ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF v6.5.5
Optimize images & PDFs smartly. Create and compress next-gen WebP and AVIF formats. Smart crop and resize.
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- Audit coverage Up to date 30 versions audited
- On Plugin Auditor since Sep 2, 2026
- Last audited Sep 2, 2026
Compatibility & requirements
The PHP and WordPress versions this plugin needs, and how current its version support is.
- Requires PHP 7.4+
- Requires WordPress 4.8.0+
- Tested up to WP 7.1 WP 7.1.3 is current
- Version adoption 64% run the current version
Audit scores by category
125 checksHow this plugin scores across the six areas we audit, from security to accessibility.
- 99 Passed
- 20 Warnings
- 6 Failed
29 of 37 checks passed.
55 of 61 checks passed.
9 of 12 checks passed.
3 of 6 checks passed.
1 of 3 checks passed.
2 of 6 checks passed.
Code footprint
How much code ships in this plugin, and the file types that make it up.
ZIP file size
2.5 MB
4.7 MB unzipped
Total files
404
across all file types
Lines of PHP
55,211
in 194 files Large
File types
- PHP
- SVG
- SCSS
- PNG
- Other
Top issues
The most important findings from the latest audit, ordered by severity.
- 0 Critical
- 10 High
- 210 Medium
- 49 Low
This is a preview of notable findings. Full file-level results, line numbers and code context are in the scan.
View full reportHow scores changed across versions
Across 30 audited versions of ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF, The largest regression was in Compatibility (-17). The codebase grew 29% in size.
Audited 6.0.1 → 6.5.5 · 30 versions
How issues changed across versions
Findings by severity for each audited version, so you can see which issues were fixed over time.
Download momentum
How fast this plugin is being installed lately, and whether that pace is rising or slowing.
Last 7 days
13,802
downloads
Today
2,070
downloads
Week over week
+4%
vs previous week
Month over month
−78%
vs previous month
Download trend: Declining. Abandonment risk: None.
Version intelligence
36% of installs run an older version
≈ 107.9K+ sites on a lower-scoring version.
- Other
- v6.4
- v6.5
Maintenance & history
How actively this plugin is kept up, from its last update to its release history.
Last updated
This month
Jul 21, 2026
Actively maintainedRelease cadence
~ every 9 days
average between releases
Total releases
250
since Nov 2014 · 12 yrs
Contributors & developers
The people credited with building and maintaining this plugin.
Running ShortPixel Image Optimizer in Your Site?
ShortPixel Image Optimizer and its trademarks are used only to identify the plugin analyzed and remain the property of their owners. This is an independent Plugin Auditor audit, not affiliated with, sponsored by, or endorsed by the plugin's developer. Metadata may come from WordPress.org; scores, findings, classifications, and visualizations are independently generated by Plugin Auditor. Full disclaimer.