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PNG to ICO All Sizes

Convert PNG to ICO with all standard sizes — 16, 32, 48, 64, 128, 256, 512, and 1024px — packed into one file. Free, unlimited, no watermark, no signup. Choose exactly which sizes you need. Runs entirely in your browser.

🔒 Files never leave your browser
⚡ Fast — converts in seconds
🎨 8 sizes in one ICO file
♾️ Unlimited conversions

PNG → ICO All Sizes

Free · No watermark · No signup · Choose your sizes

Select ICO sizes to include  / 

Drop PNG files here

or click to browse — PNG only · batch · unlimited

Preview

Sizes generated

How to Use

Choose your sizesTick which sizes to include — or keep all 8 selected
Upload your PNGDrag & drop or click to browse — no signup, no limits
Click ConvertGenerates all selected sizes instantly in your browser
Download your ICONo watermark. One file with all sizes. Ready to use.

Why Use This Tool

  • Choose your sizesInclude only the sizes you need — full control
  • Unlimited conversionsNo daily cap, no file limit, no subscription
  • No watermark, everYour ICO is 100% clean — no branding added
  • No signup neededNo account, no email, no tracking
  • Fast & easyUpload, click Convert, download. Done in seconds.
  • 100% privateFiles processed locally — never leave your device

ICO Size Guide

  • 16 & 32pxBrowser favicons and taskbar icons
  • 48 & 64pxWindows Explorer icons and high-DPI taskbar
  • 128 & 256pxInstaller dialogs and extra-large icon view
  • 512 & 1024pxWindows 11, 4K displays, macOS compatibility

PNG to ICO Converter — All Sizes in One File

This free PNG to ICO converter is the only tool you need to create a complete, professional ICO file. Unlike converters that output only a single size, this tool generates all 8 standard ICO sizes — from 16×16 to 1024×1024 pixels — packed into a single .ico file. Windows, macOS compatibility layers, and all major browsers automatically select the most appropriate size for each display context.

You also have full size control: use the checkboxes to include only the sizes your project needs. Building just a favicon? Select 16, 32, and 48. Need a full Windows application icon? Select all sizes. The converter is flexible, unlimited, free, and requires no signup.

🎯 Pro tip: For the sharpest results at all sizes, start with a PNG that is at least 1024×1024 pixels and square. Simple, bold designs with high contrast downscale better than complex images with fine details or small text.

All Standard ICO Sizes — When to Use Each

Standard ICO sizes, their context, and recommended use cases
SizePrimary UseContextRecommended For
16×16Browser faviconBrowser tabs, bookmarksAll ICO files
32×32Standard desktop iconDesktop shortcuts, ExplorerAll ICO files
48×48Large icon viewWindows Explorer list viewApp icons, favicons
64×64High-DPI taskbar150% DPI scaled displaysApp icons
128×128Installer dialogSoftware setup wizardsApp icons, installers
256×256Extra-large iconsWindows "Extra Large" viewApp icons, Windows
512×512Windows 11 & 4KHigh-DPI modern displaysModern app icons
1024×1024Ultra-HiDPI & macOSMaximum quality sourceFull ICO packages

What Makes a Good ICO File?

A good ICO file has three qualities: it contains multiple sizes so Windows and browsers always have a sharp version to display, it preserves transparency so the icon composites correctly over any background, and it uses a clean simple design that remains recognisable at 16×16 pixels. This converter handles the first two automatically — the design quality depends on your source PNG.

✅ For favicons: a multi-size ICO with 16, 32, and 48px is sufficient for all browsers. For Windows application icons, include all sizes up to 512px minimum. For future-proofing and macOS compatibility, include 1024px.

