Remove the background from a stamp
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A stamp or seal photographed on a document has flat ink on paper, which keys cleanly — the complication is that the paper often shows through the stamp itself.
Why these settings
Colour mode on the paper with connectivity off, so the paper visible inside the stamp's design clears along with the surrounding sheet.
Settings to start from
- How to find the background
- By colour
- Tolerance
- 30
- Only the area connected to the edges
- Off
- File type
- PNG — transparent, lossless
Step by step
- Drop a stamp onto the page, paste it, or choose the file.
- Apply the settings above — they are a starting point, not a rule.
- Check the edges at full size, and fix anything left with the brush.
- Choose transparent or a solid colour, then download.
What to watch out for
Ink density varies across a rubber stamp. The faint parts are closest to the paper in colour and will go first, so check the lightest areas before settling on a tolerance.
Common questions
What is the best way to remove the background from a stamp?
Use the settings above as a starting point, then check the edges at full size. Most of the work is choosing the right mode; the sliders only fine-tune it.
Is a stamp uploaded to a server?
No. It is decoded and processed entirely in your browser, and nothing is sent anywhere. There is no server to send it to.
Is there a watermark or a limit?
Neither. No watermark is added, there is no cap on how many images you process, and no account is needed.