Refract performs on-the-fly image transforms, optimization, and global edge delivery — driven entirely by URL parameters. Point it at your existing image origin; originals are fetched on demand and cached at the edge, never stored permanently. The panel below runs the seven browser-honest parameters live; fm, q, and dpr are negotiated at the edge and travel in the URL only.
Rendered width of the result plate.
Fig 1. The source at left; the live result at right, rebuilt from the URL above as each parameter changes. The 62% payload figure in the status bar is a labeled average, not a measurement of this preview.
Ten chainable URL parameters — w h fit fm q dpr crop rot blur bg. Smart crop keeps subjects in frame.
fm=auto negotiates AVIF → WebP → JPEG from the request's Accept header. 62% average payload reduction vs. source JPEG.
41 edge locations. Cached response p50 21 ms, cache hit ratio 98.6%, cold transform p50 89 ms / p99 340 ms.
Point Refract at your image origin and request your first transform. No re-upload — originals are fetched on demand and cached at the edge, never stored permanently.
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