Free UUID generator — produce RFC 4122 v4 UUIDs in bulk for databases, APIs, primary keys, and tests.
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The QuickToolz UUID Generator produces cryptographically-random UUID v4 identifiers (RFC 4122). Generate one UUID or thousands at once, with optional uppercase, no-hyphen, or braced formats. Perfect for database primary keys, API request IDs, distributed-system identifiers, and test fixtures.
UUID v4 uses 122 bits of randomness, making collisions astronomically unlikely (~1 in 2^61 after generating one billion per second for 85 years). It’s the most widely used UUID variant in modern systems — Postgres, MongoDB, Stripe, Slack, and most cloud APIs.
Standard: a3b1f8d4-2c9e-4f87-9b1c-9d6f8e2a7c3b
Uppercase: same with capital A–F
No hyphens: 32-char compact form
Braced: {...} Windows GUID style
Everything you need, nothing you don’t. Built for speed and simplicity.
Cryptographically-secure random UUIDs using Web Crypto.
Produce 1 or thousands at once.
Standard, uppercase, no-hyphen, or braced.
Generated locally; nothing is sent to a server.
Everything you need, nothing you don’t. Built for speed and simplicity.
Choose 1, 10, 100, or any count of UUIDs to generate.
Standard, uppercase, no-hyphen, or braced.
Generate then copy all UUIDs to clipboard with one click.
Got questions? We’ve got answers. Common questions about UUID Generator.
Generator options
Pick a UUID version and formatting — output updates instantly.
UUIDs are generated locally usingcrypto.getRandomValuesand never leave your browser.
Generated UUIDs
Tap copy to save them to your clipboard and session history.
v4 · 0 UUIDs
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