What powers sumatrapdfreader.org?
Last seen Jun 2026 · 4 technologies across 4 categories
CDN
JavaScript frameworks
Miscellaneous
UI frameworks
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| sumatra | #2 | 5,400 |
| sumatra pdf | #1 | 2,000 |
| free pdf viewer | #4 | 980 |
| adobe viewer | #17 | 710 |
| pdf reader | #10 | 370 |
| pdf reader | #10 | 370 |
| sumatra pdf | #5 | 310 |
| free pdf reader software | #7 | 310 |
| adobe acrobat reader | #26 | 230 |
| free pdf file reader | #9 | 220 |
| sumatra pdf viewer | #1 | 220 |
| sumatra pdf reader | #1 | 220 |
| pdf reader free | #8 | 220 |
| sumatra pdf | #7 | 170 |
| pdf reader software free download | #5 | 140 |
| pdf reader software free download | #5 | 140 |
| open pdf | #6 | 120 |
| adobe viewer download | #26 | 100 |
| ebook reader | #74 | 100 |
| ebook reader | #68 | 100 |
| pdf application | #7 | 92 |
| pdf application | #7 | 92 |
| pdf reader download | #6 | 81 |
| pdf reader download | #6 | 81 |
| sumatra pdf viewer | #3 | 70 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
Audience
- 90% desktop
- 10% phone
Italy
Mexico
Argentina
Vietnam
Iran
Pakistan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
7.02 / 10 · ranked #40,765 of all domains
692 referring domains · OpenPageRank
Search traffic
15,500 est. monthly organic visits (US)
2,392 keywords in Google's top 30
Core Web Vitals
| LCP | 1.1 s |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: English
- Weight: 0.3 MB · 16 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| online.sumatrapdfreader.org | 4 |
| forum.sumatrapdfreader.org | 2 |
| www.sumatrapdfreader.org | 2 |
Full technology history →
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Recent changes
- dropped Caddy Feb 2026