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UUID Generator Online — Free, Instant, No Login

Generate v1, v3, v4, v5, v6, v7 UUIDs · Bulk export · Validate · Inspect · Batch check

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Generate secure UUIDs online — no installation, no account, works in any modern browser. Supports all standard UUID versions (v1 through v7). Copy a single UUID in one click or generate 1000 in bulk. Session history saves your last 50 generated UUIDs.

Configuration
UUID Version
🎲 Cryptographically random — most common choice
1
Format Options
Export As
Ctrl + Enter to generate
Output · Generated in 0.1ms 
961b41d6-ab0c-4e96-b705-65a9ff09ba76
1 UUIDs36 chars0.04 KB
🎯 Collision Probability (v4) SAFE
< 1 in 10³⁰probability of collision in 1 UUID
UUID v4 has 2¹²² ≈ 5.3 × 10³⁶ possible values. At 1 UUIDs, collision risk is effectively zero.
Ctrl+Enter Generate/RunCtrl+Shift+C Copy OutputCtrl+L ClearCtrl+S DownloadH Toggle History

Frequently Asked Questions

Does this UUID generator work offline?

Yes — once the page is loaded, all UUID generation runs entirely in your browser using the Web Crypto API. No internet connection is needed to generate UUIDs. No data is ever sent to a server.

How do I generate a UUID in one click?

Click the "Generate UUID" button or press Ctrl+Enter. Your UUID appears instantly in the output panel. Click the "Copy All" button (or Ctrl+Shift+C) to copy it to clipboard. The tool confirms the copy with a "✅ Copied!" message for 2 seconds.

Can I generate UUID in uppercase format?

Yes — check the "UPPERCASE" format option in the left panel. The output will switch to 550E8400-E29B-41D4-A716-446655440000 style. You can combine this with other format options like braces or no-hyphens.

What is the Session History feature?

The Session History panel (toggle with H key or click the History button) stores the last 50 UUIDs generated in your current browser session. Click "Copy" on any history entry to re-copy that UUID. History is cleared when you refresh or close the tab.

Can I remove hyphens from generated UUIDs?

Yes — check the "No Hyphens" format option. Output changes from 550e8400-e29b-41d4-a716-446655440000 to 550e8400e29b41d4a716446655440000. This 32-character hex string is useful for compact storage in databases that do not support native UUID types.

Does this tool support the URN UUID format?

Yes — check the "URN prefix" format option (only available when hyphens are enabled). Output becomes urn:uuid:550e8400-e29b-41d4-a716-446655440000 — the RFC 2141 URN representation used in XML, RDF, and some API systems.