CleanorTools
Icons

PNG to ICO

Details

How to use PNG to ICO

What the tool does, how to run it, and what to expect from the result.

How to convert a PNG to an ICO file

To convert PNG to ICO, upload one PNG, choose how it should be framed inside the square icon canvas, pick a transparent or solid background, and export. The converter generates a single .ico file containing the standard embedded sizes, all without sending the image to a server.

A square source PNG produces the cleanest icon, but you can use fit framing to keep the whole image visible with padding, or fill framing to crop it edge to edge. Transparency is preserved when the source artwork and chosen background allow it, which keeps favicons crisp against any page color.

  • Upload one PNG image
  • Choose fit or fill framing
  • Pick transparent or solid background
  • Export one multi-size .ico file

What an ICO file is used for

An .ico file is the classic Windows and web icon format, most commonly used as a site favicon (favicon.ico) and for desktop application and shortcut icons. Because a single .ico can embed several resolutions, browsers and the operating system pick the size they need from one file.

This page keeps the job focused on turning one PNG into one ICO, rather than burying it inside a larger favicon bundle generator. That makes it the fast path when all you need is a clean .ico for your site or app.

Tips

Getting a better result out of PNG to ICO

Specific settings and thresholds, not general advice.

  • The exported .ico packs six sizes in one file: 16, 32, 48, 64, 128, and 256. Windows only really asks for three of those in daily use, 16 in window title bars and browser tabs, 32 for shortcuts, and 48 in Explorer's medium view, while 256 is what feeds extra-large icons and thumbnails.
  • Every entry inside the .ico is a PNG, not a BMP. PNG-compressed icon entries are read by Windows Vista and later and by every current browser, which covers everything you will realistically ship to. Genuinely ancient XP-era software that expects BMP entries will not read them.
  • Start from a source PNG that is at least 256 pixels on its long edge. The 256 entry is produced by scaling the source on a canvas, so a 64 pixel logo blown up to 256 comes out soft, and it is the 256 entry that Windows shows at the largest sizes.
  • Fit letterboxes the whole image inside the square and Fill crops it to cover the square. For a non-square wordmark, Fill will cut the ends off. Use Fit, and accept the empty margins, or crop to a square mark before you convert.
  • A 16 pixel icon has 256 pixels of canvas. Detail that reads fine at 256 dissolves at 16. If your mark has thin strokes or lettering, make a simplified square version for the icon rather than shrinking the full logo.
Limits

What PNG to ICO does not do

The honest boundary, so you do not lose time finding it yourself.

  • PNG input only. For SVG, JPG, or WebP sources use the Favicon Converter.
  • The size list is fixed. You cannot choose a subset or add a custom size.
  • It writes PNG-compressed entries only. There is no BMP-encoded entry mode for legacy tooling.
  • One file per run, and there is no padding or safe-area control.
Reference

Terms used on this page

Short, plain-language definitions for the formats and settings above.

Files & formatsFaviconA favicon is the small icon a browser shows next to a site’s name in tabs, bookmarks, and history. It is usually a tiny square image (commonly an ICO, PNG, or SVG) and is one of the smallest files a website serves.General
At a glance

Who PNG to ICO is for

A quick way to understand who this helps, what it solves, and where it connects next.

Best fit

Founders, developers, and designers turning one PNG logo or mark into a Windows-friendly icon file.

Ideal for

Generating one .ico file when a project needs favicon.ico or a classic Windows icon asset.

FAQ

Common questions

Short answers for the questions people usually have before trying a utility like this.

Is this PNG to ICO converter free?

Yes. This is a free PNG to ICO converter that runs in your browser with no signup and no watermark.

Does the ICO contain multiple sizes?

Yes. The export includes the standard embedded icon sizes inside one .ico file for broader compatibility across browsers and Windows.

Can I keep transparency?

Yes. Transparent background is supported when the source artwork and the chosen background allow it, so favicons stay crisp on any color.

Does it upload my image to a server?

No. The conversion runs locally in your browser, so your PNG never leaves your device.

What size PNG should I use?

A square PNG of at least 256 by 256 pixels works best, since the converter can scale it down cleanly to every embedded icon size.

Which sizes does the .ico actually contain?

Six: 16, 32, 48, 64, 128, and 256. All of them are packed into the single file, and whichever consumer opens it picks the entry closest to the size it needs. That is the whole point of the ICO container format.

Can the icon keep a transparent background?

Yes. Every entry is a PNG with an alpha channel, so leaving the background on Transparent gives you a genuinely transparent icon. Choose White, Black, or a custom hex only when you want the mark to sit on a deliberate tile.

Is this the same as a favicon?

It produces the file a favicon.ico needs, yes. Rename the export to favicon.ico, drop it at the root of your site, and browsers will find it even without a <link> tag. If you also want the PNG sizes, the apple-touch-icon, and the Android icons, use the Favicon Converter, which builds the whole bundle.

Why does my icon look blurry at 16 pixels?

Because it is a downscale of your artwork, not a redraw. Real icon sets hand-tune the small sizes: thicker strokes, fewer details, snapped edges. If the 16 pixel entry matters to you, prepare a simplified 16 pixel PNG separately rather than expecting a full logo to survive the shrink.

Is the PNG uploaded?

No. The PNG is drawn onto canvases at each size in your browser, encoded to PNG, and the ICO container is assembled byte by byte locally. Nothing is transmitted.

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