ICO to WebP Converter
You have an icon in the old ICO format and a modern web page that would rather use WebP. This converter reads the icon in your browser, keeps its transparent background and writes a WebP file. There is a quality slider if you want to trade detail for size.
How to convert ICO to WEBP
- Add your ICO files by dropping them, clicking the drop zone or pasting.
- The output format is already set to WEBP. Adjust quality or size if you need to.
- Press Convert and compare the original and new size for each file.
- Download each file or all of them as a ZIP.
When to convert, and when not to
- You are putting an icon or small logo on a web page and want a web-native format.
- You need transparency preserved in a compact file.
- You are collecting site assets in a single format.
- Do not use WebP if the file must stay a favicon.ico or open in older desktop software.
What changes
- The browser shows one image from the ICO, usually the largest or default entry, and that is what gets converted. Other embedded sizes may not be reachable.
- WebP output can keep transparency, so the icon is not placed on a coloured background.
- A quality slider controls the lossy compression. Icons with flat colours and hard edges may need a higher setting to stay crisp.
- If your browser cannot encode WebP, the tool says so clearly.
- Metadata is not copied over.
Why not just keep the ICO?
ICO exists for operating systems and browser tabs. Web pages that display an icon inside the content, for example in a feature list or a footer, do not need the container with its several sizes. They need one picture in a format that loads quickly, and WebP is designed for that job.
If you need the tab icon itself, keep the ICO or create a new one from a PNG.
Lossy settings on small pictures
Lossy compression is easiest to spot on tiny graphics with sharp edges and flat colour. A low quality can leave faint smudges around shapes that look perfect in the original. Convert at a high setting first, then lower it step by step while watching the edges.
For small icons the difference in file size between settings is usually modest, so there is rarely a reason to push the slider too far. Check the sizes in the queue and decide for yourself.
Scaling an icon for the page
An icon that is small in the source will look soft when shown large. If your layout needs a larger graphic, start from a bigger version of the logo. The Resize option can scale this picture up, but it cannot invent detail that the icon never had.
For a page that shows a row of small logos or feature icons, WebP keeps the transparency and keeps the download light. Convert each icon at the same quality so the set looks consistent, and view them on the real page background to confirm the edges look clean.
If you need several different sizes of the same icon, convert once and then use the Resize option for the others, or go back to a larger source. Starting from the biggest available picture always gives the cleanest smaller versions.
Privacy: your files stay on your device
- The tool decodes, resizes and encodes your pictures with your browser. The files are never sent to a server.
- To check it yourself: open the browser developer tools (F12), open the Network tab, convert a file, and look for any request that carries your image. You will see none.
Frequently asked questions
Is the transparent background preserved?
Yes. WebP supports transparency, so the see-through areas remain transparent.
Can I choose which size from the ICO to convert?
Not directly. The browser presents one image from the file, usually the largest or default.
Should I use lossy or lossless?
This tool uses the quality slider, which is lossy. Use PNG if you need an exact pixel copy.
Why does the converter report an error?
Your browser may not support encoding WebP, or the icon file may be damaged.
Is the icon sent to a server?
No. It is processed locally.