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/ Converter for Media – Optimize images | Convert WebP & AVIF

Converter for Media – Optimize images | Convert WebP & AVIF

By Mateusz Gbiorczyk

Performance & Optimization / Image Optimization & Compression

Reviewed by Omar Dabbas

Trusted WordPress expert with 20+ years of experience evaluating plugins for the WP ecosystem.

Converter for Media – Optimize images | Convert WebP & AVIF Review - In-Depth Analysis

Speed up your website by optimizing images with WebP and AVIF formats. Reduce file sizes significantly without losing quality.

Performance Overview

WPS Score

6.81/10

User Rating

4.9/5 (based on 1099+ reviews)

Active Installations

500,000+

Update Frequency

Outstanding It is calculated using the weighted average of same category plugins.

Security Score

5.6 / 10 (Medium Risk) It is calculated using the weighted average of all versions.

What It Does

Speed up your website using our ease image optimizer by serving WebP and AVIF images. By replacing files in standard JPEG, PNG and GIF formats with WebP and AVIF formats, you can save over a half of the page weight without losing quality.

After installing the plugin, you can optimize your entire Media Library with a single click — no further action required. When image optimization finishes, every visitor will automatically receive new images with significantly reduced file sizes.

As of today, over 95% of users use browsers that support the WebP format. The loading time of your website depends to a large extent on its weight and the level of image optimization. Using our WebP Converter, now you can speed it up in a few seconds without much effort!

This will be a profit both for your users who will not have to download so much data, but also for a server that will be less loaded. Remember that a better optimized website also affects your Google ranking. Image optimization is very important.

Now in the PRO version you can use AVIF as the output format for your images. The AVIF format is a new extension — is the successor to WebP. Images converted to the AVIF format weigh about 50% less than images converted only to the WebP format, while maintaining better image quality.

Enjoy peace of mind knowing that AVIF is supported by over 90% of browsers. And if any visitor has an older browser, our plugin will automatically fall back to WebP — so every user gets fast, high-quality images without a hitch.

When a browser tries to load an image file, the plugin checks if it supports the AVIF format. If so, the browser will receive the equivalent of the original image in the AVIF format. If it does not support AVIF, but supports the WebP format, the browser will receive the equivalent of the original image in WebP format. In case the browser does not support either WebP or AVIF, the original image is loaded. This means full support for all browsers.

When you have just installed the plugin, you can optimize images with one click. Image size will be smaller after generating AVIF and WebP! New images that will be added to the Media Library will be converted automatically.

Our image optimizer does not modify your original images in any way. This means security for you and your files. Files converted to AVIF and WebP format are saved in a separate directory: /wp-content/uploads-webpc/.

Optimizing images and raising your website to a new level now! Install the plugin and enjoy the website that loads faster by image optimization. Surely you and your users will appreciate it.

Comparing to Alternatives

Converter for Media competes in a crowded field of image optimization and WebP/AVIF conversion plugins. It stands out through its rewrite-rule based conversion approach and strong agency-focused Pro features, though users have many alternatives to consider depending on their priorities around CDN, compression algorithms, or bundled optimization suites.

Top alternatives

Strengths

Uses rewrite rules rather than altering database URLs, which is considered safer and less invasive
Free version still offers genuine WebP conversion, a rarity among competitors
Highly rated support team praised repeatedly for fast, honest responses
Pro version adds AVIF support and integrates well with modern site builders like Bricks

Weaknesses

Has a longer vulnerability history than some newer competitors
Free version limits the number of images that can be converted

User Sentiment Analysis

With a 4.9/5 average across 1,099 ratings and 96% five-star reviews, sentiment is overwhelmingly positive. Only 2.1% of reviews fall into the 1-2 star range, and no negative reviews were available to analyze in detail, suggesting a very low rate of serious dissatisfaction.

