UUID Format Converter
Local ProcessingConvert a UUID to Base64, hex, decimal or binary, or between v1 and v6.
How It Works & Processing Standards
Convert a UUID to Base64, hex, decimal or binary, or between v1 and v6.
Tool processing runs in your browser. If you create a calculator or conversion share link, its values are included in the URL. See the privacy policy for account, analytics and advertising data.
Current Limits
- Maximum input length: 100,000 characters
A UUID is a 128-bit number, so it can be written many ways. Pick a format under "Task" to convert. v1 ↔ v6 reorders the same time and node data into a sortable layout (v6).
What You Can Do
- Base64
- Shrinks the 16 bytes to 24 Base64 characters.
- Hex, decimal, binary
- View it as 32 hex digits without hyphens or as a big integer.
- v1 ↔ v6
- Reorders the time fields to turn v1 into sortable v6, or back.
How to Use UUID Format Converter
- 1Choose a taskPick the target format.
- 2Enter a UUIDPaste a UUID with hyphens.
- 3CopyCopy the converted value.
Examples
To Base64
Input: 6ba7b810-9dad-11d1-80b4-00c04fd430c8
Result: a6e4EJ2tEdGAtADAT9QwyA==
To decimal
Input: 00000000-0000-0000-0000-0000000000ff
Result: 255
v1 → v6
Input: 6ba7b810-9dad-11d1-80b4-00c04fd430c8
Result: 1d19dad6-ba7b-6810-80b4-00c04fd430c8
Common Use Cases
- Storing UUIDs as shorter strings or numbers
- Matching the format another system expects, such as Base64
- Moving existing v1 IDs to time-sortable v6
Frequently Asked Questions (FAQ)
Does v1 ↔ v6 lose information?
No. The same bits are only reordered, so converting back gives the original UUID.