WordPress image optimization
KG Smart Image Converter
Local WebP & AVIF conversion for WordPress — your images stay on your server.
Private by design
Your images stay on your server.
KG Smart Image Converter processes images locally on the WordPress server. It does not require an external image conversion API and keeps the original JPEG and PNG files intact.
Proven in production
Already working on a real, image-heavy WordPress site.
KG Smart Image Converter is already handling a large coloring-page library in a live WordPress environment, with more than 30,000 coloring-page images processed.
kolorowanki.net.plFeatures
Built around WordPress workflows.
Multiple encoders
GD, Imagick and optional locally installed cwebp or avifenc.
Background conversion
Process existing Media Library images in manageable background jobs.
Originals untouched
Modern formats are created as separate files with JPEG/PNG kept as fallback.
Media Library integration
Conversion status and manual actions fit into the normal WordPress media workflow.
Diagnostics & cleanup
Inspect server capabilities and clean generated files when needed.
WP‑CLI
Run status, conversion, cleanup and diagnostic actions from the command line.
How it works
Four simple steps.
Add images
Upload new JPEG/PNG images or work with the existing Media Library.
Convert locally
The plugin creates WebP and/or AVIF files using an available local encoder.
Serve modern formats
Supported browsers can receive a modern format with the original file as fallback.
Keep control
Review status, diagnostics and generated files from WordPress or WP‑CLI.
Local processing
No image conversion API required.
Keep image processing within your own WordPress environment when your server provides a supported encoder.
Not required
Not required
Preserved
GD · Imagick · cwebp · avifenc
Inside the plugin
A clear workflow from conversion to diagnostics.
Real KG Smart Image Converter screens translated to English for the product website.
FAQ
Common questions.
Does KG Smart Image Converter modify original files?
No. WebP and AVIF versions are stored separately and the original JPEG or PNG remains available.
Do I need an API key?
No. Image conversion is performed locally using supported server-side encoders.
Which encoders can it use?
Depending on server configuration: PHP GD, Imagick, cwebp and avifenc.
Can it process existing Media Library images?
Yes. Existing JPEG and PNG media can be queued for background conversion.
Does it support WP‑CLI?
Yes. The plugin includes commands for status, conversion, diagnostics and cleanup workflows.
Built for WordPress. Processed locally.
Download the current free release directly from this site. No external conversion service is required.