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UUID Use Case

UUID Seed Data

Seed data should look like production — UUID keys, realistic relations — so demos and dev behave the same.

Demo-readyDistinct keysv4

Version

How many

Uppercase Hyphens Braces { }

Result

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

What Is UUID Seed Data?

Seed scripts that emit UUIDs produce portable, realistic datasets you can reload without key clashes.
Because UUIDs are unique, re-seeding rarely collides with existing rows.

How to generate

Generate UUIDs in the seed script, not hardcoded.
Reference them across related seed rows.
Idempotize by clearing the table first.

Use Cases

Local development.
Demo environments.
Onboarding samples.

Code Examples

JavaScript

const id = crypto.randomUUID();

Python

import uuid
id = uuid.uuid4()

Frequently Asked Questions

Deterministic seed UUIDs?

If you need repeatable seeds, derive them from a fixed namespace (v5) rather than random v4.

Will re-seeding clash?

Clear-then-insert avoids clashes; with v4 you could also just insert and get new ids.

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