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Free browser-based tools to test gold bullion authenticity. Run multiple tests and get a certified measurement report to share with buyers on any platform.
Run our free tests, then get a permanent, shareable certificate for just €5. Each certificate includes a QR code, full test breakdown, and detailed measurements — perfect for eBay, Facebook Marketplace, forums, or in-person sales.
Step-by-step wizard through all 3 tests — dimensions, weight, and acoustic ping. Generates a shareable verification certificate at the end.
A 0–100 consistency score: how closely your measurements match the published specifications. It is not a probability that the coin is genuine.
View Score →Enter diameter, thickness, and weight measurements and compare them with the official specifications.
Measure →Uses your microphone and the Web Audio API to capture the acoustic ring of a coin. Real-time FFT analysis matches frequencies.
Test a Coin →Suggests a match from the photo's colour among 146 reference coins; confirm it by hand.
Identify →Measure coin diameter and thickness using your phone camera and a reference object of known size.
Measure →Check your coin photo for sharpness, lighting, and colour before running Coin ID. Improves the match.
Check Photo →A comprehensive guide explaining why authentication matters, acoustic testing, dimensional verification, and the complete EON testing protocol.
Read Guide →