# VIN Decoder

A VIN decoder that runs entirely in your browser against a carried copy of NHTSA's vPIC database, so the VIN is never transmitted — plus car loan, tire size and gear ratio calculators that behave the same way.

Contact: support@quietvin.com
Canonical: https://quietvin.com/

- [VIN Decoder — decode a VIN without sending it anywhere](https://quietvin.com/) — Decode a VIN, look it up, and read the make, model, year, body and engine — all of it worked out inside your browser, so the VIN is never transmitted anywhere.
- [Car loan calculator with the total cost — VIN Decoder](https://quietvin.com/car-loan-calculator/) — Find the monthly payment on a car loan and what the car actually costs once interest, sales tax, fees and your trade-in are counted. No lead form and no email gate.
- [Tire size and speedometer error calculator — VIN Decoder](https://quietvin.com/tire-size-calculator/) — Compare one tire size against another and read the diameter change, the speedometer error at a speed you choose, and the clearance change. It sells nothing.
- [Gear ratio calculator: engine RPM at road speed — VIN Decoder](https://quietvin.com/gear-ratio-calculator/) — Work out engine speed at any road speed from the gear ratio, the final drive and the tire size, with the overall drive ratio and revolutions per mile alongside.
- [VIN check digit calculator — the ISO 3780 arithmetic](https://quietvin.com/vin-check-digit/) — Work out the ninth character of a VIN from the other sixteen, with every multiplication shown, and read what a disagreement does and does not prove.
- [How this VIN decoder site works, and what it will not do](https://quietvin.com/how-it-works/) — Every formula the three calculators use, how the coming decoder will read a VIN without transmitting it, and the four things this site refuses to offer.
- [About this site and the state of the build](https://quietvin.com/about/) — Why a VIN decoder should not need a server at all, what this site costs you, and an honest account of which parts are finished and which are still being written.
- [Privacy: what stays in your browser — VIN Decoder](https://quietvin.com/privacy/) — Every figure and every tire size you type stays inside your browser. The two analytics events this site counts, what they carry, and the storage it does not use.
- [Terms of use and accuracy limits — VIN Decoder](https://quietvin.com/terms/) — What this site is and is not: arithmetic for planning rather than advice, the accuracy limit on every figure, and the fitment warning that matters more than any of them.
- [Cookies: this site sets none — VIN Decoder](https://quietvin.com/cookies/) — This site sets no cookies at all. What it uses instead is two analytics events that carry a name and nothing else, sent to a cookieless collector.
- [Contact — VIN Decoder](https://quietvin.com/contact/) — The address that reaches a person, what to put in a report about a figure that looks wrong, and an honest account of how quickly mail is answered.
- [VIN Decoder site map and public route index](https://quietvin.com/sitemap/) — A human-readable map of every public page on this site, generated from the same route list as the XML sitemap and the machine-readable discovery manifest.