UUID Generator
⚙️ Options
📋 Generated UUIDs
About UUID Generator
A UUID (Universally Unique Identifier) is a 128-bit label used for information in computer systems. Standard UUIDs consist of 32 hexadecimal digits displayed in 5 groups separated by hyphens (e.g. 8-4-4-4-12), for a total of 36 characters.
Comparison: UUID v4 vs UUID v7
| Feature | UUID v4 (Random) | UUID v7 (Time-Ordered) |
|---|---|---|
| Sorting | None (un-ordered) | Chronological (natural sorting by date/time) |
| Database Performance | Causes index fragmentation in large SQL tables | Optimal for clustered indexing, faster database inserts | High (fully random) | Exposes the exact creation millisecond |
How to use this tool:
- Choose the preferred UUID Version (v4 is standard, v7 is highly recommended for database primary keys).
- Enter the quantity of UUIDs to generate (from 1 up to 500).
- Optionally toggle Uppercase output, remove hyphens, or wrap inside braces
{}. - Click Generate UUIDs to generate your unique identifiers. Copy or download them instantly.
🆔 UUID Generator – Online Tool
UUID Generator is a free online tool that allows you to generate Universally Unique Identifiers (UUIDs) quickly and easily. It supports standard UUID versions (v1, v4, v7), bulk generation, and multiple output format customisations.
Supported UUID Versions:
- UUID v4 (Random): The most common type. Generated purely using cryptographic random numbers. Almost zero chance of duplication.
- UUID v7 (Time-Ordered): The modern standard (RFC 9562). Based on a Unix timestamp and random data. Ideal for database primary keys as they sort naturally.
- UUID v1 (Timestamp-based): Generated using time, clock sequence, and a node (multicast mac address). Good for chronological logs.
Why use our UUID Generator?
- 🛡️ Secure Generation – Uses cryptographically secure browser-native random number generators.
- 🚀 Bulk Generation – Create up to 500 unique UUIDs at once.
- ⚙️ Formats Customisation – Customize uppercase/lowercase, hyphens, and brackets wrapper.