UUID Generator

Developer Quick Tips

• Generate 1 to 10,000 random UUIDs at once using crypto.randomUUID() in your browser; output one per line for SQL seeds or spreadsheets.
• Download as uuids.txt or copy to clipboard instantly. All generation stays local in your browser, no server upload.
• Use UUID v4 for database primary keys, API resource IDs, session tokens, test fixtures, and distributed system identifiers.
• Pair with UUID Validator to check format and version nibbles after bulk generation.
• Generate UUIDs offline; no account, no login, no data persistence after tab closes.

Frequently asked questions

How do I generate random UUID v4 online?

Enter a count from 1 to 10,000 and click generate. UUID Generator creates random UUIDs using crypto.randomUUID() in your browser. Output one per line for easy paste into databases, APIs, or config files.

Can I bulk generate UUID v4 values?

Yes. Set Count to any value from 1 to 10,000 and generate all at once. Each UUID is created locally in your browser and output one per line for import into spreadsheets, SQL seeds, or code.

What is UUID v4?

UUID v4 is a 128-bit random identifier formatted as a hyphenated lowercase string (e.g., 550e8400-e29b-41d4-a716-446655440000). RFC 4122 compliant and ideal for distributed systems where uniqueness is needed without central coordination.

Does UUID Generator upload my data to servers?

No. UUID Generator runs entirely in your browser using crypto.randomUUID(). Generated UUIDs and any input never leave your device or upload to DevToolMate servers.

What are UUIDs used for?

UUIDs are used as database primary keys, API resource identifiers, session tokens, test fixtures, migration seeds, and anywhere you need a unique identifier without a central registry.

Is UUID Generator free and do I need an account?

Yes, UUID Generator is free with no account required. Processing stays on your device and generated UUIDs are cleared when you close the tab.

Can I validate UUID format after generation?

Yes. Use the UUID Validator tool to check format and version nibbles after bulk generation. Both tools run locally in your browser with no upload.

Related tools

• UUID Validator: Free UUID and GUID validator: check valid UUIDs in RFC 4122 format, version/variant nibbles, bulk validate up to 10,000 IDs locally. No upload, no account.
• Random String Generator: Generate random strings online in your browser with crypto.getRandomValues. Choose hex, alphanumeric, or URL-safe alphabets. Free, no upload, no account required.