DazhLight

DazhLight is a single offline HTML application that evens out exposure and colour-balance flicker across 2–300 numbered PNG or JPEG frames. You draw one to three static reference boxes on the set, mark frames where a lighting change was deliberate, and exclude boxes on frames where something covers them. It then exports corrected 8-bit PNGs plus settings, gain values and a local HTML report with a brightness graph.

The limits are stated plainly: opaque 8-bit RGB PNG or three-component JPEG only, no RAW, TIFF, HEIC or video; gains capped at 0.5–2.0; it cannot fix camera movement, local shadows, LED banding or clipped highlights. Only desktop Chrome 152 on Linux was tested. There is no autosave, so you keep the source frames and exported settings yourself. Processing runs locally.

Why no subscription? $19 USD once for the purchased version, perpetual use. Paddle is merchant of record and shows the final total and tax at checkout; download access depends on a private recovery code. No updates or email delivery are promised.