How do I convert ICO to WebP?

Add your ICO file to the upload area above, then press Convert. The WebP file downloads straight to your device. You do not need an account, and there is no watermark.

Are my files uploaded to a server?

No. This conversion runs entirely inside your browser using WebAssembly, so the file never leaves your device — you can even disconnect from the internet after the page loads and it will still work.

Does converting to WebP reduce quality?

WebP uses lossy compression, so some data is discarded. At the default quality the difference is very hard to see or hear; raise the quality setting if you need to be certain, at the cost of a larger file.

How large a file can I convert?

Up to 120 MB per file for this conversion. Because the work happens in your browser, the practical limit is your device's memory — larger files work on a desktop with plenty of RAM and may fail on an older phone.

Can I convert several files at once?

Yes. Add as many as you like and press Convert All. Each file is processed independently, so one failure does not stop the rest, and you can download everything together as a ZIP.

Can I use this on my phone?

Yes. FileTools360 works in mobile browsers on iOS and Android, including choosing files straight from your camera roll. Very large videos may run out of memory on a phone — those are better converted on a laptop.

ImageAdjustable qualityRuns in your browser

ICO to WebP Converter

Turn ICO files into WebP in a couple of clicks. Multi-resolution icon container for favicons and apps. Modern web format, ~30% smaller than JPG at similar quality. The output is re-encoded, so quality depends on the settings you choose.

On your deviceNever uploadedGone when you close the tabHow this works

Drop your files here

ICO files (.ico) · up to 120 MB each

or paste files from your clipboard

Ready when you are

Drop a ICO file above and FileTools360 will turn it into WebP — right here on your device, without uploading anything.

⌘K to search converters

How to use it

1
Add your ICO files
Drag them onto the upload area, choose them from your device, or paste them from your clipboard. You can queue several at once.
2
Adjust the settings if you want to
The defaults suit most people. Open Advanced to control quality, dimensions, rotation and metadata removal.
3
Convert and download
Press Convert. Everything happens on your own device — nothing is uploaded. Download files one by one, or grab them all as a ZIP.

ICO and WebP explained

ICO is a container that holds several versions of the same icon at different sizes, so the operating system or browser can pick the one that fits. It is capped at 256×256 pixels.

WebP is a Google-developed format that offers both lossy and lossless modes, transparency, and animation in one container. In its lossy mode it typically produces files around 25–35% smaller than JPEG at comparable visual quality.

Where ICO files come from: Website favicons and Windows application icons.
Where WebP is used: Modern websites, and increasingly the default export from web-focused design tools.

ICO vs WebP

The two formats solve different problems, which is why converting between them involves trade-offs rather than a straight upgrade.

ICO compared with WebP
Property	Source	Target
Compression	Lossy or lossless	Lossy or lossless
Transparency	Yes	Yes
Animation	No	Yes
Introduced	1985	2010
Browser support	Browsers and Windows. Sizes are capped at 256×256.	All modern browsers. Some older desktop apps can't open it.

ICO is stronger at: Holds multiple resolutions in one file. The format browsers expect for favicon.ico. Supports transparency.
WebP is stronger at: Substantially smaller than JPEG at similar quality. Supports transparency, which JPEG cannot. Supports animation, replacing GIF at a fraction of the size.

Why convert ICO to WebP?

People make this switch when they run into the limits of ICO: anything else. WebP is the better fit when you are publishing images on a website and want smaller files without a visible quality drop.

ICO limitations that prompt the switch: Capped at 256×256. Not a general-purpose image format. Awkward to edit.
What you give up: Desktop applications and older software often cannot open it. Some photo printing services and older phones reject it.

Does converting ICO to WebP reduce quality?

Both formats store the content without discarding data, so this conversion preserves it exactly. The file size may change because the two formats compress differently, but the content itself is unaffected.

WebP is not always smaller. For simple graphics with few colours, a well-optimised PNG can still win.