sumatrapdfreader/sumatrapdf

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SumatraPDF reader

Stars: 17.6k
Forks: 2k
Open beginner issues: 0
Indexed issues: 66
Avg merge: 7h 23m
Merged PRs (30d): 8

Dominant language: C
License: GPL-3.0
Last GitHub push: Sep 19, 2026
Latest indexed: Sep 20, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

Open All

65 open issues indexed

Mirror (flip) the page view horizontally and print mirrored Open

printing

Difficulty 5/5 Over a week Newbie friendliness 45/100

sumatrapdfreader/sumatrapdf#6221 · Opened Sep 19, 2026
Performance improvement in pdf_try_load_font() Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

sumatrapdfreader/sumatrapdf#6182 · 7 comments · 1 reaction · Opened Sep 11, 2026
Custom print dialog Open

printing

Difficulty 5/5 Over a week Newbie friendliness 25/100

sumatrapdfreader/sumatrapdf#6179 · 1 comment · 1 reaction · Opened Sep 11, 2026
Poster print: one page across multiple sheets Open

printing

Difficulty 5/5 Over a week Newbie friendliness 45/100

sumatrapdfreader/sumatrapdf#6177 · 1 comment · Opened Sep 11, 2026
In comic book option to setup a shadow for double page layouts Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

sumatrapdfreader/sumatrapdf#6141 · 1 comment · Opened Sep 6, 2026
Add Merge PDF to command palette Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

sumatrapdfreader/sumatrapdf#6070 · 1 comment · Opened Aug 27, 2026
Add header/footer in PDF Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

sumatrapdfreader/sumatrapdf#6051 · 3 comments · 1 reaction · Opened Aug 25, 2026
Add enough JavaScript handling for highlight Open

Difficulty 5/5 Over a week Newbie friendliness 28/100

sumatrapdfreader/sumatrapdf#6026 · 2 comments · Opened Aug 22, 2026
Library feature for ebooks Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

sumatrapdfreader/sumatrapdf#5953 · 6 comments · Opened Aug 16, 2026
Translation: Add translation inside Sumatra Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

sumatrapdfreader/sumatrapdf#5936 · 4 comments · Opened Aug 12, 2026
support more css properties in epub Open

ebook mupdf

Difficulty 5/5 Over a week Newbie friendliness 25/100

sumatrapdfreader/sumatrapdf#5826 · 6 comments · 2 reactions · Opened Jul 25, 2026
bookmarks sidebar supported automatic collapsing Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

sumatrapdfreader/sumatrapdf#5819 · 6 comments · Opened Jul 23, 2026
Historical records need to show complete covers, and now covers are all cut in half. Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

sumatrapdfreader/sumatrapdf#5817 · 2 comments · Opened Jul 21, 2026
epub files, support linear="no" attribute in the .opf Open

ebook

Difficulty 4/5 3-5 days Newbie friendliness 48/100

sumatrapdfreader/sumatrapdf#5803 · Opened Jul 13, 2026
Add favourite using context menu Open

Difficulty 3/5 1-2 days Newbie friendliness 58/100

sumatrapdfreader/sumatrapdf#5725 · 3 comments · Opened Jun 23, 2026
Exponential scroll via middle mouse button Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

sumatrapdfreader/sumatrapdf#5700 · 2 comments · Opened Jun 18, 2026
OCR / Barcode reading Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

sumatrapdfreader/sumatrapdf#5446 · 7 comments · Opened Mar 30, 2026
Write comment (annotation) on rotated document Open

annotations mupdf

Difficulty 4/5 3-5 days Newbie friendliness 48/100

sumatrapdfreader/sumatrapdf#5191 · 3 comments · Opened Dec 2, 2025
Support key sequences Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

sumatrapdfreader/sumatrapdf#5093 · Opened Sep 12, 2025
Brightness-contrast Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

sumatrapdfreader/sumatrapdf#4788 · 5 comments · 2 reactions · Opened Feb 1, 2025
Highlighting multiple lines overlap even though opacity is at 100% Open

annotations

Difficulty 4/5 3-5 days Newbie friendliness 55/100

sumatrapdfreader/sumatrapdf#4545 · 8 comments · Opened Sep 22, 2024
Ruby character support in EPUB viewer Open

ebook mupdf

Difficulty 4/5 3-5 days Newbie friendliness 45/100

sumatrapdfreader/sumatrapdf#4476 · 2 comments · 1 reaction · Opened Aug 15, 2024
Printing Enhancement Open

