OurPDF

Thumbmark Maker

Photograph your thumbprint and get a clean transparent PNG for forms – nothing uploaded.

Runs in your browser · files never leave your device

How to use Thumbmark Maker

  1. 1

    Photograph your thumb or choose a photo.

  2. 2

    Adjust the options – the defaults work for most files.

  3. 3

    Download the updated PDF.

  • 100% in your browser – no upload
  • Free, no sign-up, no watermark
  • Works offline once loaded
  • Part of 67 private PDF tools

Questions & answers

Is Thumbmark Maker free?

Yes, completely free with no limits on the number of files and no watermark.

Are my files uploaded to a server?

No. Everything runs in your browser on your own device. Your documents are processed locally and never leave your computer or phone.

Does Thumbmark Maker work on mobile?

Yes. It works in any modern browser on Android, iPhone, Windows, macOS and Linux. Edit & Annotate tools also work offline after your first visit.

Photograph your thumbprint and get a clean transparent PNG for forms – nothing uploaded. OurPDF does this entirely inside your browser: nothing is uploaded, there is no account and no watermark.