Skip to main content
ToolCube – All tools at one place.
Back to all tools

Convert PNG to ICO Online Free

An ICO file is what browsers use for the favicon.ico of a website and what Windows uses for program and folder icons. A single ICO can hold several sizes of the same picture, so the icon looks sharp both in a tiny browser tab and on a large desktop.

Start from a square PNG logo of at least 256 × 256 pixels with a transparent background. Tick the sizes you need: 16, 32, and 48 pixels cover favicons and most Windows uses, and 256 pixels is used for large icons. All of them are packed into one .ico file.

Transparency is kept in every size, and non-square images are centred on a transparent square instead of being stretched.

  • No sign-up or watermark
  • Processed in your browser
  • Batch convert to ZIP

Any format works here, not only PNG. See all formats in the Image Converter.

Loading the Image Converter…

How to Use

How to Convert PNG to ICO

Convert images in five simple steps. No software to install and no account to create.

  1. 1

    Step 1: Upload Your Images

    Drag and drop, tap Browse Files, or take a photo on your phone. Add up to 50 images of any supported format, up to 20 MB each.

  2. 2

    Step 2: Choose the Output Format

    Pick JPG, PNG, WebP, AVIF, GIF, BMP, TIFF, ICO, or PDF in the Convert to menu. Only the options that matter for that format are shown.

  3. 3

    Step 3: Adjust the Options

    Set the quality, a background colour for transparent areas, icon sizes, or PDF page size, and decide whether to remove photo metadata.

  4. 4

    Step 4: Convert

    Press Convert. Each image is converted on your device, one after another, and you see the old and new file size for each one.

  5. 5

    Step 5: Download

    Download files one by one, or all at once as a ZIP. The original file names are kept with the new extension.

Features

Why Choose Our Free Image Converter?

One private tool for every everyday image format, from iPhone photos to website images, icons, and PDFs.

  • 10 Formats

    Open JPG, PNG, WebP, HEIC, AVIF, GIF, BMP, TIFF, and ICO, and save as JPG, PNG, WebP, AVIF, GIF, BMP, TIFF, ICO, or PDF.

  • iPhone HEIC Photos

    Turn HEIC photos from an iPhone or iPad into JPG or PNG that open everywhere, the right way up.

  • Batch Conversion

    Convert up to 50 mixed images at once and download them all as a ZIP. One broken file never stops the rest.

  • Images to PDF

    Combine images into one PDF or make one PDF per image, with A4, Letter, or fit-to-image pages and margins.

  • Transparency Kept

    PNG, WebP, AVIF, GIF, TIFF, and ICO keep see-through areas. JPG and BMP get the background colour you choose.

  • Private by Design

    Images are converted in your browser and never uploaded. Photo metadata such as GPS location can be removed.

  • Quality Control

    Choose the quality for JPG, WebP, and AVIF, and see how much smaller or larger each file becomes.

  • Free, No Watermark

    No sign-up, no watermark, and no limit on how often you convert.

One Converter for Every Image Format

Phones, cameras, websites, and design apps all use different image formats. Instead of a separate tool for every pair, ToolCube converts any supported format to any other in one place: open an iPhone HEIC and save a JPG, turn a logo PNG into an ICO favicon, or shrink a large PNG into a WebP for your website.

Fast and Safe on Your Own Device

The conversion runs in a background process inside your browser, so the page stays responsive even with large photos and long batches. Decoders for formats such as HEIC, AVIF, and TIFF load only when you need them, and nothing is ever sent to a server.

FAQ

Frequently Asked Questions

Answers to common questions about converting PNG to ICO.

Which sizes should a favicon.ico contain?

16 × 16 and 32 × 32 pixels are the essentials for browser tabs and bookmarks, and 48 × 48 is used by Windows. Those three are selected by default.

How do I add the favicon to my website?

Name the file favicon.ico and place it in the root folder of your site. Most browsers find it automatically; you can also link it with a link rel="icon" tag in the page head.

What if my PNG is not square?

The image is scaled to fit and centred on a transparent square, so nothing is stretched or cut off. For the best result, crop it to a square first.

Will the transparent background be kept?

Yes. Every size inside the ICO keeps full transparency, including soft edges.