ImgSquash

WebP to ICO Converter

WebP compresses well, but some older apps, printers and CMSs still reject it. Converting to Windows ICO icons gives you the icon format browsers look for at /favicon.ico and Windows uses for shortcuts. Support outside the browser is the problem. Older Photoshop versions, many print workflows, plenty of CMS uploaders and a long tail of desktop software either refuse WebP or handle it badly — which is exactly why people convert it back to something older. Website favicons and Windows shortcut icons — a square source with clear shapes that still read at 16 pixels. Drop your files below and the work happens on your own machine: the conversion runs in the browser through the Canvas API, so nothing is uploaded, there is no file-size cap, no watermark and no sign-up. Batches are fine — drop a folder's worth and take them back as a single ZIP.

Drop images here

or click to browse — JPG, PNG, WebP, HEIC, AVIF, GIF, BMP, SVG

Private: files never leave your device

What a WebP file actually is

WebP is Google's 2010 format, derived from the VP8 video codec. It offers both lossy and lossless modes and, unusually, supports transparency in both — the reason it can replace JPG and PNG with one format. Google's own comparisons put it roughly 25–35% smaller than JPEG at matched quality.

Files usually arrive as WebP because they were saved from a website: browsers and CDNs serve it widely, so 'save image as' on a modern site frequently produces a .webp you then cannot open in the application you needed it for.

What you get from ICO

ICO is a container that holds one or more small square images, with transparency, for use as an icon. It caps out at 256×256 — anything larger has to be scaled down, and the format is not intended for general pictures.

Every browser requests /favicon.ico by default, with no HTML required, and Windows uses ICO for application and shortcut icons. It is a narrow format that is completely reliable inside its niche.

What changes when you convert WebP to ICO

An icon is being built here, not a picture converted. The WebP is decoded, scaled to fit within 256×256 and stored losslessly inside the ICO container — so whatever compression artifacts the original carried are preserved faithfully, then shrunk to the point where nobody will ever see them. Detail is lost to the scaling, which is the intended outcome.

Transparency survives intact. Both WebP and ICO carry a full 8-bit alpha channel, so cut-outs, drop shadows and anti-aliased edges convert without a white box appearing behind them, and the result still composites cleanly onto any background colour.

ICO cannot exceed 256×256, so anything larger is scaled down to fit while keeping its aspect ratio. Work from a square source if you can — a wide image gets letterboxed into the square, and fine detail disappears entirely at the 16-pixel size a browser tab actually renders.

WebP as an icon source is almost always a file that came off a website, so check what you have before committing: it may already be a downscaled thumbnail rather than the original artwork, and upscaling it into an icon will look soft at every size. If the WebP was saved in lossless mode — likely for a logo or screenshot — the pixels are pristine and it makes an excellent source. If it was lossy, look for the design file before settling.

Frequently asked questions

Is this WebP to ICO converter really free and private?

Yes. Conversion happens entirely in your browser using the Canvas API — your WebP images are never uploaded to a server, there is no file limit, no watermark and no sign-up.

Can I convert multiple WebP files at once?

Yes — drop any number of files and they convert in one batch. Use "Download all" to save the results as a single ZIP.

What size will my ICO file be?

ICO cannot store an image larger than 256×256, so anything bigger is scaled down to fit while keeping its aspect ratio. For a browser favicon a square source works best — 256×256 covers every modern use, and browsers scale it down to the 16 or 32 pixel tab icon themselves.

How do I use this as my website favicon?

Save the file as favicon.ico in your site's root directory. Browsers request /favicon.ico automatically, so no HTML is strictly needed — though adding <link rel="icon" href="/favicon.ico"> makes it explicit.

Does converting WebP to ICO lose quality?

An icon is being built here, not a picture converted. The WebP is decoded, scaled to fit within 256×256 and stored losslessly inside the ICO container — so whatever compression artifacts the original carried are preserved faithfully, then shrunk to the point where nobody will ever see them. Detail is lost to the scaling, which is the intended outcome.

Should the icon be square?

Yes. ICO holds square images, so a wide or tall source is fitted into the square and ends up with empty space around it. Start from a square design with generous margins — the tab icon renders at 16 pixels, where anything intricate turns to mush.

Why did a site give me a WebP I cannot open?

Because browsers and CDNs serve WebP widely for the bandwidth saving, so 'save image as' hands you the format the site was optimised in rather than a universal one. Converting is the standard fix; nothing about the image itself is unusual.

Related conversions

JPG → ICOPNG → ICOWebP → JPGWebP → PNGHEIC → ICOAVIF → ICO

Advertisement