UUID V1 generator
You can use pre-generated UUID V1 value. Use Copy icon to copy it.
Use Refresh icon to generate a new value.
If you need multiple UUIDs, you can generate list with Generate button.
Overview – UUID v1
The UUID v1 standard defines a time-based identifier that includes a high-precision timestamp, making the generated values sortable and suitable for systems requiring chronological order. This tool allows you to generate UUID version 1 values instantly and directly in your browser—no installation or external requests involved.
How this UUID v1 identifier is created
Each UUID v1 is composed of:
- a 60-bit timestamp,
- a 14-bit clock sequence,
- a 48-bit node component.
Together, they form a 128-bit structure represented as 32 hexadecimal characters and four hyphens. All generation happens locally for maximum privacy.
How to use this UUID v1 generator
The interface is designed to simplify both single and bulk generation of time-based UUIDs.
Main actions
- Click Generate to create a new UUID v1.
- Use the Refresh icon to regenerate the current identifier.
- Click the Copy icon to copy the active UUID to your clipboard.
Generating multiple UUIDs
- Enter any number in Generate multiple to create a list of values.
- Choose the desired output format in Separated by:
- New line (\n)
- CRLF (\r\n)
- JSON
- Comma
- Semicolon
- Space
- Custom separator
The generated list appears in the results panel below.
Managing the generated list
Below the results panel you can use three actions:
- Copy — copies the entire list to the clipboard
- Save — downloads the generated values as a file.
The file format depends on the selected separator: - when JSON is selected, the list is saved as a .json file
- when Comma or Semicolon is selected, the list is saved as .csv file
- for all other separators, the output is saved as a .txt file
- Clear — removes all values from the output area
All operations are performed locally in your browser.
Examples of generated identifiers
Below are examples of valid UUIDs created by this UUID v1 generator:
|
07ac7fa0-d028-11f0-aad6-b74c3042c8d8 07ac80b2-d028-11f0-aad6-b74c3042c8d8 07ac8200-d028-11f0-aad6-b74c3042c8d8 |
Where UUID v1 is commonly used
- logging pipelines and monitoring systems
- distributed tracing
- message queues
- time-ordered database keys
- large-scale applications generating sequential identifiers
Technical structure
The identifier is a UUID version 1, consisting of 128 bits encoded in hexadecimal:
| Component | Length | Description |
|---|---|---|
| Timestamp | 60 bits | High-precision time component |
| Version (1) | 4 bits | Indicates UUID type |
| Clock sequence | 14 bits | Prevents duplicates on clock rollback |
| Node identifier | 48 bits | Randomized value replacing hardware MAC |
UUID v1 provides chronological order, high throughput and reliable uniqueness, making it a strong choice for ordered, distributed or time-sensitive systems.