printing

Difficulty 4/5 3-5 days Newbie friendliness 45/100

sumatrapdfreader/sumatrapdf#4375 · 7 comments · 1 reaction · Opened Jul 14, 2024
Read Mode with Annotation Open

annotations

Difficulty 5/5 Over a week Newbie friendliness 25/100

sumatrapdfreader/sumatrapdf#4305 · 4 comments · Opened Jun 7, 2024
Installer should remember settings Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

sumatrapdfreader/sumatrapdf#4291 · 3 comments · Opened May 29, 2024
PDF rendering problem Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

sumatrapdfreader/sumatrapdf#4225 · 7 comments · Opened May 9, 2024
Customize Page Setup for e-book formats Open

ebook

Difficulty 5/5 Over a week Newbie friendliness 35/100

sumatrapdfreader/sumatrapdf#4210 · 2 comments · Opened May 1, 2024
Multi-column page layout Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

sumatrapdfreader/sumatrapdf#4184 · 11 comments · 4 reactions · Opened Apr 13, 2024
Add paper texture in background and reading mode Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

sumatrapdfreader/sumatrapdf#4141 · 6 comments · Opened Mar 20, 2024
Printed paper has scrambled colors does not respect the color in pdf (and scale) Open

printing

Difficulty 4/5 3-5 days Newbie friendliness 42/100

sumatrapdfreader/sumatrapdf#4132 · 4 comments · Opened Mar 14, 2024
Implement popup properties of symbols Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

sumatrapdfreader/sumatrapdf#3940 · 3 comments · Opened Dec 8, 2023
Slow rendering of large vector PDF Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

sumatrapdfreader/sumatrapdf#3842 · 1 comment · 2 reactions · Opened Nov 3, 2023
Sumatra not respecting set touchpad scroll speed settings. Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

sumatrapdfreader/sumatrapdf#3755 · 6 comments · Opened Oct 9, 2023
scrolling behavior very sporadic when using TPMouse Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

sumatrapdfreader/sumatrapdf#3743 · 3 comments · Opened Oct 3, 2023
Option for grouping "Frequently read" tiles Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

sumatrapdfreader/sumatrapdf#3734 · 3 comments · Opened Sep 26, 2023
Bad UI for chm file (autohotkey docs) Open

Difficulty 3/5 1-2 days Newbie friendliness 30/100

sumatrapdfreader/sumatrapdf#3604 · 7 comments · Opened Aug 6, 2023
Manually assign the "content" box Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

sumatrapdfreader/sumatrapdf#3585 · 6 comments · Opened Jul 24, 2023
Better printing settings dialog Open

printing

Difficulty 5/5 Over a week Newbie friendliness 35/100

sumatrapdfreader/sumatrapdf#3216 · 24 comments · Opened Jan 11, 2023
Inconvenient text format after copying. Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

sumatrapdfreader/sumatrapdf#3199 · 4 comments · 2 reactions · Opened Dec 26, 2022
"Textured" PDF - rounding errors when zooming Open

mupdf

Difficulty 4/5 3-5 days Newbie friendliness 35/100

sumatrapdfreader/sumatrapdf#3166 · 3 comments · Opened Dec 8, 2022
Feature request: Support for animated gifs in cbz files Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

sumatrapdfreader/sumatrapdf#3056 · 3 reactions · Opened Oct 25, 2022
Manual order in favorites Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

sumatrapdfreader/sumatrapdf#2813 · 1 comment · Opened Jul 20, 2022
Ability to see document in 2 views Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

sumatrapdfreader/sumatrapdf#2810 · 6 comments · Opened Jul 19, 2022
Disable fixed page size in ebook. Open

ebook

Difficulty 4/5 3-5 days Newbie friendliness 45/100

sumatrapdfreader/sumatrapdf#2755 · 1 comment · 2 reactions · Opened Jun 25, 2022
Support JavaScript inside PDFs Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

sumatrapdfreader/sumatrapdf#2754 · 17 comments · 3 reactions · Opened Jun 25, 2022
Publish in windows app store Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

sumatrapdfreader/sumatrapdf#2567 · 2 comments · 1 reaction · Opened May 11, 2022
Better view for text files, source code files. Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

sumatrapdfreader/sumatrapdf#2564 · 2 comments · Opened May 11, 2022
Hex view Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

sumatrapdfreader/sumatrapdf#2563 · 2 comments · Opened May 11, 2022
Support video files Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

sumatrapdfreader/sumatrapdf#2561 · 2 comments · Opened May 11, 2022
Leading Space and Blank Lines Not Copied Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

sumatrapdfreader/sumatrapdf#2423 · 13 comments · Opened Mar 17, 2022

sumatrapdfreader/sumatrapdf

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