Description
Image Format Converter allows administrators to convert images in the WordPress Media Library between JPG/JPEG, PNG, WebP, and AVIF formats. Using server-side PHP libraries (GD or Imagick), it ensures high-quality conversions with minimal file size. Converted images are saved to the uploads folder and optionally added to the Media Library.
Features:
– Select images via the WordPress media uploader.
– Choose target format (JPG, PNG, WebP, AVIF).
– Configure quality/compression and Media Library integration via a “Conversion Settings” button (admin-only).
– View server library status (GD/Imagick/WebP/AVIF) with a “How to Enable GD and Imagick” button for setup instructions.
– Modern, clean interface inspired by professional design standards (e.g., TinyJPG-like cards and buttons).
– Secure, efficient, and admin-only (no frontend features).
Access all features on Media > Image Converter, with collapsible settings and instructions.
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/wp-content/plugins/. - Activate the plugin through the Plugins menu in WordPress.
- Navigate to Media > Image Converter to convert images, adjust settings, or view GD/Imagick instructions.
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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Currently supports single-image conversion. Bulk conversion is planned for future updates.
Reviews
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Contributors and 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.
Change Log
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.