JSON整形
JSONを読みやすく整形します。
開発ツール
UUID生成
ランダムなUUID v4を生成します。
UUID生成
UtilBrix が提供詳しい方法と使用例は英語で提供しています。
Step-by-step instructions (English)
- Choose a quantity between 1 and 100.
- Select upper or lower case and whether to include hyphens.
- Generate the identifiers, then copy the list in the format your application expects.
計算式と方法
UUID v4 identifiers use the browser cryptographic random source through crypto.randomUUID(). The version and variant bits are set according to the UUID format. Letter case and hyphen options change presentation only.
使用例
A standard v4 UUID has 36 characters including hyphens, in groups of 8-4-4-4-12. Generate between one and 100 identifiers per run.
When this tool is useful
Create identifiers for test records, fixtures, or a new object before storing it. Batch output is convenient when several independent records need identifiers in the same development workflow.
Common mistakes and limitations
- These are random version 4 UUIDs, not sortable time-based identifiers.
- Removing hyphens changes presentation, but some receiving systems require the standard hyphenated representation.
Practical questions about this tool (English)
Can two generated UUIDs collide?
Random UUIDs have a very large identifier space, so accidental collision is extremely unlikely, but not mathematically impossible. Use database uniqueness constraints where uniqueness must be enforced.
Are UUIDs suitable as passwords or authorization checks?
An identifier should not by itself grant access. Validate authorization separately even when record IDs are difficult to guess.