Format & Conversion

WebP to AVIF

Convert WebP images to AVIF. WebP is built for the web, where it usually lands 25-35% smaller than an equivalent JPEG; AVIF for the web, where it generally beats both JPEG and WebP on size at matched quality. Both formats are lossy, so this is a re-encode and a little detail goes each time. Start from the best source you have rather than chaining conversions. Runs on your own Vistalyth Tools instance. Files never reach a third party.

Deploy with DockerView Source

Features

  • Quality control over the AVIF encode, so you choose the size-versus-detail point
  • Batch conversion across a folder of WebP files
  • Metadata and colour profile carried over wherever AVIF can hold them
  • Your WebP files are processed on your own server and never uploaded anywhere

What you can do

  • Cut page weight by serving AVIF instead of WebP
  • Batch a folder of WebP files into AVIF in one pass
  • Satisfy an upload form or pipeline that takes AVIF and rejects WebP

Self-hosted. Your files never leave your network.

Vistalyth Tools runs entirely on your own infrastructure. Files processed with WebP to AVIF are never uploaded to third-party servers. Deploy a single Docker container and process files with full privacy, no watermarks, and no usage limits. Open source under AGPL-3.0.

Frequently asked questions

Will converting WebP to AVIF lose quality?
Convert once from the best original you have. Chaining conversions is what visibly degrades an image, not any single hop.
Which quality setting should I use?
Start at the default, then lower it until you can see the difference at the size the image is actually viewed. Most photographs hold up further down than people expect.
Can I go back to WebP afterwards?
You can convert back, but you will not recover the original. WebP discarded detail when it was first written, and AVIF cannot invent it. Keep the source file if you might need it.

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