ICO to WebP

Free ICO to WebP converter - convert in your browser, no upload, no sign-up.

100% free. Runs entirely in your browser - your files and data never leave your device and nothing is uploaded to any server.

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Drop ICO files here or click to upload

Supports multiple files

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About this tool

Convert ICO images to WebP straight in your browser. ICO is the Windows icon container, which holds several small sizes of the same image in one file, and ICO is built for icons, so most editors and web platforms will not accept one - which is usually why you are here. Files usually come out noticeably smaller, because WebP compresses much harder than ICO. WebP is Google's web format, which keeps transparency while compressing far better than PNG, and webP is a lossy format, so a small amount of detail is discarded. At the quality this tool uses that is invisible on a photograph, but fine text and sharp edges - screenshots especially - can soften slightly. Transparency survives the conversion intact, so cut-out logos and icons stay cut out. Everything happens locally. Your ICO files never leave the device, so there is no file-size limit and no waiting for a server to get to you.

How to use this tool

  1. Add your ICO filesClick the box or drag ICO images onto it. Nothing is uploaded - your browser reads the files directly.
  2. Let it convertEach image is decoded and re-encoded as WebP on your device. A large batch takes a moment; nothing is queued on a server.
  3. Download your WebP imagesSave them one at a time, or take the whole batch as a single ZIP.

Key features

  • Works offline once the page has loaded.
  • Converts ICO to WebP without uploading anything.
  • Batch conversion - drop a whole folder and convert it in one pass.
  • No sign-up, no watermark and no file-count limit.
  • Shows the before and after size of every file, so you can see what the conversion cost or saved.

Common uses

  • Opening a ICO in software that only accepts WebP.
  • Getting ICO images into a document, presentation or email that refuses to embed them.
  • Converting a batch of ICO files handed over by a client or a colleague.
  • Preparing ICO images for a platform that rejects the format on upload.
  • Shrinking site images before publishing, without paying for an image CDN.

Tips for better results

  • Batch the whole folder in one pass - converting one file at a time is the slow way to do this.
  • An ICO can hold several sizes at once. The browser picks the largest, so that is the one you get.
  • Convert from the highest-quality ICO you have, not one that has already been resized or re-saved.
  • Confirm your platform accepts WebP before publishing - most modern websites do, most print shops and older desktop apps do not.

Mistakes to avoid

  • Expecting WebP to repair a low-quality ICO. Conversion changes the container, never the pixels already inside it.
  • Renaming the file extension by hand instead of converting. That changes the name, not the data, and the file simply fails to open.

Supported formats

  • ICO
  • WebP

Frequently asked questions

Drop your ICO files onto the box above and download the WebP results. It all happens on your device - no upload, no account, no queue.

WebP is a lossy format, so a small amount of detail is discarded. At the quality this tool uses that is invisible on a photograph, but fine text and sharp edges - screenshots especially - can soften slightly.

Transparency survives the conversion intact, so cut-out logos and icons stay cut out.

Yes. Add as many as you like and they are processed together, then download them one by one or as a single ZIP.

Files usually come out noticeably smaller, because WebP compresses much harder than ICO.

Yes, completely - no sign-up, no watermark and no limit on how many files you convert. The work runs in your browser, so it costs nothing to provide.

No. The conversion uses your own device's image engine, so your ICO files never leave your computer. That also means it works with confidential material and on a slow connection.

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