Ray On is a free web application for viewing and analyzing optical rayset data entirely in the browser. Import ray files, visualize millions of rays in 3D, and compute intensity, plane irradiance, and camera radiance. Your data stays on your device — no server-side processing, tracking, cookies, or analytics.
Supported formats include Speos (.ray), LucidShape (.ray), TracePro (.ray, .dat, .bin), Zemax (.bin, .dat), LightTools (.ray, .dat, .bin), ASAP (.dis), IES TM-25 (.tm25ray), Photopia (.rir), FRED (.ray), OptiCAD (.ray), SimuLux (.ray), Generic Binary (.dat), and ASCII/CSV ray data.