UUID 產生器

Creating test and sample data

Mass-produce unique IDs for database rows or API requests without worrying about collisions. Drop realistic-looking values straight into seed data or mock responses.

Issuing temporary keys and correlation IDs

Get a collision-resistant identifier on the spot for a request (correlation) ID to trace across logs, an idempotency key, or a temporary file name.

Checking the format before you build

Inspect a real UUIDv4 — its length, hyphen positions (8-4-4-4-12), and version/variant bits — while you decide on a database column type or a validation regex.

處理皆在瀏覽器內完成

輸入與輸出都留在你的裝置，關閉分頁或清除快取時，暫存狀態會被移除。

關鍵資料請再次確認

結果僅供輔助，放到正式系統或對外分享前請先檢查並依需求驗證。

大型資料仰賴裝置性能

非常大的文字或檔案在部分瀏覽器可能較慢，建議重度工作時使用桌面環境。