how many to generate (1-20).
3
Toggle uppercase if needed.
4
Click Generate.
5
Click individual copy buttons or "Copy all".

UUID Generator बारेमा

Generate cryptographically random UUIDs instantly. Choose UUID v4 (fully random), v1-like (time-based prefix), nil UUID (all zeros), or short 12-character IDs. Generate 1–20 at a time. Toggle uppercase, copy individual or all at once.

UUID Generator बारेमा बारम्बार सोधिने प्रश्नहरू

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