Comprehensive image optimization with WebP, AVIF, Lazy Load, and more. Optimize images automatically for Faste...
Free
1M+ installs 4.8★ (1,838)
Plus WebP or AVIF
Generate WebP or AVIF.
The facts
- Rating
- 4.6★ from 26
- Active installs
- 5k+
- Price
- Free
- Last updated
- 25 Aug 2026
- Added
- May 2019
- Requires WP
- 6.6
- Tested up to
- WP 7.1
- Requires PHP
- 8.1
- Downloads
- 77,620
Our analysis
AI-assistedPlus WebP or AVIF is a WordPress plugin that generates WebP or AVIF image files when you add images to the Media Library. It can also replace existing images with these formats and delete the original files, updating all URLs in the content accordingly.
This plugin includes WP-CLI support for users with a large number of files, allowing for more reliable processing through command line commands. It is suitable for those looking to optimise images on their WordPress sites by converting them to more efficient formats.
Best for: This plugin is best for WordPress site owners who want to optimise their images for better performance.
What it does well
- ✓Generates WebP or AVIF images from uploads
- ✓Can replace original images and update URLs
- ✓Includes WP-CLI commands for batch processing
- ✓Supports async/await for image generation
Where it falls short
- •Limited information on specific features and performance
- •Requires PHP version 8.1
Verdict
Plus WebP or AVIF provides a straightforward solution for image optimisation, particularly for those comfortable with using WP-CLI commands. However, users should consider the PHP requirement and the limited feature details.
From the developer
Katsushi Kawamori's own description of Plus WebP or AVIF, lightly tidied.
Generate WebP or AVIF
- Generate WebP or AVIF file when adding image file in Media Library.
- Generate WebP or AVIF from all the images by async/await.
- Optionally, Can replace image files with WebP or AVIF when adding new media, and delete the original image file. Also, when generating all images, the original image file ID will be overwritten as WebP or AVIF and the original image file will be deleted. All URLs in the content are also replaced.
Wp-cli
WP-CLI commands are available. If you have a large number of files, WP-CLI commands is more reliable.
* wp pluswebpavif
* wp pluswebpavif webp -> Generated WebP.
* wp pluswebpavif avif -> Generated AVIF.
* wp pluswebpavif help -> Specification of this command.
* wp pluswebpavif webp mail -> Send results via email.
* wp pluswebpavif webp replace -> WebP or AVIF replacement of images and contents.
* wp pluswebpavif avif addext -> Append the webp or avif extension to the original filename.
* wp pluswebpavif webp --pid=12152 -> Process only specified Media ID(Conversion source ID).
* wp pluswebpavif avif --quality=90 -> Specifies the quality of WebP or AVIF.
* wp pluswebpavif webp --types=image/png,image/gif -> MIME type to convert.
How it works
Filter hooks
/** ==================================================
* Filter for advanced change database.
* If you want to replace other databases besides content.
*/
add_filter(
'plus_webp_advanced_change_db',
function( $before_url, $after_url ) {
/* Your processing */
return array( $before_url, $after_url );
},
10,
2
);
Tagged as
feature
WP-CLI Support
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