Why a transparent PNG is useful
A picture with a white box around it looks wrong the moment it lands on a coloured slide, a dark website or a product label. Transparency removes that box, so the logo, signature or product sits directly on whatever is behind it. PNG is the safest format for this because every browser, office program and design tool reads its alpha channel, and it keeps edges crisp without the blocky artefacts JPEG adds around text and lines.
Making the white (or any colour) disappear
The tool above is the same background remover used across this site, set up for transparent output. Click the white area and the matching pixels vanish. If a pale halo is left around letters or around a product, raise the tolerance a few steps; if the subject begins to wash out, lower it again. The feather slider turns the hard cut into a smooth ramp, and the defringe step removes the white tint from semi-transparent edge pixels so the object does not carry a bright outline onto a dark background.
Typical jobs
- A company logo exported on white, needed on a coloured banner.
- A scanned signature that must sit on top of a PDF.
- A product photo shot on white paper for a catalogue or marketplace.
- A sticker, icon or clip-art file downloaded with a solid background.
Checking the result before you download
Drag the before and after slider across the picture. The right side shows a chequerboard behind the cutout, so you can see exactly what is transparent. White objects on a white background, such as a white shirt, will lose parts of the subject: keep the connected-areas option on so only the outer background is removed, and use the restore brush for anything that was taken by mistake. If the file will be used on the web, choose WebP instead of PNG for a much smaller transparent file.
Worked example: a logo block with a white window
Picture a 400 × 200 pixel PNG: a blue 200 × 100 block with a 40 × 40 white window cut into its middle, all sitting on white. Click the outer white with the default tolerance of 20 and feather of 10. With connected areas on, only the outside is cleared: the status reports 74% transparent and the window stays white. Untick the connected-areas option and every white pixel goes, window included, so the figure rises to 76%. Exactly 1,444 extra pixels become transparent: the 1,600 pixels of the window minus the soft one-pixel rim along its edge. The same thing happens inside letters such as O, A and e in a real logo.
Privacy
The picture is processed entirely in your browser. It is not uploaded, stored or seen by anyone else, so confidential artwork and signed documents are safe to use.
Frequently asked questions
Does a PNG have a transparent background by default?
No. A PNG only has transparency if its pixels were saved with an alpha value below fully opaque. Many PNG files contain a solid white background, which is why this tool removes it.
Why do I still see a faint white outline?
Anti-aliased edges blend the subject with the old background. Raise the feather a little and keep the defringe option on, which takes the white tint out of those edge pixels.
Can I make only one colour transparent?
Yes. Turn off the connected-areas option and the chosen colour is removed everywhere in the picture, including enclosed areas such as the inside of a letter O.
Will the file size change?
A cutout PNG is often similar in size to the original. Choose WebP in the download options if you want the same transparency with a noticeably smaller file.