EN
ENARDEESFAFRHEHIIDITJAKONLPLPT-BRRORUTHTLTRUKVIZH

General dev

UUID v4 Generator

Runs locally

Use UUID v4 Generator

What it does

Generate up to 1000 random version 4 UUIDs at once with the browser's cryptographic random generator, in standard, no-hyphen, uppercase or URN format.

It runs entirely in your browser: nothing you enter is uploaded.

Example

Default settings

Input
Count 10, Standard format
Output (captured 2026-10-20)
67dcc00d-2538-4037-87a3-673470a55f1e
8037ad90-8861-4020-9b83-6b9e07b7fd54
2588c7fa-5bfa-4a61-8633-735115cd9248
13e47449-c914-4705-8283-33bfa9ec6f87
f86a14d5-b966-48cb-ab92-17c496bfcd28
6b7f4c47-43e9-4e11-9d24-d0994c6bc347
74caaf25-487e-4493-bfbd-542a0eea9a1d
c8255920-ad30-461b-84b2-acabe9e1717c
bd47e53a-bbe0-42d5-96a3-253c2133c3f6
0b66b6f9-c792-43cb-8b91-419eb6551b17

Gives ten UUIDs such as 3b241101-e2bb-4255-8caf-4136c566a962: the third group always starts with 4 (the version) and the fourth with 8, 9, a or b (the variant).

FAQ

How unique are these UUIDs?

Each has 122 random bits from crypto.getRandomValues, so a collision is practically impossible even across billions of IDs. The other 6 bits are fixed: the version digit 4 and the variant bits.

Can I use a UUID as a secret or sort by it?

A v4 UUID is random, but it is meant as an identifier and often ends up in logs and URLs; for secrets, API Key & Token Generator lets you choose the length and alphabet. These UUIDs are not time-ordered; ULID Generator makes sortable IDs.

Are the UUIDs stored or sent anywhere?

No. They are generated in your browser, not uploaded and not recorded.

  • Bulk UUID v4 Generator

    Up to 1,000 random UUID v4 values at once: standard, no hyphens or upper case; copy or download as .txt.

  • ULID Generator

    Up to 500 ULIDs at once: 26-character, time-sortable identifiers in Crockford Base32.

  • API Key & Token Generator

    Random API keys and tokens, 8-256 characters, hex, alphanumeric or symbol alphabets, optional prefix.

  • Password Generator

    Random passwords from letters, digits and symbols via crypto.getRandomValues.

  • Text Hash Generator

    SHA-1, SHA-256, SHA-384 and SHA-512 digests of text (UTF-8) with the Web Crypto API.

  • llms.txt Generator

    Generate an llms.txt Markdown file (llmstxt.org proposal) from your site name, summary and key page links.

Browse all 161 tools