Positive highlights

"The PRO version is a game-changer for Agencies! Worth every penny" — Jayron Castro
"A really great plugin and five-star support" — delemo
"Converter for Media is the best WordPress image management plugin I've used so far" — nico1972
"Your plugin is one of the few that still offers WebP conversion for free" — arianfar
"Great plugin, works great and Matt goes above and beyond to offer support" — redshoe12

Common complaints

Weaknesses

Past vulnerabilities include a high-severity CSRF issue and a recent unauthenticated SSRF flaw, though all have been patched
History of four disclosed vulnerabilities over several years may concern security-conscious users
No negative review data was available to identify recurring user frustrations

Who Should Use This?

Best for

Site owners and agencies wanting a straightforward, well-supported way to convert images to WebP or AVIF without altering their media database, especially those using modern builders like Bricks who value the Pro version's AVIF and performance features.

Not ideal for

Highly security-sensitive site owners who prioritize plugins with a completely clean vulnerability record, or users needing unlimited free conversions without upgrading to Pro.

Pricing & Value

Free version includes

The free version provides genuine WebP conversion functionality, which many competitors reserve for paid tiers, along with basic conversion tools and support, though the number of convertible images is limited.

Pro version (5 - 15 USD / month)

The Pro version adds AVIF format support, a rewrite-rule based delivery method instead of database URL changes, and integrates smoothly with page builders like Bricks, aimed particularly at agencies seeking performance gains on Core Web Vitals and PageSpeed scores.

Final Verdict

Converter for Media enjoys strong user satisfaction, backed by a 4.9-star average and praise for both its free WebP conversion and highly responsive support team. Its technical approach using rewrite rules rather than database manipulation appeals to agencies and developers who want safer, more maintainable image optimization, and the Pro version's AVIF support adds real value for performance-focused users.

The main caveat is its security history, with four disclosed vulnerabilities including a high-severity CSRF flaw and a more recent SSRF issue, both since patched. Given the strong support reputation and active maintenance, most users should feel comfortable provided they keep the plugin updated, but security-conscious buyers may want to weigh this against cleaner-history alternatives like WebP Express or ShortPixel.

Other Notable Features

Here are a few other notable features of this free Converter for Media – Optimize images | Convert WebP & AVIF plugin.

Compress Images

Convert Webp

Image Optimization

Optimize Images

Webp

Screenshots

FAQ

You can report security bugs through the Patchstack Vulnerability Disclosure Program. The Patchstack team help validate, triage and handle any security vulnerabilities.

Report a security vulnerability

This is possible using the following types of filters to change default paths. It is a solution for advanced users. If you are not, please skip this question.

Path to the root installation directory of WordPress (ABSPATH by default):

add_filter( 'webpc_site_root', function( $path ) {     return ABSPATH; } );

Paths to directories (relative to the root directory):

add_filter( 'webpc_dir_name', function( $path, $directory ) {     switch ( $directory ) {         case 'uploads':             return 'wp-content/uploads';         case 'webp':             return 'wp-content/uploads-webpc';         case 'plugins':             return 'wp-content/plugins';         case 'themes':             return 'wp-content/themes';     }     return $path; }, 10, 2 );

Note that the /uploads-webpc directory must be at the same nesting level as the /uploads, /plugins and /themes directories.

Prefix in URL of /wp-content/ directory or equivalent (used in .htaccess):

add_filter( 'webpc_htaccess_rewrite_path', function( $prefix ) {     return '/'; } );

For the following sample custom WordPress structure:

... ├── web     ...     ├── app     │   ├── mu-plugins     │   ├── plugins     │   ├── themes     │   └── uploads     ├── wp-config.php     ...

Use the following filters:

add_filter( 'webpc_site_root', function( $path ) {     return 'C:/WAMP/www/project/web'; // your valid path to root } ); add_filter( 'webpc_htaccess_rewrite_path', function( $prefix ) {     return '/'; } ); add_filter( 'webpc_dir_name', function( $path, $directory ) {     switch ( $directory ) {         case 'uploads':             return 'app/uploads';         case 'webp':             return 'app/uploads-webpc';         case 'plugins':             return 'app/plugins';         case 'themes':             return 'app/themes';     }     return $path; }, 10, 2 );

After setting the filters go to Settings -> Converter for Media in the admin panel and click the Save Changes button. .htaccess files with appropriate rules should be created in the directories /uploads and /uploads-webpc.

