WordPress plugin comparison
Issuu PDF Sync vs PDF.js Viewer
At a glance
- PDF.js Viewer has more active installs: 20K+, against 800+ for Issuu PDF Sync.
- On a typical day, PDF.js Viewer is downloaded about 368 times, Issuu PDF Sync about 14.
- PDF.js Viewer is rated higher: 4.4 out of 5 from 53 reviews, against 2.3 from 9 reviews.
- PDF.js Viewer was updated more recently: Oct 26, 2026, against Apr 9, 2018 for Issuu PDF Sync.
- PDF.js Viewer is tested with a newer WordPress: 7.0.8, against 4.9.35 for Issuu PDF Sync.
- Issuu PDF Sync has been around longer: since 2011, against 2013 for PDF.js Viewer.
Line by line
PDF.js Viewer leads on 7 of 7 comparable lines.
| Metric |  Issuu PDF Sync |  PDF.js Viewer |
|---|---|---|
| Popular rank | #7,303 | #1,181 |
| Active installs | 800+ | 20K+ |
| Downloads, last 30 days | 316 | 14.7K |
| Rating | 2.3(9) | 4.4(53) |
| Support threads resolved | – | 0% |
| Tested up to | 4.9.35 | 7.0.8 |
| Search multiplier | ×0.00 | ×0.89 |
| Last release | 8 years ago | 15 days ago |
| Requires PHP | – | 7.4 |
From WordPress.org's public data, refreshed every night. Downloads are WordPress.org's official daily figures for the last 30 days.
Tags they share
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