Convert PNG to ICO Online

Instantly convert transparent PNG files into proper Windows ICO or website favicon files.

HEIC to JPG WebP to JPG WebP to PNG PSD to PNG AVIF to JPG AVIF to PNG PNG to ICO JFIF to JPG JFIF to PNG PDF to JPG JPG to PDF PDF to PNG PNG to PDF Nano Banana Watermark Remover

Choose files or drag & drop

Maximum privacy - No uploads - Instant conversion

PhotoQuill: a free Photoshop alternative — edit, resize and layer images right in your browser.

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Why Convert PNG to ICO?

Website Favicons

While modern browsers support PNG favicons, the legacy .ico format remains the standard for ensuring maximum compatibility across all browsers, especially older versions of Internet Explorer, guaranteeing your site looks professional everywhere.

Windows Software Icons

If you are developing a Windows desktop application or just want to customize your desktop folders, the Windows operating system strictly requires the .ico format for application and shortcut icons.

How to Convert PNG to ICO

1

Upload PNG

Select a square, transparent PNG image (ideally 256x256 or 512x512) and drop it into the converter.

2

Format Conversion

PhotoQuill processes the image locally, embedding the pixel data and transparency into a valid ICO container format.

3

Save Icon

Download the standard .ico file, instantly ready to be used as a favicon.ico or a Windows application icon.

Frequently Asked Questions

Does ICO support transparent backgrounds?
Yes! The ICO format supports 32-bit color, which includes a full alpha channel. As long as your source PNG has a transparent background, the resulting ICO file will preserve that transparency perfectly.
What resolution should my PNG be?
For best results, upload a perfectly square PNG. A resolution of 256x256 pixels is considered the modern standard for Windows icons and high-resolution favicons, though smaller sizes like 64x64 or 32x32 will also work.
Are my design files uploaded to a server?
No. PhotoQuill is a client-side application. The entire process of reading the PNG and encoding it into an ICO format happens directly in your browser, ensuring your proprietary designs remain private.