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Sumatrapdf Alternatives
Similar projects and alternatives to sumatrapdf
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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LibreOffice
Read-only LibreOffice core repo - no pull request (use gerrit instead https://gerrit.libreoffice.org/) - don't download zip, use https://dev-www.libreoffice.org/bundles/ instead (by LibreOffice)
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ShareX
ShareX is a free and open-source application that enables users to capture or record any area of their screen with a single keystroke. It also supports uploading images, text, and various file types to a wide range of destinations.
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ONLYOFFICE
ONLYOFFICE Docs is a free collaborative online office suite comprising viewers and editors for texts, spreadsheets and presentations, forms and PDF, fully compatible with Office Open XML formats: .docx, .xlsx, .pptx and enabling collaborative editing in real time.
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scroll
Scroll is a language for scientists of all ages. Scroll includes a command line app that builds static blogs, websites, CSVs, text files, and more.
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GitExtensions
Git Extensions is a standalone UI tool for managing git repositories. It also integrates with Windows Explorer and Microsoft Visual Studio (2015/2017/2019).
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chai
chai - Experience Zero Trust security with Chai! Convert and view documents as vivid images right in your browser. No mandatory downloads, no hassle—just pure, joyful security! 🌈 (by DO-SAY-GO)
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NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a better sumatrapdf alternative or higher similarity.
sumatrapdf discussion
sumatrapdf reviews and mentions
Posts with mentions or reviews of sumatrapdf.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2026-03-26.
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We Rewrote JSONata with AI in a Day, Saved $500K/Year
Fixing bugs is the goldilocks zone for ai. Especially if you have a test that the agent can use to test their fix.
AI is not a junior developer, as some analogise, but Rain Man. Ultra autistic entity that can chew through way more logical conditions that you.
As long as you can describe the bug well ai will likely fix it. Logs help.
Let me give you specific example.
Here's a fix made by claude to my SumatraPDF: https://github.com/sumatrapdfreader/sumatrapdf/commit/a571c0...
I have a crash reporting system that sends me crash information in text file: callstack of crashed thread, basic os info and logs of this execution.
The way I (well, claude) fixed this bug is: I said "analyze crash report: " and it does it in under a minute.
Recently I've fixed at least 30 bugs with this process (you can view recent checkins).
Those are crashes that I found hard to fix because even though by human standard I'm both expert developer and expert Windows API developer.
But I'm not an autistic machine that can just connect the dots between how every windows api works and how it ties to the callstack and information from the log, in under a minute.
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Eight More Months of Agents
Not to take away from your experience but to offer a counterpoint.
I used claude code to port rust pdb parsing library to typescript.
My SumatraPDF is a large C++ app and I wanted visibility into where does the size of functions / data go, layout of classes. So I wanted to build a tool to dump info out of a PDB. But I have been diagnosed with extreme case of Rustophobiatis so I just can't touch rust code. Hence, the port to typescript.
With my assistance it did the work in an afternoon and did it well. The code worked. I ran it against large PDB from SumatraPDF and it matched the output of other tools.
In a way porting from one language to another is extreme case of refactoring and Claude did it very well.
I think that in general (your experience notwithstanding) Claude Caude is excellent at refactorings.
Here are 3 refactorings from SumatraPDF where I asked claude code to simplify code written by a human:
https://github.com/sumatrapdfreader/sumatrapdf/commit/a472d3...
- I Hate Acrobat
- Case study of over-engineered C++ code
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MuPDF WASM Viewer Demo
I’m curious, have you tried SumatraPDF (uses muPDF under the hood)?
https://github.com/sumatrapdfreader/sumatrapdf
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SumatraPDF Reader
Do you mind reporting those issues either to SumatraPDF at https://github.com/sumatrapdfreader/sumatrapdf/issues or directly to MuPDF at https://bugs.ghostscript.com/ if it also has the same issue? Thank you!
There are many wonderfully weird PDFs and epubs out there, but we do our best to fix issues. :)
- JPEG XL in EPUBs and PDFs?
- EPUB 3.3 becomes a W3C recommendation
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FSF Slams Google over Dropping JPEG-XL in Chrome
FWIW, https://github.com/sumatrapdfreader/sumatrapdf/issues/1249 ("Support form filling for at least 1040 irs form") has a comment saying "MuPDF-GL has the capability to edit fields and save the PDF" of a 1040.
I have just learned the Firefox 93 added support XFA - https://techdows.com/2021/10/open-xfa-pdfs-in-firefox.html .
So it would appear there are free software solutions to XFA forms.
Just because something doesn't seem far-fetched to you, doesn't mean most people will regard it as far-fetched.
Many people all sorts of "sectarian objections" - far more than there are SovCits or other tax protesters. Stallman has never come across as a tax protester. Ergo, I think it's far-fetched that "sectarian objections" is strongly associated with tax protests.
Further, at https://stallman.org/archives/2017-may-aug.html we can read Stallman opinine that we need to "return to the "bad old days", when Americans in general could have a decent life, not penury; when the US could afford to build what the public needed instead of privatizing everything with a toll" by making taxation more progressive. At https://stallman.org/archives/2011-jan-apr.html we read he supports "The Fairness in Taxation Act [which] would raise taxes to 45% on incomes over a million dollars a year."
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firefox users stay winning
link for the lazy
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A note from our sponsor - SaaSHub
www.saashub.com | 12 Aug 2026
Stats
Basic sumatrapdf repo stats
48
17,282
10.0
5 days ago
sumatrapdfreader/sumatrapdf is an open source project licensed under GNU General Public License v3.0 only which is an OSI approved license.
The primary programming language of sumatrapdf is C.
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