UUID生成ツール
Generate UUID values online and review version, randomness, formatting, and identifier use. 日本語 locale.
Make HTML structure easier to inspect
This tool generates UUID strings for identifiers, test data, correlation values, or record keys. A UUID is an identifier f...
Formatting is not HTML validation
A UUID is a 128-bit identifier commonly displayed as hexadecimal groups separated by hyphens. Versions use different input...
How to format HTML
- Choose the requested version, generate one or more values, and copy the exact result. Check whether the receiving system e...
- Choose the requested version, generate one or more values, and copy the exact result. Check whether the receiving system e...
Formatting method
- Read markup structure
The generator creates bytes according to the selected version, sets version and variant bits where applicable, and formats...
- Apply indentation
The generator creates bytes according to the selected version, sets version and variant bits where applicable, and formats...
- Preserve content
The generator creates bytes according to the selected version, sets version and variant bits where applicable, and formats...
Exact parser recovery, optional-tag handling, whitespace policy, embedded-language behavior, and error wording should be c...
Read the formatted result
A valid-looking UUID has the expected hexadecimal groups and version markers. Uniqueness is a probability or design proper...
よくある間違い
Common mistakes include treating a UUID as a password, assuming every UUID is random, changing characters during copy, usi...
Common mistakes include treating a UUID as a password, assuming every UUID is random, changing characters during copy, usi...
制限と特殊なケース
This generator does not guarantee global uniqueness, secrecy, ordering, database integrity, or authorization. Version supp...
This generator does not guarantee global uniqueness, secrecy, ordering, database integrity, or authorization. Version supp...
Examples
UUID Generator online — 1
What is a UUID?
Choose the requested version, generate one or more values, and copy the exact result. Check whether the receiving system e...
A valid-looking UUID has the expected hexadecimal groups and version markers. Uniqueness is a probability or design proper...
UUID Generator online — 2
Are UUIDs always random?
Choose the requested version, generate one or more values, and copy the exact result. Check whether the receiving system e...
A valid-looking UUID has the expected hexadecimal groups and version markers. Uniqueness is a probability or design proper...
UUID Generator online — 3
Can a UUID be a secret?
Choose the requested version, generate one or more values, and copy the exact result. Check whether the receiving system e...
A valid-looking UUID has the expected hexadecimal groups and version markers. Uniqueness is a probability or design proper...
UUID Generator online — 4
Which UUID version should I use?
Choose the requested version, generate one or more values, and copy the exact result. Check whether the receiving system e...
A valid-looking UUID has the expected hexadecimal groups and version markers. Uniqueness is a probability or design proper...
UUID Generator online — 5
Does a UUID prove uniqueness?
Choose the requested version, generate one or more values, and copy the exact result. Check whether the receiving system e...
A valid-looking UUID has the expected hexadecimal groups and version markers. Uniqueness is a probability or design proper...
UUID Generator online — 6
Can I generate many UUIDs?
Choose the requested version, generate one or more values, and copy the exact result. Check whether the receiving system e...
A valid-looking UUID has the expected hexadecimal groups and version markers. Uniqueness is a probability or design proper...
Frequently asked questions
What is a UUID?
A UUID is an identifier. Select a version and enforce uniqueness, validation, access control, and storage rules in the sys...
Are UUIDs always random?
A UUID is an identifier. Select a version and enforce uniqueness, validation, access control, and storage rules in the sys...
Can a UUID be a secret?
A UUID is an identifier. Select a version and enforce uniqueness, validation, access control, and storage rules in the sys...
Which UUID version should I use?
A UUID is an identifier. Select a version and enforce uniqueness, validation, access control, and storage rules in the sys...
Does a UUID prove uniqueness?
A UUID is an identifier. Select a version and enforce uniqueness, validation, access control, and storage rules in the sys...
Can I generate many UUIDs?
A UUID is an identifier. Select a version and enforce uniqueness, validation, access control, and storage rules in the sys...
Are uppercase UUIDs different?
A UUID is an identifier. Select a version and enforce uniqueness, validation, access control, and storage rules in the sys...
Can a UUID replace a database key?
A UUID is an identifier. Select a version and enforce uniqueness, validation, access control, and storage rules in the sys...