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UUID Use Case

UUID API Key

An API key is a secret token. A random UUID is unpredictable enough to serve as one, provided you store only its hash and treat it as a password.

Opaque secretStore the hashRotatable

Version

How many

Uppercase Hyphens Braces { }

Result

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

What Is UUID API Key?

A v4 UUID has 122 random bits — far more than enough entropy for a bearer token.
Never store the raw key. Store a hash (e.g. SHA-256) and compare on each request, exactly as you would a password.

How to generate

Generate a v4 UUID per credential.
Hash it (SHA-256) and store only the hash.
Return the plaintext once at creation; support rotation by issuing a new UUID.

Use Cases

Server-to-server REST auth.
Webhook signing secrets.
CI / deploy tokens.

Code Examples

JavaScript

const id = crypto.randomUUID();

Python

import uuid
id = uuid.uuid4()

Frequently Asked Questions

Is a UUID secure enough as an API key?

Yes for most services — 122 bits of randomness is stronger than many 64- or 80-bit keys. Pair it with hashing and rate limiting.

Should I store the raw UUID?

No. Store a SHA-256 hash and return the raw value only at creation time.

Related tools

UUID v1 Generator UUID v3 Generator UUID v4 Generator UUID v5 Generator UUID v6 Generator UUID v7 Generator UUID v8 Generator Bulk UUID Generator Short UUID Generator UUID Validator UUID Formatter UUID as a Primary Key UUID Database ID UUID Foreign Key UUID Shard Key UUID Partition Key UUID in a Composite Key UUID Surrogate Key UUID API Key UUID Session Token UUID Access Token UUID Refresh Token UUID Idempotency Key UUID Request ID UUID Correlation ID UUID Trace ID UUID CSRF Token UUID Nonce UUID Filename UUID Object Key UUID S3 Key UUID Upload ID UUID Cache Key UUID Blob Name UUID Temp File UUID User ID UUID Account ID UUID Customer ID UUID Device ID UUID Tenant ID UUID Client ID UUID Anonymous ID UUID Member ID UUID Message ID UUID Event ID UUID Job ID UUID Task ID UUID Queue Message ID UUID Transaction ID UUID Order ID UUID Invoice ID UUID Payment ID UUID Reset Token UUID Verification Token UUID Invite Code UUID API Secret UUID Share Link UUID Magic Link UUID Node ID UUID Worker ID UUID Lock ID UUID Cluster ID UUID Test Data UUID Seed Data UUID Fixture UUID Mock ID UUID Placeholder ID UUID Sample ID