生成工具
UUID 生成器
免费的 UUID v4 生成器。一次生成或批量生成加密安全的 RFC 4122 UUID（GUID）。一键复制。在您的浏览器中运行。
Runs in your browser
Random unique identifiers, on demand.
Generateunique identifiers
v4 UUIDs from the Web Crypto API — 122 random bits per identifier, ≈ 5.3 × 10³⁶ possibilities.
编辑注
Understanding · A 128-bit ticket.
本深度章节目前仅有英文版本。上方的转换工具支持您的语言;长篇说明文章尚未翻译。
常见问题
Quick answers.
›Which UUID version is generated?
Version 4 (random) by default, generated with crypto.getRandomValues for true randomness.
›Can I generate many at once?
Yes — pick any count up to 1,000 and copy them all with a single click.
›Are UUIDs really unique?
Practically, yes. The chance of v4 UUID collision is negligible — you'd need to generate billions per second for centuries.
›Is GUID the same as UUID?
Yes. GUID is Microsoft's name for the same RFC 4122 UUID format. They're interchangeable.
›Are the UUIDs sent anywhere?
No — generation happens locally in your browser. Nothing is logged.
›Is the generator free?
Yes — fully free, no signup.
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