PNG ICO

PNG to ICO Converter

Convert PNG to ICO in your browser. Free, private, and fast. No uploads — the conversion runs entirely on your device.

Drag & drop your PNG file here

or

Max file size: 50 MB · Your file stays in your browser

Your file is processed locally in your browser — nothing is ever uploaded.

Why Convert PNG to ICO?

Every website needs a favicon.ico. Converting PNG to ICO produces a proper Windows icon file — the image is scaled to standard favicon size and wrapped in the ICO container browsers and Windows expect.

Common use cases

  • You have a PNG file and need it in ICO format for website favicons served as /favicon.ico.
  • The target software or platform requires ICO but your file is in PNG.
  • You want to reduce file size or improve compatibility without using desktop software.
Keep in mind: ICO is only meant for small icons — images are capped at 256×256 pixels, so it is unsuitable as a general-purpose image format.

How to Convert PNG to ICO

  1. Upload or drop your PNG file into the converter above.
  2. Adjust any output settings for ICO if needed.
  3. Click Convert and download your converted file instantly.

About the Formats

PNG (Portable Network Graphics)

PNG uses lossless compression, preserving every pixel of the original without any quality degradation. It supports full alpha-channel transparency, making it ideal for logos, icons, UI elements, and any image that requires a transparent background or pixel-perfect fidelity.

Compatibility: Universal — supported by all browsers, operating systems, and image editors.

ICO (Windows Icon Format)

ICO is the icon container format used by Windows and by every website favicon. A single ICO file can hold multiple image sizes (16×16 up to 256×256) so the operating system or browser can pick the sharpest variant for the context.

Compatibility: Universal favicon support in every browser. Windows native. Most image editors need a plugin to save ICO.

100% Private & Browser-Based

Your files never leave your device. All conversion happens locally in your browser — nothing is uploaded to any server. No sign-up required.

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Need the reverse?

ICO to PNG Converter

FAQ

Frequently Asked Questions

Yes — completely free with no sign-up, no watermarks, and no size limits for typical files.

Quality depends on the output settings. For lossless output, choose the highest quality setting available.

Your file is processed entirely within your browser using local JavaScript. It is never uploaded to any server. Only you can access your file.

For browser-based conversion, files up to 50 MB work best. Very large files may take longer depending on your device. We recommend splitting very large files before converting.

Currently, AintoB converts one file at a time to keep the browser-based process simple and private. Reload the page to convert another file.