SumatraPDF new features: April 8, 2026

New in the SumatraPDF pre-release builds:

Password-protected comic books

Password-protected CBZ / CBR files can be opened (#95). The password dialog has a Show password checkbox.

The password dialog for an encrypted CBZ file, with Show password checked

Tips on the home page

The home page shows a random tip with clickable links and keyboard shortcuts. Click the tip to see another one. Turn tips off with the ShowTips setting (#5515).

A tip at the bottom of the home page, with a link to the command palette

Manga mode and outline for all formats

Toggle Manga Mode works for PDF and other document types, not only comic books (#5498). Show Document Bookmarks (previously Show PDF Outline) works for every format that has a table of contents.

Smaller behavior changes

ZoomIncrement can be as small as 1 (#4931).
Downloaded files are no longer marked as coming from the internet when opened, so Windows shows their previews.

More: changes from April 8, 2026 and the full changelog.

SumatraPDF	small, fast, free PDF / ePub / comic book reader for Windows
Sumatra File Manager	fast, small file manager for Windows