Which MIME types does smoxy support for optimization & caching?
smoxy supports caching and optimization for a selected set of MIME types. The exact behavior depends on which features are enabled in your smoxy configuration.
Caching Support
Always cacheable
- text/html
- image/jpeg, image/jpg, image/png, image/webp, image/gif, image/svg+xml
HTML is cached when the zone's Dynamic cache is enabled, which allows faster delivery of dynamic or frequently requested pages. Images are cached as part of Optimization.
Cacheable on request
Every other content type is off by default and enabled per zone under Cacheable content types on the Cache page, grouped into five classes:
| Class | Content types |
|---|---|
| Stylesheets | text/css |
| JavaScript | application/javascript, text/javascript |
| JSON | application/json, application/ld+json, application/manifest+json |
| XML and plain text | application/xml, RSS and Atom feeds, text/plain, CSV, Markdown |
| Fonts | woff, woff2, ttf, otf, eot |
Two limits apply to every content type: responses larger than 10 MB are never stored, and video and audio are not cacheable at all, because players request byte ranges rather than whole files.
Optimization Support
- image/jpeg
- image/jpg
- image/png
- image/webp
When Optimization is active, these file types are processed and optimized by smoxy. The optimized versions are then cached automatically, ensuring fast delivery and reduced bandwidth usage.
Automatic Conversion to Modern Formats
When enabling WebP or AVIF in the Optimization settings:
- smoxy automatically converts supported images to WebP or AVIF formats.
- The optimized images are served from the smoxy cache.
- smoxy respects the Accept headers of the client request, ensuring compatibility with all browsers and devices.