Transcode images

Transcode an image from Workers AI before uploading to R2

Last updated Apr 21, 2026

const stream = await env.AI.run("@cf/bytedance/stable-diffusion-xl-lightning", {
    prompt: YOUR_PROMPT_HERE,
});

// Convert to AVIF
const image = (
    await env.IMAGES.input(stream).output({ format: "image/avif" })
).response();

const fileName = "image.avif";

// Upload to R2
await env.R2.put(fileName, image.body);

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description: Draw a watermark from KV on an image from R2 title: Watermarks image: https://developers.cloudflare.com/images/examples/watermark-from-kv/og.png?v=5d5ec62a8e3805a5

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