Coin Grader Online — Free AI Tool
A free online coin grader powered by AI. Upload your coin and get a Sheldon-scale grade estimate in about 60 seconds — without installing anything.
How it works. Drop a clear photo of the obverse and reverse. The AI matches the coin against trained examples calibrated to PCGS and NGC grading, returns a 1–70 grade, a confidence band, and a short reasoning blurb. Free for unlimited use without an account.
Frequently asked questions
Is there a free online coin grader?
Yes — CoinGrader AI is a free online coin grader that runs entirely in your browser. Upload two photos (obverse and reverse) and you'll get a Sheldon-scale grade estimate with a confidence score in about 60 seconds. No signup, no credit card.
How accurate is an online AI coin grader?
Online AI graders trained on certified examples typically estimate within about 2 Sheldon points of the PCGS or NGC result on common U.S. coin types. They're more reliable than a beginner's eye, less reliable than an experienced numismatist handling the coin in person.
Do I need to install anything?
No. A web-based coin grader works on any modern browser — iPhone Safari, Android Chrome, desktop, or tablet — without installing an app.
Can I use an online grader to decide whether to submit to PCGS?
Yes — that's the main use case. Use the AI grade together with the PCGS Price Guide to estimate the coin's value at that grade. If the value comfortably exceeds the $40–$100 submission cost, certify it. If not, keep it raw or sell it.