🆔 UUID Generator
Generate UUID v4, time-based UUID, ULID and NanoID in bulk with secure browser randomness.
ID type
🔐 IDs are generated with the Web Crypto API directly in your browser. Nothing is sent to 0Appz or any third party.
📋 Generated IDs
0📋
How to use this tool
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1. Enter your input
Type, paste or drop your file above.
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2. Run in browser
Your files never leave your device.
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3. Download result
Save or copy instantly, no sign-up.
Overview
UUID Generator - Free UUID v4, ULID & NanoID Generator generates unique identifiers directly in your browser: UUID v4 (128-bit random), time-based UUID v1, ULID (26 characters, sortable by creation time) and NanoID (21-character URL-safe strings). Choose how many you need — up to 1000 per click — then copy the list or download it as a .txt file. All values come from the Web Crypto API, the same cryptographically secure source your browser uses for TLS. Nothing is sent to any server, no account is required, and the tool keeps working offline. Perfect for database keys, API tokens, test fixtures and distributed systems.Frequently asked questions
Are these UUIDs random and secure? +
Yes. The UUID Generator - Free UUID v4, ULID & NanoID Generator uses the Web Crypto API (crypto.getRandomValues), the same source of randomness used for TLS and cryptography in your browser.
What is the difference between UUID v4, ULID and NanoID? +
UUID v4 is 128-bit random with hyphens. ULID is 26 characters, sortable by creation time. NanoID is a short 21-character URL-safe identifier.
Is there a limit on how many IDs I can generate? +
You can generate up to 1000 IDs per click. Press regenerate or increase the count for more.
Is this tool free and private? +
Yes — 100% free, no sign-up. Everything is generated locally in your browser and never sent to any server.