CalcBrew

Image Converters

PNG to ICO

Upload a square logo and get a proper multi-size favicon.ico for your website, or a Windows icon for a shortcut or app.

Runs in your browser — files never leave your device.

Drop PNG, JPG, SVG, WebP file here

or click to browse · paste from clipboard · up to 100 MB

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Why convert PNG to ICO

A favicon.ico that contains 16, 32 and 48 px versions looks sharp in browser tabs, bookmarks and Windows shortcuts alike; a single 512 px PNG scaled down by the browser looks blurry at 16 px.

Each size is resized with high-quality resampling and stored as PNG data inside the ICO container, which every modern browser and Windows version reads. Non-square images are centred on a transparent square first.

How it works

  1. Drop your files onto the box above, click it to browse, or paste from the clipboard.
  2. Adjust the options if you need to — the defaults suit most cases.
  3. Press Convert. The work happens on your device, so speed depends on your computer or phone.
  4. Download the ICO.

About the formats

PNG · Portable Network Graphics · .png

Lossless image format with transparency, ideal for screenshots, logos, icons and graphics with sharp edges or text.

  • PNG is lossless: every pixel is preserved, which is why photos saved as PNG are 5–10× larger than JPG.
  • Supports an 8-bit alpha channel, so edges can be partially transparent.
  • Most browsers and apps have supported PNG since the late 1990s.

JPG · JPEG image · .jpg

The universal photo format: small files, supported by every device, camera and website, but no transparency and slight quality loss on each save.

  • JPEG compression discards fine detail the eye rarely notices; quality 80–90 is usually indistinguishable from the original at a fraction of the size.
  • Re-saving a JPG repeatedly adds generation loss, so keep an original and export copies.
  • JPG has no alpha channel — transparent areas become white or black when converted from PNG.

SVG · Scalable Vector Graphics · .svg

A vector format described in XML: logos and icons that scale to any size without blur, editable in a text editor.

  • SVG has no fixed pixel size; when you convert it to PNG you choose the output dimensions.
  • SVG files can contain scripts and external references, which is why some platforms reject uploaded SVGs.
  • Browsers render SVG natively; most social networks and office apps still need a PNG.

WebP · WebP image · .webp

Google’s web image format: 25–35 % smaller than JPG at the same quality, supports transparency and animation, but not every desktop app can open it.

  • WebP has both lossy and lossless modes, and both support transparency.
  • All modern browsers support WebP; older image editors, Windows Photos before 2020 and many print workflows do not.
  • Right-clicking and saving an image from a website often gives you a WebP file even if the page shows a JPG.

Related conversions

More in Image Converters · All converters

Frequently asked questions