VIN Decoder & Validator
NewValidate a 17-character Vehicle Identification Number's check digit and decode its region, model-year code, and serial segment.
———————This decodes structural information only (region, approximate model year, check-digit validity) from the VIN's public format rules. It does not look up the exact make/model/trim — that requires a manufacturer or NHTSA database, which this offline, privacy-first tool does not call.
Frequently Asked Questions
How does VIN check-digit validation work?
Each of the 17 characters is converted to a numeric value using a standard transliteration table (letters map to 1-9, with I/O/Q never used to avoid confusion with 1/0), multiplied by a fixed weight per position, summed, and reduced mod 11 — the 9th character must equal that result (with "X" representing 10).
Does this tool tell me the exact make, model, and trim?
No — it only decodes structural information available from the VIN's public format rules: the region implied by the first character, the World Manufacturer Identifier (first 3 characters), an approximate model year from position 10, and the serial number. Looking up the exact make/model/trim requires a manufacturer or NHTSA database, which this offline tool intentionally does not call.
Why does the model year show two possible years?
The model-year character code cycles every 30 years, so a single letter or digit corresponds to two possible years three decades apart. Without additional context (like the WMI's known production era), both are equally valid readings of that character.
Why does the check digit sometimes fail on a real, legitimate VIN?
The check-digit formula (in ISO 3779 / SAE J853) is a North American / US-mandated requirement. Some countries and older vehicles issue VINs without enforcing this check digit, so a "failed" check on an otherwise correctly-formatted VIN doesn't always mean it's fake.
Is any part of my VIN sent anywhere?
No — decoding happens entirely with JavaScript running in your browser. There is no server call, database lookup, or logging involved.