ICO is a file format. Use PNG.to to convert ICO files to and from various other formats.

How do I convert ICO files?

Select the conversion you need from this page, upload your file, click convert, and download your converted file instantly.

ICO コンバータ

変換する ICO to and from various formats

Convert your ICO files quickly and easily with our free online converter.

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About ICO

ICO (アイコン) は、Windows アプリケーションにアイコンを保存するために Microsoft によって開発された一般的な画像ファイル形式です。複数の解像度と色深度をサポートしているため、アイコンやファビコンなどの小さなグラフィックに最適です。 ICO ファイルは、コンピュータインターフェイス上のグラフィック要素を表すために一般的に使用されます。

Common Uses

Sharing and distributing ICO files
Converting between different formats
Professional and personal use

ICO 変換に関するよくある質問

What is a ICO file?

is a lossless image format that supports transparency (alpha channel). It's ideal for graphics, logos, screenshots, and images that need crisp edges without compression artifacts. ICO is supported by all web browsers and image editing software.

How do I convert ICO images?

Converting images is simple: 1) Choose your desired output format from the options above, 2) Upload your image by dragging and dropping or clicking to browse, 3) Wait for the conversion to complete, 4) Download your converted image. Our converter preserves quality throughout the process.

Is ICO conversion free?

Yes, our converter is completely free for basic use. No registration required. Premium users get additional benefits like batch conversions, larger file sizes, and priority processing.

Does ICO support transparency?

Yes, PNG supports full alpha channel transparency, allowing for semi-transparent pixels. This makes it perfect for logos, icons, and graphics that need to be placed on different colored backgrounds.

Will converting ICO reduce quality?

PNG is a lossless format, so converting to PNG preserves full quality. Converting to lossy formats like JPG may reduce quality slightly, but we use optimized settings for the best results.

What is the maximum file size?

Free users can convert images up to 100MB. Premium subscribers enjoy unlimited file sizes - perfect for high-resolution images.

Can I convert multiple images at once?

Yes! Premium users can batch convert multiple images at once. Upload multiple files and convert them all simultaneously - perfect for converting entire photo collections.

Are my uploaded files secure and private?

Absolutely. All files are uploaded over encrypted HTTPS connections, processed on secure servers, and automatically deleted after conversion. We never view, share, or store your content. Your privacy is our priority.

When should I use PNG vs JPG?

Use PNG for graphics, logos, screenshots, and images with text or transparency. Use JPG for photographs and images where file size matters more than perfect quality.

Do I need to install software?

No software installation required. Our converter works entirely in your web browser. It's compatible with Windows, Mac, Linux, iOS, and Android. Just upload, convert, and download.