A UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. The tool generates UUID v4 (random) by default.

Is this UUID generator free?

Yes, it is completely free and runs entirely in your browser with no installation required.

Is the generation secure and random?

Yes. IDs are generated locally using cryptographically secure random methods (crypto API). No data is sent to any server.

What identifier formats does it support?

The tool supports UUID v1, v4, v7, GUID, ULID, NanoID, KSUID, CUID, and CUID2.

Can I generate multiple IDs at once?

Yes, you can specify any number between 1 and 1000 IDs to generate in a single batch.

What are UUIDs used for?

UUIDs are commonly used as database keys, session identifiers, transaction IDs, and for uniquely tagging objects in distributed systems.

UUID & ID Generator – Create UUID, GUID, KSUID, NanoID, ULID, CUID

📋 Copy All 💾 CSV 💾 Excel 💾 JSON 💾 SQL 💾 XML

✅ IDs generated successfully

Generate universally unique identifiers (UUID, GUID, KSUID, ULID, NanoID, CUID) instantly in your browser – no uploads, no signups. Choose from nine identifier formats, generate up to 1000 IDs at once, and export as CSV, Excel, JSON, SQL, or XML. Perfect for database keys, API tokens, distributed systems, and testing – all processed locally with cryptographic randomness.

Why use a UUID / unique ID generator?

Generate database primary keys (UUID, KSUID, ULID) for SQL or NoSQL
Create API request IDs, session tokens, or correlation IDs
Produce sortable, time‑ordered identifiers for event sourcing (KSUID, ULID, UUID v7)
Generate compact, URL‑safe IDs for links or short URLs (NanoID)
Bulk‑generate test data for development or load testing (up to 1000 IDs)

How to generate unique IDs – 3 simple steps

Select an ID format – choose from UUID v1/v4/v7, GUID, ULID, NanoID, KSUID, CUID, or CUID2.
Set the quantity – pick how many IDs you need (1 to 1000).
Generate and export – click “Generate Unique IDs”, then copy the list or export as CSV, Excel, JSON, SQL, or XML.

Unique ID generator – features you’ll love

✅ 9 ID formats – UUID (v1, v4, v7), GUID, ULID, NanoID, KSUID, CUID, CUID2
✅ Bulk generation – create up to 1000 IDs in one click
✅ Cryptographically secure – uses browser’s crypto API (UUID v4, NanoID, etc.)
✅ Sortable / time‑ordered options – UUID v7, ULID, KSUID
✅ Multiple export formats – CSV, Excel (.xlsx), JSON, SQL (INSERT statements), XML
✅ One‑click copy – copy all generated IDs to clipboard
✅ 100% browser‑based – no data uploaded, no server

Why DataFrog’s ID generator stands out

All popular formats in one place – no need to switch between different tools for UUID, NanoID, or KSUID.
Developer‑friendly exports – SQL INSERT statements ready for databases, JSON for APIs, XML for configs.
Sortable IDs for distributed systems – ULID, KSUID, and UUID v7 keep order over time.
No signup, no watermarks – completely free and private.

Supported identifier formats

UUID v1 – timestamp‑based, MAC address derived
UUID v4 – random, most common for general use
UUID v7 – time‑ordered, sortable, millisecond precision
GUID – Microsoft’s 128‑bit identifier (identical to UUID)
ULID – 26‑character sortable, URL‑safe
NanoID – compact, URL‑safe, collision‑resistant
KSUID – K‑sortable, 27 characters, for event ordering
CUID / CUID2 – collision‑resistant for client‑side generation

Common use cases for unique IDs

🗄️ Database primary keys (MySQL, PostgreSQL, MongoDB, etc.)
🔗 Short, URL‑safe IDs for links or referral codes (NanoID)
📨 Message queue identifiers or correlation IDs
🧪 Load testing – generate thousands of unique test IDs
⚙️ Distributed systems – KSUID / ULID for event ordering

Privacy & Security

🔒 All ID generation happens locally in your browser using JavaScript
🚫 No data is uploaded – your generated IDs never leave your device
🕵️ No tracking, no logs, no third‑party scripts
💼 Secure for production keys and tokens

Frequently asked questions (UUID / unique ID generator)

What’s the difference between UUID v4 and v7?

UUID v4 is completely random – best for general uniqueness but not sortable. UUID v7 combines a timestamp with random data, making it sortable by creation time – great for databases that need ordered IDs.

Can I generate NanoID with custom length?

This tool generates NanoID with the default length of 21 characters, which offers high collision resistance. For custom lengths, you can modify the generated list manually or use a dedicated library.

Is KSUID better than UUID for event ordering?

KSUIDs are designed for K‑sortable ordering (by time) and are 27 characters long. They are excellent for event‑sourced systems or log aggregation where time order matters. UUID v7 offers similar properties with standard UUID length.

How can I export generated IDs to SQL?

Click the “SQL” export button. The tool will generate a list of INSERT statements (e.g., INSERT INTO ids (id) VALUES ('...');) that you can run directly in your database.

Are the generated IDs truly unique?

Yes. UUID v4 uses 122 random bits, offering a probability of collision so low it’s negligible for practical purposes. ULID, KSUID, and NanoID also use sufficient randomness and timestamp entropy to ensure uniqueness across systems.

Does this tool work offline?

Yes. Once the page loads, all generation scripts are cached. You can disconnect from the internet and still generate unlimited IDs.