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UUID Use Case

UUID Reset Token

A reset link is a temporary key to an account. A random v4 UUID, hashed and short-lived, is the safe standard.

Single-useHashed + expiredv4

Version

How many

Uppercase Hyphens Braces { }

Result

Generated locally with the Web Crypto API — nothing leaves your browser.

What Is UUID Reset Token?

The reset token must be unguessable and time-limited. A v4 UUID satisfies both; store only its hash.
Invalidate it the moment it is used so a leaked link cannot be replayed.

How to generate

Generate a v4 UUID on request.
Store a hash with a 15–60 min expiry.
On reset, verify hash, then delete it.

Use Cases

Password reset emails.
Account recovery.
2FA fallback.

Code Examples

JavaScript

const id = crypto.randomUUID();

Python

import uuid
id = uuid.uuid4()

Frequently Asked Questions

Why hash the reset token?

If your DB leaks, raw tokens would let attackers reset accounts; hashes are useless to them.

How long should it live?

Short — 15 to 60 minutes. Long enough to check email, short enough to limit abuse.

Related tools

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