Free, no account, no watermark. Your ICO files are turned into WebP inside this browser tab — they are never uploaded to a server.
Nothing leaves your device
No account, no email
Free, and no watermark
Drop your files here
Tap to pick your photos
or
Choose files
Up to 30 files at a time · 60 MB per file
Higher quality means a larger file.
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Why convert ICO to WebP?
A practical way to reuse an icon on a web page. WebP keeps the transparency that JPG would flatten, weighs less than the equivalent PNG, and every current browser renders it. If the .ico holds several sizes, you get the largest one. Note that this is not how you make a favicon — browsers still want a real .ico or a PNG for that.
WebP is the pragmatic choice for anything served on the web: meaningfully lighter pages and faster loads, without the support gaps AVIF still carries.
How to convert ICO to WebP
Drop your ICO files into the box above, or click to pick them from your device.
Adjust the quality slider if you want a smaller file or a sharper result.
Hit convert. The work happens inside your browser, so it takes a second or two per image.
Download each WebP file, or grab them all in one ZIP.
About the formats
ICO — Windows Icon
ICO is a container for icons rather than a general image format. A single .ico can hold the same icon at several sizes so Windows can pick whichever one it needs, and modern files often just wrap PNG data inside. Browsers still accept it for favicons, but nothing else treats it as a normal picture.
Strengths
Holds several sizes in one file, so icons stay crisp at any scale
The historical standard for Windows icons and website favicons
Modern files can carry PNG data with full transparency
Limitations
Not a general-purpose image format, and never was
Most image editors cannot open or export it
Size limits make it useless for photographs
WebP
WebP is Google's attempt to replace both JPEG and PNG with a single format. It handles lossy and lossless, keeps transparency and animation, and typically comes in 25–35% smaller than an equivalent JPEG. Every browser released in the past several years supports it, which is why so much of the web now serves it.
Strengths
25–35% smaller than JPEG at matched quality
Transparency and animation in one format
Supported by every current browser
Limitations
Desktop software from before 2020 often cannot open it
Print shops and photo labs frequently reject it
Its lossy mode smooths fine texture more aggressively than JPEG
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Frequently asked questions
Are my photos uploaded anywhere?
No. The conversion runs entirely in your browser using WebAssembly and the Canvas API. Your images are never sent over the network, never touch a server, and are dropped from memory as soon as you close the tab.
Will I lose quality?
WebP is a lossy format, so some data is discarded. At the default quality of 85% the difference is invisible on screen for most photos. Raise the slider if you plan to print or edit the result.
Is there a limit or a cost?
It is free and there is no account. The only limits are practical: 30 files at a time and 60 MB per file, so that the tab does not run out of memory on a phone.
Can I convert several files at once?
Yes — drop in up to 30 files and they are processed one after another, then downloaded individually or as a single ZIP.
Does it work offline?
Once the page has loaded, yes. The converter itself needs no network connection, so you can drop the connection and keep converting.
Does it work on a phone?
Yes, on iOS and Android. Large batches are slower on a phone because the decoding happens on the device, so stick to smaller groups if things feel sluggish.