Background
Two modes: Fill replaces transparent pixels with a colour you pick (good before exporting to JPG, or for a coloured matte). Remove deletes pixels matching a colour (good for crude background removal — works best when the original background is a solid colour).
Drop image files here
Multiple files allowed
When to use this tool
Fill mode is for when you'll export to a format without alpha (JPG) and want a specific background colour rather than the default white. Remove mode is a crude background-removal — it works well for logos / icons on a solid background, less well for photos.
Tolerance
Tolerance controls how close a pixel must be to the picked colour to be considered "background." 0 = exact match only. 20 (default) handles slight anti-aliasing. 50+ starts removing chunks of foreground.
Use cases
- Logo extraction. Logo on white background → click the white in the colour picker → set tolerance ~30 → result has transparent background.
- Pre-JPG export. Fill PNG transparency with brand colour before encoding to JPG.
- Sprite cleanup. Remove the magenta key colour from old sprite assets.
FAQ
Why does my photo's background not come out cleanly?
Photo backgrounds aren't a single colour — they have shadows, gradients, and texture. This tool only handles solid-colour backgrounds. For photos, use a dedicated tool with AI segmentation.
What format is the output?
Always PNG (so transparency is preserved when removing colour).