What is free in this workflow
The basic conversion runs in your browser and can be downloaded without an account. It reduces the photo into lightly tinted square cells with numbers; it does not use AI to redraw objects. If you choose an optional AI enhancement elsewhere, it uses credits and uploads your image for processing. It is separate from this free browser conversion.
Use the numbered result as a photo reference
Cells group sampled colors, but this version does not include a separate numbered color key or paint-brand matching. Keep the original photograph available and choose your paints manually. The square structure is different from a commercial kit that traces irregular object regions. Try a small exercise before planning a detailed painting.
Check the print before starting
The paint conversion caps the longest edge at 960 pixels and exports PNG. It does not create vector outlines or PDF. Print a small test and inspect whether both pale cells and numbers remain readable.