VIN Checksum Validator - Free, Instant, In Your Browser
Enter a 17-character VIN to check whether its 9th-position check digit is valid.
How to use VIN Checksum Validator
- 1Paste your text or data into the input box above.
- 2VIN Checksum Validator runs instantly, right in your browser.
- 3Copy the result or use it directly.
Your file is processed in your browser and is never uploaded.
Frequently Asked Questions
What's the formula?
Uses the ISO 3779/NHTSA transliteration and position-weighting scheme: each of the 17 characters is converted to a value and multiplied by its position weight, summed and reduced mod 11 (a remainder of 10 means the check digit should be "X").
Is my data sent to a server?
No - everything runs entirely in your browser with JavaScript. Nothing is uploaded.