iframe vs PDF.js 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, iframe has a higher user rating (4.4/5 from 56 reviews) and leads in active installations (70K+ vs 20K+). Both are free WordPress plugins. iframe has accumulated 1.9M+ total downloads while PDF.js Viewer has 407K+.
Detailed Comparison
| Metric | iframe | PDF.js Viewer | |
|---|---|---|---|
| Rating | 4.4/5 | 4.4/5 | |
| Total Reviews | 56 | ◄ | 53 |
| Active Installs | 70K+ | ◄ | 20K+ |
| Total Downloads | 1.9M+ | ◄ | 407K+ |
| Support Resolution | N/A | 50% | |
| Last Updated | 3 months ago | ► | 1 week ago |
| First Released | 2011 | 2013 | |
| Age | 15 years | 13 years | |
| WP Requires | 3.0+ | 5.0+ | |
| PHP Requires | false+ | 7.4+ | |
| Business Model | Free | Free | |
| Latest Version | 6.0 | 3.0.4 |
Rating Breakdown
iframe
PDF.js Viewer
Download Trends
Over the past 30 days, iframe averaged approximately 201 daily downloads while PDF.js Viewer averaged 693.
Recent Reviews
iframe Reviews
works just fine
I’ve been using this for several years to embed a public webcam livestream. And also using it to embed google docs. I download the google doc as html, put it on the same server where wordpress is, and
Like they said, it simply does NOT work AT ALL
It does not work AT ALL. You can enter all the shortcodes you like in as many widgets and text boxes as you like. And they do ABSOLUTELY NOTHING. This is total fakeware.
Fast Support and Easy to Use
An easy to use plugin with fast and practical support from its developer. More frequently and providing options to generate the shortcode on the posting page could make it even better! Thanks so much!
PDF.js Viewer Reviews
Never failed
I’ve been using for years and never failed. Simple to use and does the job.
Excellent PDF EMbedder
I have been usiong a paid pdf plugin but it’s been months now with a bad fault so i tried this – perfect! Thank you very much.
Great Support
I was impressed with the level of support provided with the recent issue where the plugin stopped displaying due to Mozilla’s PDFjs, and they started using mjs files. Thank you for an excellent plu
More Embed Worth Comparing
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Embed a PDF from the Media Library or elsewhere via oEmbed or as a block into an iframe tag.
A Compact WP Audio Player Plugin that is compatible with all major browsers and devices (Android, iPhone, iPad)
Frequently Asked Questions
Is iframe or PDF.js Viewer more popular?
Which has better ratings — iframe or PDF.js Viewer?
Are iframe and PDF.js Viewer free?
Which plugin has better support — iframe or PDF.js Viewer?
Which plugin is updated more frequently?
Plugin data sourced from WordPress.org. Comparison and analysis by PluginSift.