Filenary

PNG to ICO Converter

Convert PNG image files to Icon file right in your browser — free, private and with no size limit.

Drop your file here

or click to browse

Choose File

This file is processed in your browser and never uploaded to a server.

How to convert PNG to ICO

  1. 1Drop your PNG file into the box above, or click to choose it from your device.
  2. 2Click Convert. The conversion runs locally in your browser — nothing is uploaded.
  3. 3Download your new ICO file as soon as it's ready.

Why convert PNG to ICO?

PNG files can be very large for photos, which slows down websites and uploads. ICO is the standard favicon format and bundles several icon sizes (16px to 256px) in one file.

Why people make this conversion

Favicon uploaders demand .ico with several embedded sizes — this builds it from your PNG artwork.

What is PNG?

PNG is a lossless image format that supports transparent backgrounds, making it ideal for logos, screenshots and graphics with text.

  • MIME type: image/png
  • Standardized: 1996 (ISO/IEC 15948)
  • Compression: lossless Deflate — no detail is ever discarded
  • Supports: 24-bit truecolor plus 8-bit alpha transparency
  • Photos in PNG are usually 5–10× the size of the same JPG

What is ICO?

ICO is the Windows icon format that can hold several sizes in one file. It's the standard format for website favicons.

  • MIME type: image/x-icon
  • Purpose: browser favicons since 1999
  • Layout: several sizes (16×16 to 256×256) inside one file
  • Modern ICO embeds PNG-compressed frames with 32-bit alpha

Frequently asked questions

Is this PNG to ICO converter free?
Yes, it's completely free with no sign-up, no watermark and no daily limits.
Are my PNG files uploaded to a server?
No. The conversion happens entirely inside your browser, so your files never leave your device.
Is there a file size limit?
Filenary sets no limit — even files over 1 GB work. The only practical limit is your device's memory.
Will converting PNG to ICO reduce the quality?
ICO is a lossless format, so no extra detail is thrown away during the conversion — the result looks exactly like the source.
Can I convert several PNG files at once?
This converter handles one file at a time. When it's done, click Start over to convert the next PNG file.
Does it work on iPhone, Android, Mac and Windows?
Yes. It runs in any modern browser — Chrome, Safari, Edge or Firefox — on phones, tablets and computers, with nothing to install.

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Add this tool to your website

Copy the code below and paste it into any page. It's free, needs no sign-up, and files are processed in your visitors' own browsers.