SIRET/SIREN Validator
Validate French SIRET (14 digits) and SIREN (9 digits) business identification numbers using the Luhn algorithm.
How to Validate SIRET/SIREN Numbers
- 1 Enter the SIRET (14 digits) or SIREN (9 digits) number
- 2 Click 'Validate' to check the number
- 3 View whether the number is valid or invalid
- 4 See the type (SIRET or SIREN) and component parts
- 5 Use example numbers to test the validation
Frequently Asked Questions
Is my code or data stored anywhere? ▼
No. All developer tools process data locally in your browser. Nothing is sent to any server or logged.
Can I use these tools offline? ▼
Yes! After the initial page load, most developer tools work without an internet connection.
Are there API limits? ▼
No limits. Since processing happens in your browser, you can use the tools as much as you need.
Is the output compatible with production use? ▼
Yes. Our tools produce standard-compliant output suitable for production environments.
🔒 Instant results, faster than AI. No signup. 100% private.
Last updated: January 15, 2026 · v2.1