UUID Generator
About UUID v4
Universally Unique Identifiers (RFC 4122). Version 4 uses cryptographic randomness - the probability of collision is astronomically low (1 in 2¹²²). Format: 8-4-4-4-12 hexadecimal characters.
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Generate any number of version 4 UUIDs (Universally Unique Identifiers) from 1 to 1,000 in one click. Version 4 UUIDs are generated using cryptographic randomness (crypto.randomUUID() or a crypto-quality fallback), making collisions astronomically unlikely (1 in 2¹²²). Toggle Uppercase for all-caps hex output. Toggle Hyphens off for 32-character compact format. Copy all UUIDs to clipboard at once, or click individual UUIDs to copy them. Download the entire list as a plain text file. Session history keeps your last 50 generated UUIDs available. 100% browser-based - no server calls.
How to Use
- 1Set the Quantity (1–1,000) for how many UUIDs to generate
- 2Toggle Uppercase or turn off Hyphens as needed
- 3Click Generate - all UUIDs appear in the list below
- 4Click any UUID in the list to copy it individually
- 5Click Copy All to copy all UUIDs, or Download .txt to save them as a file
Features
- Generates UUID v4 using cryptographic randomness (crypto.randomUUID)
- Bulk generation: 1 to 1,000 UUIDs in one click
- Uppercase toggle for all-caps hex output
- Hyphens toggle for compact 32-character format
- Copy all UUIDs at once or click individual UUIDs to copy them
- Download the list as a .txt file
- Session history keeps last 50 generated UUIDs
- 100% browser-based
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