1PDF

Thumbmark maker

To PDF

Remove the paper background from a thumb impression.

Drop your images here

JPG and PNG · up to 50 MB each

No files selected

Processed on your device.

Saved workspaces on this device

Files are saved only when you choose Save. Up to 5 workspaces and 200 MB total. Browser storage may be cleared; download important files separately.

    How it works

    1. 1Choose a JPG or PNG of the thumb impression.
    2. 2Set the background threshold and output size.
    3. 3Download the transparent PNG, or a PDF stamp.

    Originals stay unchanged. Save results before leaving, or explicitly save this workspace on your device. Manipulation tools require unlocked, flattened PDFs. Layout changes require pages without annotations or links. New outputs may lose bookmarks and digital signatures.