Free tool
Free VIN decoder and validator
Paste a VIN from any Copart or IAA listing and instantly verify it is real: check-digit math, manufacturer, build country, and model year — decoded entirely in your browser, nothing sent anywhere.
Every 17-character VIN encodes the same fields:
| Positions | Meaning |
|---|---|
| 1–3 | World Manufacturer Identifier — country and manufacturer |
| 4–8 | Vehicle descriptor — model, body, engine, restraint system |
| 9 | Check digit — validates the VIN on North American vehicles |
| 10 | Model year code |
| 11 | Assembly plant |
| 12–17 | Sequential serial number |
The decoder validates the check digit, identifies the manufacturer and build country from the WMI, and decodes the model year — entirely in your browser. VINs never use the letters I, O, or Q.
What a decode can and cannot tell you
Decoding reads the VIN's structure: who built the car, where, and in what model year. It is the fastest way to catch a listing error or a retyped VIN — if the decoded year or make disagrees with the listing, stop and find out why before you research any further.
The check digit in position nine is a built-in typo detector for North American VINs. If it fails, the most common cause is a transcription mistake — a 1 read as I, a 0 as O — and the second most common is a listing worth treating with suspicion.
What a decode cannot do is tell you the car's story. Title brands, odometer flags, auction records, and damage history live in databases keyed by the VIN, not inside the VIN itself. Once the VIN checks out structurally, that history lookup is the next step.
VIN decoding questions
- Is this VIN decoder really free?
- Yes. The decode runs entirely in your browser using the VIN's own structure — there is no lookup fee, no account, and the VIN is not transmitted anywhere unless you choose to run a full report afterwards.
- Why does my VIN fail the check digit?
- Usually a typo — VINs never use the letters I, O, or Q, and mixing those up with 1 and 0 is the classic mistake. Some vehicles built for markets outside North America do not use the check-digit system at all.
- Can two cars share a VIN?
- Legitimately, no — each 17-character VIN is unique. VIN cloning fraud does exist, which is why the plated VIN on the car should always match the title, the listing, and every glass or door-jamb sticker.
- What year does position 10 mean?
- Model year codes repeat every 30 years, so the same letter can mean 1980-series or 2010-series years. The decoder shows the plausible candidates; position 7 and the car itself resolve any ambiguity.