Fake French SIRET and SIREN generator for B2B test data

What is French SIRET / SIREN Generator?

SIREN identifies a French company and SIRET identifies a specific establishment. Fictitious examples help test B2B forms without using real companies or real administrative IDs.

Main use case: Generate fake SIREN or SIRET numbers for onboarding, billing, CRM, QA and demo datasets.

Common use cases

B2B onboarding

Fill company identification fields in test environments.

Billing QA

Prepare realistic company fixtures for invoices.

CRM demos

Create non-real French company records.

How to use the tool

1. Choose SIREN, SIRET or both.
2. Set the number of examples.
3. Generate fictitious values.
4. Validate them locally if your workflow requires it.

Best practices

• Use realistic test values when validating forms, exports or API payloads.
• Keep real customer, banking and production secrets out of public tools.
• Check the output format before copying it into a production workflow.
• Document whether a value is generated, validated, converted or only estimated.

Common mistakes

Confusing valid format with real-world validity

A generated or locally validated value can match a format without proving that it exists in an official system.

Using real production data

Public utilities are best for test data, demos, fixtures, QA and quick checks, not for confidential values.