VIN Decoder

How to use

1. 1Pick a mode at the top: Single VIN to decode one number with the full structural breakdown and per-character math, or Batch list to validate one VIN per line.
2. 2Type or paste the VIN. Spaces, dashes, and underscores are ignored, and lowercase letters are accepted; the tool normalizes the input before decoding.
3. 3Read the verdict. The check digit, country and region, model year, plant code, and structural breakdown all appear together so you know exactly what each part of the VIN means.
4. 4Use the sample VINs under the input to try a typical North American, German, or Japanese VIN, or an invalid VIN that demonstrates a failed check digit.
5. 5Click Copy normalized VIN to grab the cleaned 17-character form, or in batch mode click Copy valid VINs to keep only the entries that pass the check.

About this tool

VIN Decoder reads any 17-character Vehicle Identification Number and breaks it into the fields the standards define, entirely in your browser. The tool follows ISO 3779 for VIN structure and SAE J853 for the country-of-manufacture map, and it verifies the position-9 check digit using the algorithm published by the US National Highway Traffic Safety Administration in 49 CFR Part 565.15. Paste a VIN and the result panel shows the verdict, the expected check digit (with the math behind it), the World Manufacturer Identifier in positions 1 to 3 mapped to a country and region, the Vehicle Descriptor Section in positions 4 to 8 (the brand-specific block that describes model, platform, body, restraint system, and powertrain), the model-year code at position 10 resolved against the 30-year repeating cycle (with the position-7 letter-versus-digit hint used to pick the most likely cycle), the assembly-plant code at position 11, and the production serial number in positions 12 to 17. A character-by-character breakdown table shows the transliteration value and weight at each of the 17 positions so the algorithm is verifiable line by line, which makes the tool a teaching aid as well as a checker. The input is normalized before decoding: whitespace, hyphens, and underscores are stripped; lowercase letters are uppercased; the forbidden letters I, O, and Q are flagged explicitly so a transcription typo is caught instead of silently mis-decoded. A separate batch mode validates one VIN per line and exposes a single click to copy the valid-only list back to the clipboard, which is useful for cleaning auction sheets, fleet manifests, dealer exports, and any tabular data where bad VINs sneak in. The tool is intentionally honest about scope: it decodes only what the VIN encodes per the standards (structural fields and the check digit). It does not look up make, model, trim, color, recall history, ownership, or accident records; those facts live in vehicle databases and require a separate query against a paid or government source. Useful for car buyers checking auction-listing VINs for typos, automotive developers building parts catalogs, insurance and fleet teams cleaning data, salvage and recycling operators verifying transferred VINs, and anyone who needs to confirm a VIN was entered correctly before sending it on. All decoding runs locally on your device, so the VINs you paste here never leave your browser.

Free to use. Works in your browser. No signup, no login.