OwnFile

Convert ICO to WebP

Free, unlimited ICO to WebP conversion that runs inside your browser. Your files never leave your device. Every conversion runs locally in your browser.

No upload · No sign-up · No file limit

or drop them here

Processed on your device · never uploaded · no limit

This converter needs JavaScript, because the conversion runs on your device rather than on a server.

This extracts the icon from a Windows ICO container and re-encodes it as WebP, preserving the transparent background and producing a smaller file than PNG would. It suits web use, where WebP is universally supported. If the icon is headed for a design tool or desktop application, convert to PNG instead.

How to convert ICO to WebP

  1. Select your ICO files. Click "Choose ICO files" or drag them onto the box above. You can select as many as you like at once.
  2. Wait for the conversion. Each file is converted to WebP on your own device. Nothing is uploaded, so it finishes as fast as your hardware allows.
  3. Download the results. Download files individually, or take them all at once as a single ZIP archive.

ICO vs WebP

  ICO WebP
Full name Windows Icon Web Picture format
Introduced 1985 2010
Compression Uncompressed Lossy or lossless
Transparency Yes Yes
Animation No Yes
Extensions .ico .webp

About ICO files

ICO is a container that holds the same icon at several resolutions — commonly 16, 32, 48, and 256 pixels — so the operating system or browser can pick whichever fits. It is still the format Windows uses for application icons and the one browsers historically expect at /favicon.ico. Converting an ICO to PNG extracts the largest image it contains.

Where they come from: Website favicons and Windows application icons.

Drawbacks of ICO

  • Not a general-purpose image format
  • Poorly supported outside Windows and browsers

Why convert to WebP?

WebP was released by Google in 2010 to cut image weight on the web, and it does: it typically produces files 25–35% smaller than an equivalent-quality JPG. It supports both lossy and lossless modes, full transparency, and animation, making it the one format that covers everything JPG, PNG, and GIF do individually. Its weakness is not technical but social — plenty of desktop software still refuses to open it.

  • Substantially smaller than JPG at matching quality
  • Handles transparency and animation
  • Supported by every current browser

Support: All modern browsers. Poor support outside the browser.

Common questions

Are my files uploaded to a server?

No. The conversion runs entirely inside your browser using your own device’s processor. Your ICO file is never transmitted, never stored, and never seen by us — you can disconnect from the internet after the page loads and it will still work.

Is there a file size or daily limit?

There is no daily limit and no account required. Because your device does the work rather than our server, we have no per-conversion cost to recover. The practical ceiling is your device's available memory — very large files on older phones may fail, in which case convert them in smaller batches.

Can I convert several ICO files at once?

Yes. Select or drop as many ICO files as you like and they are converted one after another, then offered as individual downloads or a single ZIP.

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