What sizes does the ICO file contain?

Each ICO output contains six embedded PNG frames: 16×16, 32×32, 48×48, 64×64, 128×128, and 256×256 pixels. Modern Windows and browsers select the best size automatically.

Why convert PNG to ICO?

ICO is the standard format for Windows application icons and browser favicons. If you have a logo or graphic saved as PNG that you want to use as an icon, converting to ICO is the right step.

Can I convert multiple PNG files at once?

Yes — this tool supports batch conversion. Drop up to 25+ files at once, monitor per-file status, then download individually or as a single ZIP archive.

Does my data get uploaded to a server?

Never. All PNG decoding and ICO encoding happens entirely in your browser using JavaScript. Your images never leave your device.

What software opens ICO files?

ICO files open natively in Windows Explorer (as icons), web browsers (as favicons), GIMP, Photoshop (with a plugin), and most professional image editors.

PNG to ICO Converter

Convert PNG images to ICO icon files locally in your browser. Each ICO contains six sizes (16–256 px) embedded as PNG frames. Batch convert, preview thumbnails, download individually or as a ZIP. No uploads, no account required.

🖼️

Drop PNG files here

or Browse Files · Multiple files supported

Download as ZIP ZIP named with timestamp · Individual download always available per file

What This Tool Does

Converts PNG images — logos, graphics, icons, and illustrations — to ICO format entirely in your browser. Each ICO output contains six embedded PNG frames at standard icon sizes (16×16, 32×32, 48×48, 64×64, 128×128, and 256×256 pixels). No server upload, no account, no file size limits imposed by a backend. Since PNG is natively supported by all modern browsers, conversion is instant with no external libraries required.

Who This Is For

Web developers who need a favicon from a PNG logo or graphic
Windows app developers who need an ICO file for application icons
Designers converting PNG brand marks into multi-size icon assets
Anyone who needs a quick ICO from a PNG file without installing software

Example: Input: logo.png (brand logo) → Output: logo.ico (multi-size icon, ready for favicon or Windows app use)

💡 Need to keep transparency? PNG is already lossless — the ICO will preserve your alpha channel. To convert in the other direction, try ICO to PNG. For web-optimized output, use Image to WebP.

Related Guides & Tutorials

Guide

PNG to ICO: Complete Conversion Guide

What ICO format is, when to use it for favicons and Windows icons, and how to get the best results from PNG source images.

Tutorial

How to Convert PNG to ICO: Step-by-Step

A hands-on walkthrough for converting PNG images to ICO in your browser — batch mode, multi-size output, ZIP download, and more.

Guide

PNG to GIF Conversion Guide

When and why to convert PNG to GIF for web animations and legacy compatibility.

Tool

⬇ Image Resizer

How It Works

Drop your PNG filesDrag multiple .png files onto the drop zone, or click Browse Files. Thumbnails generate immediately using the browser's native image decoder.

Click Convert to ICOThe browser draws each PNG to a Canvas element; the ICO encoder scales to six sizes and builds a standards-compliant ICO blob in memory — no external library needed.

Download your ICOsDownload files individually or check "Download as ZIP" for a single timestamped archive. App resets after export.

🔒 Privacy & Security

All decoding and encoding runs entirely in your browser. PNG files are never sent to any server — they stay in your browser's memory from load to download. This is especially important for logos, brand assets, and confidential design files.

You Might Also Need

PNG to GIF → PNG to TIFF → PNG to WebP → ICO to PNG → Image Resizer → Image to WebP →

PNG vs ICO: Format Comparison

Property	PNG	ICO
Primary use	Web graphics, logos, screenshots	Application icons, favicons
Typical dimensions	Any size	16×16 to 256×256 px
Multi-size support	No — one size per file	Yes — multiple frames in one file
Transparency (alpha)	Full 32-bit RGBA	Full 32-bit RGBA transparency
Platform support	Universal	Windows, all browsers (favicon)
Best for	Web images, design work	App icons, favicons, Windows UI
Internal format	Lossless compressed PNG	PNG or BMP frames embedded

Frequently Asked Questions

What sizes does the output ICO contain?▼

Each ICO file contains six PNG frames: 16×16, 32×32, 48×48, 64×64, 128×128, and 256×256 pixels. Windows and browsers automatically select the most appropriate size for the context.

Can I use the ICO as a favicon?▼

Yes — ICO is the original favicon format. Rename the output to favicon.ico and place it in your website root. All browsers will use it automatically, selecting the most appropriate embedded size.

Can I convert multiple files at once?▼

Yes — drop up to 25 or more files at once. The tool processes them sequentially, shows per-file status badges, and lets you download all ICOs individually or as a single timestamped ZIP.

Does the ICO support transparency?▼

Yes — the ICO frames are encoded as 32-bit RGBA PNG, which supports full alpha channel transparency. If your source PNG has transparent areas, they will be preserved in every ICO frame.

Is this tool free with no limits?▼

Yes — completely free with no file size limits, no per-conversion limits, and no account required. Processing happens in your browser so we never see your files.

What is the ZIP file named?▼

The ZIP is named dataconversioncenter_png_to_ico_YYYYMMDDHHMM.zip using your local time — for example dataconversioncenter_png_to_ico_202603081400.zip.