To exclude selected directories, provide them in the Excluded directories field in the Advanced Settings tab in the plugin settings.

In this field, you can enter a directory name or path. Here are examples:
– 2023
– 2024/01
– 2023,2024/01

To exclude selected files, use the following filter (in this case with the suffix “-skipped” in a filename, e.g. image-skipped.png):

add_filter( 'webpc_supported_source_file', function( bool $status, string $file_name, string $server_path ): bool {     $excluded_suffix = '-skipped';     if ( strpos( $file_name, $excluded_suffix . '.' ) !== false ) {         return false;     }     return $status; }, 10, 3 );

Argument $server_path is the absolute server path to a directory or file. Inside the filters, you can apply more complicated rules as needed.

Changes to excluded directories and files take effect before images are converted – they do not affect already converted images. These images must be manually removed from the directory: /wp-content/uploads-webpc/.

The plugin supports the following directories by default:
– /gallery
– /plugins
– /themes
– /uploads

If you want to add support for a custom directory, add the following code to the functions.php file in your theme directory (use a correct directory name instead of custom-directory):

add_filter( 'webpc_source_directories', function ( $directories ) {     $directories[] = 'custom-directory';     return $directories; } );

Remember that this directory must be located in the /wp-content directory.

By default, all images are converted when you click on the Start Bulk Optimization button. In addition, conversion is automatic when you add new files to your Media Library.

Remember that our plugin takes into account images generated by WordPress. There are many plugins that generate, for example, images of a different size or in a different version.

If you would like to integrate with your plugin, which generates images by yourself, you can do it. Our plugin provides the possibility of this type of integration. This works for all images in the /wp-content directory.

It is a solution for advanced users. If you would like to integrate with another plugin, it’s best to contact the author of that plugin and give him information about the actions available in our plugin. This will help you find a solution faster.

You can manually run converting selected files, you can use the action to which you will pass an array with a list of paths (they must be absolute server paths):

do_action( 'webpc_convert_paths', $paths, true );

An alternative method is to manually start converting the selected attachment by passing the post ID from the Media Library. Remember to run this action after registering all image sizes (i.e. after running the add_image_size function):

do_action( 'webpc_convert_attachment', $post_id, true );

To delete manually converted files, use the following action, providing as an argument an array of absolute server paths to the files (this will delete manually converted files):

do_action( 'webpc_delete_paths', $paths );

The plugin supports WP-CLI, which enables faster image conversion from the server level. More information on how to get started with WP-CLI can be found in the Handbook. The supported commands are described below.

Checking how many maximum images for conversion are on website:

wp converter-for-media calculate

Converting all images:

wp converter-for-media regenerate

Converting all images (with “Force convert all images again” option):

wp converter-for-media regenerate --force

Contributors and developers

“Converter for Media – Optimize images | Convert WebP & AVIF” is open source software. The following people have contributed to this plugin.

Mateusz Gbiorczyk

Pro version Free Version Docs

WPS

6.81

Average

Pro version

Ratings

4.9 out of 5 | 1099

Version

6.6.5

Last updated

1 month ago

Active installations

500,000+

WordPress version

7.1 or higher

PHP version

7.4 or higher

Languages

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Converter for Media – Optimize images | Convert WebP & AVIF Review - In-Depth Analysis

Performance Overview

What It Does

Comparing to Alternatives

User Sentiment Analysis

Who Should Use This?

Pricing & Value

Final Verdict

Other Notable Features

Screenshots

FAQ

Contributors and developers

Ratings

Reviews (1099)

Sort by:

Contributors & Developers

Interested in development?

Changelog

Security Status

Secure

No Unpatched Vulnerabilities

Known Vulnerabilities (4)

Previous Versions

WPS

6.81

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