Serve modern format siblings to 98%+ of active modern web browsers.
convert WordPress images to WebP and AVIF
WebP and AVIF for WordPress
Serve smaller modern image formats while preserving stable attachment URLs and original browser fallbacks.
Target Audience
Web developers, SEO practitioners, and administrators targeting core web vitals.
Expected Outcomes
Measure the impact of this workflow.
Preserve stable attachment URLs for social shares and SEO link consistency.
Detect server GD/Imagick format capabilities dynamically to avoid broken assets.
Common problems
What this workflow helps you fix.
Serving legacy formats (JPEG/PNG) increases mobile transfer times and page loads
Server library support varies (GD or Imagick builds may lack AVIF encoding capabilities)
Replacing original URLs breaks cached assets and external hotlink references
Multiple format delivery systems conflict and output invalid nested picture markup
A practical Cyphex workflow
- Check the capabilities matrix on the dashboard to verify active WebP and AVIF support.
- Enable non-destructive sibling generation to keep original JPEGs/PNGs intact.
- Serve optimized formats using picture elements that serve WebP/AVIF with a standard fallback.
- Verify that page builders and cache systems display the sibling assets correctly.
Eligibility matters: local features use WordPress server capabilities. External AI remains optional and follows the provider account you configure.
Frequently asked questions
Why is AVIF listed as unavailable?
AVIF requires specific GD or Imagick library support on your hosting server. If unavailable, Cyphex falls back to WebP sibling creation.
Are original image files deleted?
No. Sibling generation creates extra format versions next to the original files, keeping fallback support active for legacy browsers.
Can formats be regenerated?
Yes. If you adjust compression levels, you can trigger bulk regeneration for modern siblings while keeping original attachments untouched.
Free and open source
Start your webp and avif for wordpress workflow.
Install the free plugin, scan your library, and use only the tools your site supports.