JPG to WebP Converter

WebP is Google's format built on the VP8 video codec. Prediction-based block coding plus optional lossless mode, which in practice compresses about 25 to 35% better than a JPEG of comparable visual quality. This tool decodes each JPG, paints it to a canvas and re-encodes it as WebP with your quality value, from 0.1 to 1, defaulting to 0.8.

Batch operation covers up to 20 files at 10MB each, with optional per-file resizing during conversion and a combined ZIP download built with JSZip. All of it runs in your browser, so the images never leave the device and there is no upload queue to wait behind.

Built-in extras. A Rotate output control, 90, 180 or 270 degrees clockwise applied on the canvas before encoding, a one-tap Grayscale conversion and a Filename prefix added to every download and to the ZIP.

At equal visual quality a WebP is usually the smaller file, and at equal file size it is usually the cleaner one. Less blocking on edges and less colour bleed around text. That is why it is the default recommendation for photo-heavy pages.

Two caveats. WebP encoding from canvas is a browser feature, and older Safari builds and some in-app browsers never implemented it, so test on the browser you actually use. And conversion is generation loss. Your JPEG is decoded and re-compressed, so do this once from the best source rather than repeatedly re-saving.

WebP is a delivery format, not an editing one. Layers, 16-bit depth and most professional workflows still belong in PNG or a native editor file, and anything with transparency should come from PNG to WebP instead, which carries alpha through.

If your audience includes very old browsers, keep a JPEG fallback in the markup, and remember that a WebP converted from an already-poor JPEG inherits every artefact in the source.

For a product page. Crop in Image Cropper, resize to the real display width in Image Resizer, convert here at 80%, and serve with a source element that lists WebP first and JPEG second so old browsers still get a working image.

For social posts where the platform re-compresses anyway, convert at a slightly higher 90% so the platform has better pixels to work with, then check the posted result before you batch the rest.