Convert images to WebP

WebP files are usually much lighter than JPG and PNG while looking the same, so your pages load faster. Convert a whole batch in one go.

Sealed on this device

Runs in your browser. Nothing is uploaded.

Sealed

Your images

Convert to

How it works

  1. Add your images

    Drop JPG, PNG, HEIC, AVIF, GIF or BMP files, or a mix of them. Add as many as your site needs.

  2. Tune the quality

    The default quality suits most websites. Tick Lossless for logos and graphics that must stay pixel-perfect.

  3. Download for your site

    See how much each file shrank, then download the WebP images one by one or together in a zip file.

Frequently asked questions

Why use WebP on a website?

WebP files are typically a quarter to a third smaller than JPG at similar quality, and much smaller than PNG for graphics with transparency. Lighter images load faster and help your page speed scores.

Do all browsers support WebP?

Yes, all current versions of Chrome, Edge, Firefox and Safari display WebP. Some desktop apps and older email clients may not, so keep a JPG copy if you send images by email.

Is transparency kept?

Yes. WebP supports transparency, so PNG logos and cut-out images keep their see-through areas.

Lossy or lossless WebP?

Lossy (the default) gives the smallest files and is right for photos. Lossless keeps every pixel exactly, which suits logos, icons and screenshots with text.

Are my images uploaded?

No. The WebP files are created in your browser with libwebp compiled to WebAssembly. Your images never leave your device.

Install One For All on your computer

One For All then opens in its own window, like an app, straight from your desktop or home screen. Nothing to download from a store, and your files still stay on your device.

  1. Click the install icon at the right of the address bar, or open the browser menu (⋮).
  2. Choose “Install One For All” or “Install page as app”: a shortcut is added to your desktop and your apps.

Download this tool’s engine?

This tool works entirely in your browser. To do that, it needs to download the items below from One For All, just once. They are then kept on this device, so next time the tool starts right away.

Your files are never sent anywhere.