Free Online UUID Generator (v1, v3, v4, v5) – Bulk, Secure & Fast
Generate UUIDs instantly with our free online UUID Generator tool. Create UUID v1, v3, v4, and v5 in bulk, customize formatting, export results, and copy all with a single click. This tool runs entirely in your browser—your data never leaves your device—making it fast, secure, and completely private.
UUIDs (Universally Unique Identifiers) are 128-bit values used in databases, APIs, distributed systems, microservices, session tokens, security workflows, and more. Whether you're a developer, tester, DevOps engineer, or student, this UUID Generator provides a clean, reliable, and feature-rich way to create valid RFC-4122 UUIDs.
How to Use the UUID Generator
Using this tool is simple. Select the UUID version you want to generate (v1, v3, v4, or v5), choose how many UUIDs you need (up to 500 at once), and clickGenerate UUIDs. You can also customize the output with advanced options like uppercase formatting, removing hyphens, adding prefixes or suffixes, and enabling auto-copy.
- Choose UUID version (v1, v3, v4, v5)
- Select the total count to generate
- Enable advanced formatting options
- Click “Generate UUIDs”
- Copy, export, or filter your UUIDs instantly
UUID Versions Explained
This tool supports multiple UUID versions as defined by RFC-4122. Each version generates identifiers using a different strategy:
- UUID v1 (Timestamp-based)
Uses system time + MAC address. Useful when ordering by creation time matters. - UUID v3 (Name-based, MD5)
Creates reproducible UUIDs using MD5 hashing. Ideal for deterministic identifiers. - UUID v4 (Random-based)
Fully random UUIDs generated using secure random values. Most widely used. - UUID v5 (Name-based, SHA-1)
Similar to UUID v3 but uses SHA-1 hashing for improved uniqueness.
Why Use This UUID Generator?
- Generate up to 500 UUIDs instantly
- Supports UUID v1, v3, v4, v5
- Runs 100% locally in your browser—no data is sent to any server
- Format output: uppercase, lowercase, hyphen removal
- Add custom prefixes or suffixes
- Copy all UUIDs with a single click
- Export to TXT or JSON
- Search & filter your results instantly
- Works on desktop, mobile, and tablets
- Free forever
Frequently Asked Questions
Is this UUID generator secure?
Yes. All UUIDs are generated locally using secure browser APIs. Nothing is uploaded or stored.
What is UUID v4?
UUID v4 uses random numbers to generate 128-bit identifiers. It is the most commonly used UUID version.
Can I generate UUIDs in bulk?
Yes, you can generate up to 500 UUIDs at once using this tool.
Do you store the generated UUIDs?
No. The generation happens fully on your device. We never store or track UUIDs.
What can I use UUIDs for?
UUIDs are used for database IDs, distributed systems, API tokens, test data, sessions, and unique identifiers.
Is this UUID tool free?
Yes — it is completely free with no usage limits.