Sumrat PDF Reader
sumatrapdfreader/sumatrapdf
An open-source alternative to Adobe Acrobat.
SumatraPDF reader (from the repository)
- Stars
- 17,798
- Licence
- GPL-3.0
- Last push
- 2026-10-18
- Written in
- C
Is it alive?
Four readings from the repository, each with the rule behind it. No blended score.
Activity
Active
Last push 9 days ago
Active: pushed within 90 days. Slowing: within a year. Quiet: longer.
Releases
Older
3.6.1rel, 7 months ago
Recent: a tagged release within six months. Some projects ship from the main branch and never tag.
Issues
99% closed
43 open · 4,465 closed
Share of all issues ever filed that are now closed. Under 20 issues is too few to read.
Momentum
+71 in 9 days
17,798 stars
Change in stars across our daily readings, over up to 30 days. Needs a week of readings.
What a business may do with it
CopyleftGPL-3.0
Free to run in-house. Distribute it, or software built on it, and that source must be released under the GPL too.
This describes the licence family GitHub identified, not legal advice about this project. The repository’s own LICENSE file is what binds you.
Run it yourself
Sumrat PDF Reader’s README does not show a docker run, docker compose up or helm install in a code block, so this page will not guess one. It may be a desktop app, a library, or documented on its website.
Where this page comes from
- Stars, licence, activity, issues, releases and the self-host command are read from the repository. 2026-10-19
- The pairing with Adobe Acrobat and the category come from opensourcealternative.to, a community directory of open-source alternatives. We re-read it weekly.
- Star momentum comes from our own daily readings of the repository. How we collect data