VIN Decoder
Free online VIN decoder. Client-side, private, bilingual EN/TH.
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What is VIN Decoder?
A VIN Decoder breaks down the 17-character Vehicle Identification Number into its ISO 3779 components: WMI (manufacturer), VDS (vehicle descriptor), check digit, VIS (model year, plant, and serial), plus country and region derived from the first character.
Key Benefits
- Instant decode as you type — no submit button
- ISO 3779 check-digit verification catches typos
- Built-in WMI database for 100+ manufacturers
- Country and region detection from position 1
- 100% client-side — your VIN never leaves the browser
Common Use Cases
- •Used-car buyers verifying a seller’s claims
- •Insurance and registration clerks double-checking entries
- •Auto parts shops matching components to the correct chassis
- •Fleet managers auditing vehicle records in bulk
- •Curious owners learning what their VIN encodes
How to Decode a VIN
- Enter the VIN: Type or paste the 17-character Vehicle Identification Number into the input box. The tool auto-uppercases as you type.
- Watch the status cards: Three cards confirm Length (17 chars), Charset (no I, O, Q), and Check Digit validity in real time.
- Read the breakdown: The decoded table shows WMI, VDS, VIS, country, region, manufacturer, model year, plant code, and serial number with their VIN positions.
- Copy the result: Click Copy to save the full decoded breakdown as labelled text for records or reports.
Key Features
- Decode 17-character VINs to country, manufacturer, model year, and serial
- ISO 3779 check-digit validation with computed vs. actual digit
- Built-in WMI lookup covering 100+ common manufacturers worldwide
- Region and country detection from the first character
- Instant feedback as you type, no submit button needed
- Copy full decoded breakdown to clipboard
Frequently Asked Questions
What is a VIN?
A Vehicle Identification Number (VIN) is a unique 17-character code assigned to every motor vehicle, following the ISO 3779 standard. It encodes the manufacturer, country, model year, plant, and serial number.
How is the check digit calculated?
Position 9 is a check digit computed using the ISO 3779 formula: each character is assigned a numeric value, multiplied by a positional weight, summed, and taken modulo 11 (10 becomes X). This tool shows both the actual and computed digits.
Why are I, O, and Q not allowed in a VIN?
These letters are excluded to avoid confusion with the digits 1 and 0. The allowed characters are A–H, J–N, P, R–Z and 0–9.
Can this tool tell me the exact make and model?
It identifies the manufacturer from the WMI (positions 1–3) and the model year from position 10, but the full model/trim details live in positions 4–8 (VDS) which each manufacturer defines differently. A full vehicle history report from a paid service covers those details.