What are some edge cases for UUID Generator?

Generating thousands of UUIDs simultaneously without blocking the browser thread. Ensuring cryptographic randomness via window.crypto instead of Math.random().

Is this UUID Generator safe for sensitive data & credentials?

Yes, 100%. All processing runs client-side in your local browser memory. No text, tokens, payloads, or logs are ever transmitted to any remote server or analytics engine.

Can I use UUID Generator offline without internet?

Yes. Because this tool runs strictly on client-side JavaScript with zero external API calls, once the web application is loaded in your browser it will continue working offline.

How does URL state sharing work?

When you click Share Payload, your state is encoded directly into a URL hash fragment (#data=...) without storing anything on a database server.

UUID Generator Online (v4) — DevScratchpad

Generate secure UUIDs (v4) online instantly. Free, offline bulk UUID generator tool.

How to use

Select the number of UUIDs you wish to generate (e.g., 1, 10, or 100).
Click 'Generate' to instantly create cryptographically secure, random v4 UUIDs using the browser's native Crypto API.
Choose your preferred format (hyphens, no hyphens, or uppercase).
Click the copy button to grab your unique identifiers.

Important Considerations

Generating thousands of UUIDs simultaneously without blocking the browser thread.
Ensuring cryptographic randomness via window.crypto instead of Math.random().

Privacy Notice: This tool is strictly client-side. All processing runs in your local browser memory using JavaScript. No text, tokens, payloads, or logs are ever transmitted to any remote server or analytics engine. You can even use this tool completely offline.

UUID / ULID Generator

UUID / ULID / NanoID Generator (Offline & Secure)

How to use

Important Considerations

Keyboard Shortcuts

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