Frequently Asked Questions

A complete ICO file should contain 8 standard sizes: 16×16 (browser favicon and taskbar), 32×32 (standard desktop icon), 48×48 (Windows Explorer large icons), 64×64 (high-DPI taskbar), 128×128 (software installer dialogs), 256×256 (Windows extra-large icons view), 512×512 (Windows 11 and 4K displays), and 1024×1024 (ultra-high-DPI and macOS compatibility). This tool generates all eight sizes automatically from a single PNG source in one click.
Upload your PNG to this free converter, make sure all size checkboxes are selected, click Convert, and download a single ICO file containing all 8 standard sizes from 16×16 to 1024×1024 pixels. No signup, no watermark, no software to install. Everything runs in your browser and your files never leave your device.
Yes. This tool lets you select exactly which sizes to include using the checkboxes above the upload zone. You can include all 8 standard sizes (16, 32, 48, 64, 128, 256, 512, 1024px) or tick only the sizes you need. Use the "All" and "None" buttons to quickly select or clear all sizes. At least one size must be selected before converting.
PNG is a single-image format ideal for web graphics that supports transparency. ICO is a container format used for Windows icons and favicons that stores multiple image sizes in one file — Windows and browsers automatically pick the most appropriate size. You cannot use a PNG file directly as a Windows application icon; it must be converted to ICO. For favicons, modern browsers accept both PNG and ICO, but ICO ensures maximum compatibility including older browsers.
Yes. Modern 32-bit ICO files fully support per-pixel alpha channel transparency, exactly like PNG. When this tool converts your PNG to ICO, the alpha channel is preserved in all generated sizes. Transparent areas in your source PNG will remain transparent in every size entry of the output ICO file. This is essential for icons that need to display correctly over any background colour.
Convert your PNG to ICO using this free tool, rename the output to favicon.ico, and upload it to the root directory of your website so it is accessible at https://yoursite.com/favicon.ico. Then add this line inside your HTML <head> section: <link rel="icon" type="image/x-icon" href="/favicon.ico">. A multi-size ICO file ensures your favicon is sharp in all browsers, on all devices, at all display densities.
Blurry small icons are caused by automatic downscaling of a complex source image. When a 512px or 1024px image is reduced to 16px, fine details, thin lines, gradients, and small text all become illegible. The solution is a clean, simple, high-contrast design that remains readable at 16×16 pixels. Bold shapes, strong outlines, and minimal detail produce the sharpest small icons. Avoid thin strokes below 3–4px in your original design.
The ICO format specification allows image entries up to 65535×65535 pixels, but real-world use tops out at 1024×1024 pixels. Windows 11 and modern app packaging tools recognise the 1024px size. For website favicons, browsers typically use sizes up to 256×256, but including all sizes in the ICO file ensures forward compatibility with future display technologies and operating system updates.
Yes. This tool supports unlimited batch conversion with no restrictions. Drop or select multiple PNG files at once and they are all converted to separate ICO files in one click, each containing all your selected sizes. No file count limits, no queue, no watermarks on any output file, and no signup required.
Yes. This converter runs entirely in your web browser using HTML5 Canvas, so it works on any operating system — Windows, macOS, Linux, iOS, and Android. No software installation required. Open the page in any modern browser, upload your PNG, and download your ICO file. The output ICO files are fully compatible with Windows on all platforms.
Yes. Your PNG files are never uploaded to any server — all conversion happens locally in your browser using JavaScript and the HTML5 Canvas API. Your image data stays on your own device and is never transmitted anywhere. There is no account to create, no email required, and no data stored about you or your files.
For best results, use a source PNG that is at least 1024×1024 pixels and square (equal width and height). A large source gives the converter the most pixel data when downscaling to smaller sizes like 16×16 and 32×32. If your PNG is smaller than a selected target size, the converter will upscale it, which may produce a slightly soft result at that size. Always start with the largest possible source image.

Who Needs a PNG to ICO Converter with All Sizes?

Web Developers Setting Up Favicons

A multi-size favicon.ico is still the most reliable way to ensure your favicon displays correctly across all browsers, including older versions of Internet Explorer and Edge. Including all sizes from 16px to 256px in your ICO file gives every browser the size it needs without upscaling. This free converter produces a complete favicon.ico in seconds — no signup, no watermark, no limits.

Windows Application Developers

Desktop applications built with any Windows framework require a fully specified multi-size ICO file. Visual Studio, Qt Creator, Electron, and NSIS installers all read ICO files and select the appropriate size for each context. A single ICO file containing all sizes from 16px to 512px (or 1024px for ultra-HiDPI support) covers every Windows display scenario from legacy XP to modern Windows 11 on 4K monitors.

Graphic Designers Delivering Icon Packages

Clients requesting icon assets often need an ICO file alongside SVG, PNG, and ICNS formats. This free batch converter lets designers convert entire sets of PNG icons to multi-size ICO files in one session — unlimited files, no watermark, no account needed. The size selector also lets you tailor the ICO output to the client's exact requirements.

System Administrators Customising Windows

Custom folder icons, application shortcuts, and Windows shell customisation all rely on ICO files. IT professionals who prepare large batches of icon files for corporate environments benefit from the unlimited batch conversion — convert dozens of PNG brand assets to ICO files at once, with all necessary sizes included in each output file.