UUID Generator — Bulk Generate v4, v7 & Decode Any UUID Online
Generate up to 1,000 UUIDs at once in v1, v3, v4, v5, or v7. Paste any UUID to decode its version, variant, and timestamp. Copy as JSON, download as .txt, or format with dashes, braces, or uppercase. Runs entirely in your browser — no data leaves your device.
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Frequently Asked Questions
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier that's virtually guaranteed to be unique across all systems. The standard format is 8-4-4-4-12 hexadecimal digits.
Which UUID versions can I generate?
SimplyUtils supports v1 (time-based), v3 (MD5 namespace), v4 (random), v5 (SHA-1 namespace), v7 (Unix epoch time), and Nil UUIDs.
Which UUID version should I use?
Use v4 for general-purpose unique IDs, v7 for database primary keys (time-sortable), and v5 for deterministic IDs from known inputs.
Can I validate and decode UUIDs?
Yes. Paste any UUID in the Validate & Decode tab to check validity, detect the version and variant, and extract timestamps from v1 and v7 UUIDs.
How many UUIDs can I generate at once?
You can generate up to 1,000 UUIDs at once. Copy them all, export as JSON array, or download as a .txt file.
What are namespace UUIDs (v3/v5)?
v3 and v5 UUIDs are deterministic — they hash a namespace (like DNS or URL) with a name to always produce the same UUID for the same input. v5 uses SHA-1 and is preferred over v3 (MD5).