WebP Express vs Kas Viewer (2026)
Detailed side-by-side comparison of two WordPress plugins, based on real-time data from WordPress.org.
Quick Verdict
As of April 2026, Kas Viewer has a higher user rating (5/5 from 1 reviews) while WebP Express leads in active installations (300K+ vs 10). Both are free WordPress plugins. WebP Express has accumulated 4.1M+ total downloads while Kas Viewer has 3.8K+.
Detailed Comparison
| Metric | WebP Express | Kas Viewer | |
|---|---|---|---|
| Rating | 4.4/5 | ► | 5/5 |
| Total Reviews | 160 | ◄ | 1 |
| Active Installs | 300K+ | ◄ | 10 |
| Total Downloads | 4.1M+ | ◄ | 3.8K+ |
| Support Resolution | 0% | N/A | |
| Last Updated | 2 months ago | ◄ | 16 years ago |
| First Released | 2018 | 2010 | |
| Age | 8 years | 16 years | |
| WP Requires | 4.0+ | false+ | |
| PHP Requires | 5.6+ | false+ | |
| Business Model | Free | Free | |
| Latest Version | 0.25.14 | 1.0.2 |
Rating Breakdown
WebP Express
Kas Viewer
Download Trends
Recent Reviews
WebP Express Reviews
Good plugin
Good plugin. Thanks for the update.
Excelent and good free plugin
Excelent and good free plugin for convert images jpg/png a webp
Amazing
This stuff is the real deal: just an app that works, no hassling like premium versions or special features. Thank you.
Kas Viewer Reviews
No reviews yet
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Frequently Asked Questions
Is WebP Express or Kas Viewer more popular?
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Plugin data sourced from WordPress.org. Comparison and analysis by PluginSift.