Sumatra PDF is a PDF, ePub, MOBI, CHM, XPS, DjVu, CBZ, CBR reader for Windows

Ways to contribute / donate

NOTE Code contributions are most welcome see

How-to-contribute-translation
Join-the-project-as-a-developer

Some means to donate once (paypal) or sponsor as a patron via patreon.com have now been added see the top right image button on most web site pages

https://www.sumatrapdfreader.org/backers.html

This is really a great software,works well even for 400M files,butter smoooth. thanx sooo much
Is there any way to donate? I was looking in the software and this website, but havnt got.
Alipay will be better…
Thanx again DEVELOPER!

[Moderator’s note: This was the official response in 2017, but has changed now.]

Thanks for the offer but we don’t accept donations.

I have used this pgm for several YEARS! I want to contribute …

If you’re a developer or designer and want to contribute code or icons etc. I’m sure the dev will appreciate it.

For monetary contributions you can read the dev’s official response above.

Any way to donate? Sumatra is one of my favorite programs, and I recommend it to all my college student friends. I would love to be able to support the development of this excellent software .

Thanks for the offer, @Sam_S, but regarding monetary contributions you can read the dev’s official response above.

IMO code (especially) and icon contributions would be great however since this project really needs support to fix the numerous open GitHub issues, add new features etc.

@greatwork @jspence @Sam_S

You may note from the new heading that there is now the opportunity to support / donate if you wish to.