無料のUUIDジェネレーター｜一意の識別子を簡単に瞬時に自動生成
システム開発やデータベース管理で絶対に重複しないユニークなIDを、ワンクリックで安全かつ簡単に生成できる便利なオンラインツールです。
min1790 words
無料のオンラインツールを使用してUUIDを生成します。より深く理解するための解説やヒントとともに、結果を即座に取得できます。
developer
UUIDジェネレーター
無料のオンラインツールを使用してUUIDを生成します。より深く理解するための解説やヒントとともに、結果を即座に取得できます。
入力
計算に必要な値を入力してください
結果
計算結果を表示
計算するには以下の値を入力してください
a UUID ジェネレーターとは何ですか
A UUID ジェネレーター creates universally unique identifiers for databases, APIs, and software development. Supports multiple UUID versions.
使い方
Select the UUID version and quantity needed. Click 生成 and copy your unique identifiers.
よくある質問
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit label used for information in computer systems. When generated according to the standard methods, UUIDs are practically unique, meaning the chance of the same identifier being generated twice is negligible.
What is UUID Version 4?
UUID Version 4 is a random UUID generated using random or pseudo-random numbers. It is the most common version used today because it does not require a central authority or unique MAC address to generate, ensuring both privacy and high uniqueness.
Is a UUID truly unique?
While absolute uniqueness is mathematically impossible, the probability of a collision (generating the same UUID twice) for Version 4 is extremely low. You would need to generate trillions of UUIDs before having a significant chance of a duplicate.
What is the standard format of a UUID?
A standard UUID is represented as a 32-character hexadecimal string, displayed in five groups separated by hyphens. The format looks like 8-4-4-4-12 (e.g., 123e4567-e89b-12d3-a456-426614174000).
Does it matter if I use uppercase or lowercase?
No, UUIDs are case-insensitive. 'A' and 'a' represent the same value in hexadecimal. However, it is standard convention to output them in lowercase.
Can I remove the hyphens from the UUID?
Yes, the hyphens are purely for human readability and do not affect the underlying value. You can use this calculator to generate a UUID without hyphens if required for URLs or database storage.
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