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WebP converter

Convert modern WebP images to universal PNG or JPEG formats, or compress PNG, JPG, and GIF pictures into lightweight WebP files right in your browser. Powered by HTML5 Canvas and createImageBitmap, your images are decoded and re-encoded locally on your machine with custom quality settings. Batch convert multiple files and download them individually or as a single ZIP archive. Files never leave your device.

Files never leave your device · Canvas & createImageBitmap · Zero server uploads

85%

Choose image files or drag & drop here

Supports WebP, PNG, JPG/JPEG, and GIF. Batch conversion supported.

WebP converter example

Converting high-res PNG banner to WebP

A 2.4 MB product banner in PNG format converts to a crisp WebP at 85% quality, reducing file weight to ~650 KB (73% savings) without visible compression artifacts.

WebP converter how-to

  1. Stay on this page. WebP converter runs in the tab.
  2. Enter or drop your input here. The file or text is not posted to a server.
  3. Copy or download the result when it appears.

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WebP converter FAQ

What is a WebP converter?
A WebP converter changes images to and from WebP. WebP is an image format that usually produces a smaller file than JPEG or PNG at similar visual quality. This one converts PNG, JPG and GIF to WebP, and WebP to PNG or JPG, locally in your browser. Nothing is uploaded.
Do my images get uploaded to a server for conversion?
No. All decoding and re-encoding are executed directly on your computer using your browser's HTML5 Canvas and createImageBitmap APIs. Your images are never sent over the internet.
Which formats can I convert to and from WebP?
You can convert PNG, JPEG/JPG, and GIF images to WebP. You can also convert WebP files into universal PNG (lossless) or JPEG (with adjustable compression quality).
How does the quality slider affect WebP and JPEG?
The quality slider controls lossy compression from 10% (maximum file reduction) to 100% (highest fidelity). For PNG output, conversion is always lossless and the quality slider is not applied.
Can I convert multiple images at once?
Yes. You can select or drop multiple images into the converter. Each file will be converted locally, and you can download them individually or package them into a single ZIP archive.
What happens to image transparency when converting to JPEG?
Because the JPEG format does not support alpha transparency channels, transparent areas are automatically rendered with a clean white background.
Why should I convert images to WebP?
WebP generally provides 25% to 35% smaller file sizes compared to JPEG and PNG at equivalent visual quality, improving page load speeds and reducing bandwidth.
How can I convert images to WebP programmatically without this page?
In modern browsers, load the image into an HTMLImageElement or ImageBitmap, draw it to an HTMLCanvasElement with canvas.getContext('2d').drawImage(), then call canvas.toBlob(blob => ..., 'image/webp', quality). Alternatively, use the libwebp cwebp CLI tool: cwebp -q 85 input.png -o output.webp.