HOW IT WORKS

From source image to responsive image set.

1. Select images

Choose JPEG, PNG, WebP or AVIF still images from your device. Multiple files can be queued at once.

2. Choose outputs

WebP is enabled by default at quality 82. AVIF can be enabled when the current browser exposes AVIF canvas encoding. The original Omega widths are 320, 768 and 1536 pixels.

3. Preserve proportions

Each responsive height is calculated from the source aspect ratio. A requested responsive width is skipped when it is equal to or greater than the source width, so responsive variants are not upscaled.

4. Generate locally

The browser draws the source into an off-screen canvas and encodes the output. No cloud optimization API is required.

5. Download

Download files individually or use the built-in ZIP writer to package the full generated set. AutoWebP also generates an example responsive <picture> snippet for the first processed image.

Duplicate safety

When files of the same byte size are queued, AutoWebP can compare their SHA-256 hashes in the browser and warn when exact duplicate inputs are present. It does not delete source files.