ICO Converter

Convert PNG images to the ICO format used by Windows and web browsers. Choose which sizes to bundle — 16, 32, 48, 64 or 256 pixels — and download a standards-compliant .ico file containing them all, built entirely in your browser.

Conversion happens locally in your browser. Your image is never uploaded.

How to use ICO Converter

  1. Drop a PNG image into the box — square images work best.
  2. Tick the sizes you want included (16, 32, 48, 64, 256 px).
  3. Press “Convert to ICO”.
  4. Download the .ico file and use it for your website or app.

About this tool

The ICO format is a small container that can hold several versions of the same image at different sizes, so Windows Explorer, browsers and installers can each pick the resolution they need.

Modern ICO files store each size as a PNG inside the container, which keeps files small and quality high. This tool builds that container for you with the sizes you select, center-cropping your image so every size stays sharp.

Frequently asked questions

Why does my ICO contain several sizes?
Different places display icons at different sizes: browser tabs use 16 px, desktop shortcuts use 32–48 px, and high-resolution displays use 256 px. Bundling several sizes in one file lets each context pick the sharpest version.
Do I need a square image?
Square images look best. If yours is rectangular, the converter center-crops it so the icon is not stretched or squashed.
Which sizes should I include for a website?
16 and 32 px cover browser tabs and bookmarks. Adding 48 and 256 px future-proofs it for high-resolution screens and desktop shortcuts.
Can I convert JPG or WebP?
Use the Image Converter first to turn any supported image into a PNG, then bring the PNG here. Transparency is preserved because ICO stores PNG data.
Will the ICO work in Windows?
Yes. PNG-based ICO files are supported by Windows Vista and newer, which covers virtually every PC in use today.

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How to use Ico Converter

Upload your image to the Ico Converter canvas by dragging or clicking. Configure settings such as quality, dimensions, or filter options as needed, then start processing. The output renders in the same tab and can be saved directly.

Practical benefits

Frequently asked questions

Is this tool free to use?
Yes. Ico Converter is fully free with no account or subscription required.
Does it upload my files?
No. All processing occurs locally within your browser session.
Can I use this for professional projects?
Yes, the tool is designed for both casual and professional use. Always verify critical outputs.