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PNG → ICO

Convert PNG to ICO icons.

Turn a PNG into a Windows ICO icon or a website favicon.ico — transparency preserved, converted on a local engine.

Convert nowOr use the universal converter
No signupPrivate — deleted after 1 hourFree to try

What ICO is for

ICO is Windows' native icon format, and it's still what browsers look for at /favicon.ico — the little logo in a browser tab or bookmark. It's also the format for Windows application, shortcut and folder icons. If you have artwork as a PNG, converting to ICO gives you a file those places accept directly.

Start from a clean, square PNG

Icons are square and shown small, so a square source with a simple, high-contrast shape reads best at tab size. Transparency helps too — a PNG with a transparent background becomes an icon that sits cleanly on any tab or desktop colour, and that alpha channel is preserved in the ICO.

Using it as a favicon

Drop the .ico at the root of your site as favicon.ico and most browsers pick it up automatically; you can also point to it explicitly with <link rel="icon" href="/favicon.ico">. Need the other direction, or a PNG for modern rel="icon" tags? Use the SVG to PNG or JPG to PNG tools.

How it works

  1. 01

    Add your PNG

    Drop a PNG (a square image works best for icons). Private by default.

  2. 02

    Convert with a local engine

    PNG becomes ICO with Pillow — no paid API in the loop.

  3. 03

    Download

    Grab your .ico, ready to drop in as a favicon or app icon.

Transparency (PNG alpha) carried through to the ICO

Perfect for favicon.ico and Windows app/shortcut icons

Private uploads, auto-deleted after 1 hour

No watermark, no signup to try

Batch convert many at once, download as a zip

PNG to ICO

Both are raster image formats, so this re-encodes the pixels from PNG into ICO. File size and quality follow the target format's compression — we keep the visible result as close to the original as ICO allows.

Converting a lot of these?

FileWhirl Pro unlocks large files and unlimited batch — or convert them straight from your own code with the FileWhirl API.

See plans

Common questions

Is it free?+

Yes — convert PNG to ICO free, with no signup.

Is my file private?+

Uploads go to a private bucket, are converted, and auto-delete after 1 hour.

What size should my PNG be?+

Use a square PNG so the icon isn't stretched. For a website favicon, 32×32 or 48×48 is plenty; for a crisp desktop icon start from 256×256 and let it scale down.

Does the transparent background survive?+

Yes — ICO supports an alpha channel, so a PNG with a transparent background stays transparent in the icon.

Related conversions

Universal converterJPG to PNGSVG to PNG