Why text removal is an inpainting problem
Deleting text isn't like deleting a layer — the pixels underneath the letters simply don't exist in the file. So the real task is reconstruction: for each letterform, the model studies the surrounding surface and continues it through the gap, whether that surface is a smooth gradient, brick, skin, clouds, or bokeh.
Simple backgrounds recover invisibly. Text over busy, non-repeating detail — a headline across a crowd, a caption over intricate architecture — is where you should zoom in and check, and occasionally run a second cleanup pass on a stubborn patch.
Masking letters properly
Letters are bigger than they look. Anti-aliasing spreads each glyph a pixel or two beyond its apparent edge, and many designs add drop shadows, outlines, or glows that extend further still. Mask past the visible letter edges generously — leftover halo pixels are the number one cause of ghostly, smudged results.
For text over a complicated area, work one line at a time instead of masking the whole block. Each smaller pass keeps more clean context around the mask, which directly improves how convincingly the surface rebuilds.
What people use it for
Marketers refresh assets they can't rebuild: strip the expired '20% OFF ENDS FRIDAY' from a banner whose source file is long gone, then set new copy on the clean image. YouTubers clear old titles off thumbnails to test new ones. Social managers clean captions off graphics they want to repost in a new format.
It also preps images for design work — clearing embedded lettering from a photo so you can lay proper typography over it, or removing a timestamp from a scanned print before it goes into an album or a listing.