Description
Image Format Converter is a powerful, lightweight administrative tool that allows you to easily convert images in your WordPress Media Library to modern formats like WebP and AVIF, as well as standard PNG and JPG formats.
By leveraging your server’s native PHP image processing libraries (GD or Imagick), this plugin converts images with high quality and optimal compression. With the newly added AJAX-powered engine, you can now select and convert multiple images at once, watch their progress in real-time with an animated progress bar, and see exactly how many kilobytes and storage percentage you saved.
Features:
* AJAX Bulk Conversion: Select multiple images from the Media Library and convert them sequentially. Prevents script timeouts on large libraries.
* Proportional Resizing: Set optional maximum width or height constraints to scale down high-resolution images during conversion.
* Media Library Row Action: Convert images directly from the Media Library list view (upload.php) with a quick “Convert Format” link.
* Size Savings Calculator: Shows original size, converted size, and total storage savings in real-time.
* Metadata Control (EXIF Stripping): Clean up extra file space by stripping camera EXIF profiles and color data when using Imagick.
* Auto-Delete Original: Clean up your server automatically by deleting the original image file and database attachment after a successful conversion.
* Flexible settings: Configure JPEG quality, PNG compression levels, WebP/AVIF quality, and toggle Media Library registration.
* Server Diagnostics: View library status (GD, Imagick, WebP, AVIF) at a glance, with step-by-step instructions to enable missing libraries.
Access all features by going to Media > Image Converter.
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Screenshots
Media > Image Converter with modern conversion form, toggle buttons, and success notice. 
Media > Image Converter with GD/Imagick instructions visible. 
Installation
- Upload the
image-format-converterfolder to the/wp-content/plugins/directory. - Activate the plugin through the Plugins menu in WordPress.
- Go to Media > Image Converter to start converting images, customize settings, or check your server configuration.
FAQ
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Where do converted images appear?
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Converted images are saved in your uploads folder (e.g.,
wp-content/uploads/2025/09/) with “_converted” appended (e.g.,image_converted.png). If enabled (default), they appear in Media > Library. The success notice shows “Image convert complete” with links to the file and Media Library entry. -
Why don’t I see the converted file?
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Check the success/error notice on Media > Image Converter. Ensure GD or Imagick is enabled (see library status). Verify the uploads folder is writable (755/644 permissions). Check Media > Library.
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What do I do if I see “GD: Not Available | Imagick: Not Available”?
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Click the “How to Enable GD and Imagick” button for instructions. Summary:
– Shared Hosting: Enable “gd” or “imagick” in cPanel/Site Tools under PHP Extensions. Contact support if needed.
– Local (XAMPP/WAMP/MAMP): Editphp.inito uncommentextension=gdor addextension=imagickafter installing ImageMagick.
– VPS (Ubuntu/CentOS): Installphp-gdorphp-imagick, restart Apache.
– Cloud (AWS, DigitalOcean): Install extensions or contact support.
– Verify: Use Tools > Site Health > Info > Server or createinfo.phpwith<?php phpinfo(); ?>. -
Does it support AVIF/WebP?
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Yes, if GD (PHP 8.1+ for AVIF, 7.1+ for WebP) or Imagick supports them. Check the library status on the conversion page.
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- Open Developer Tools (F12 > Console) for errors like “jQuery is not defined”.
- Ensure
wp-content/plugins/image-format-converter/admin/js/imgfmt-admin.jsexists (permissions 644). - Deactivate other plugins and switch to a default theme (e.g., Twenty Twenty-Five).
- Clear browser cache or test in incognito mode.
- Enable
WP_DEBUGinwp-config.phpand checkwp-content/debug.log. - Verify jQuery loads (F12 > Network > JS).
- In XAMPP, ensure Apache is running and file paths are correct.
- Contact support with console errors.
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Can I convert multiple images?
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Yes, you can select multiple images using the media uploader. The plugin will convert them sequentially using AJAX and display a live progress bar.
Reviews
There are no reviews for this plugin.
Contributors & Developers
“Image Format Converter” is open source software. The following people have contributed to this plugin.
Contributors
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Interested in development?
Browse the code, check out the SVN repository, or subscribe to the development log by RSS.
Changelog
1.1.0
- Added AJAX-powered sequential image conversion for single and bulk files.
- Added support for selecting multiple images in the media library uploader.
- Added live conversion progress wizard with an animated progress bar.
- Added overall statistics summary for bulk processing (total original, converted size, and storage percentage saved).
1.0.3
- Added quick “Convert Format” action links directly in the Media Library list view.
- Added setting to strip EXIF/IPTC image metadata when using Imagick.
1.0.2
- Added optional image resizing and dimensions control.
- Added size reduction and storage savings statistics calculator in success notices.
- Added optional “Delete original image after conversion” setting.
- Fixed admin notice display bug where messages did not persist across redirects.
1.0.1
- Added success message “Image convert complete” after conversion.
- Added AVIF format support (requires PHP 8.1+ with GD/Imagick AVIF enabled).
- Updated library check and UI to include AVIF.
- Updated prefix to
imgfmtfor uniqueness, per WordPress.org review. - Set Plugin URI to public GitHub repository.
- Fixed input validation for security compliance.
- Ensured compatibility with WordPress 6.8.
1.0.0
- Initial release with modern UI, collapsible settings, and GD/Imagick instructions.