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.
Everything you need, nothing you don’t. Built for speed and simplicity.
Choose 1, 10, 100, or any count of UUIDs to generate.
Got questions? We’ve got answers. Common questions about UUID Generator.
Generated locally; nothing is sent to a server.
Standard, uppercase, no-hyphen, or braced.
Generate then copy all UUIDs to clipboard with one click.
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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