Can I use this tool to generate a favicon.ico for a website?

Yes. The output ICO file contains all standard Windows icon sizes and is suitable for use as a favicon.ico. Most browsers load the appropriate embedded size automatically.

What is the difference between using a PNG and an ICO for Windows icons?

An ICO file is a container that holds multiple sizes simultaneously — Windows selects the right one at runtime. A PNG contains a single resolution and will be scaled by Windows, often producing blurry results at small or very large display sizes.

Does this work for Electron app icons?

Yes. Electron on Windows requires an ICO file for the app window, taskbar, and installer. Upload your source PNG or WebP artwork and download the resulting ICO for use in your Electron build config.

Is there a file size limit for the source images?

Each input image must be 50MB or less. Batch jobs support up to 50 files or 2GB total per job.

Generate Multi-Size ICO Files for Favicons and Desktop Shortcuts

Web projects that ship to Windows users — PWAs, Electron apps, downloadable desktop clients — require ICO files that render cleanly at every size Windows requests. A single PNG used as a .ico breaks in file explorer, the taskbar, and high-DPI contexts. Deliteful converts your web asset into a standards-compliant Windows ICO with all required sizes embedded.

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A Windows ICO file is not a renamed PNG — it is a container format holding multiple image sizes simultaneously. Windows chooses the appropriate size at runtime depending on context: 16px for list views, 32px for standard icon display, 48px for large icon mode, and 256px for modern high-DPI screens and taskbars. Web developers who substitute a single-resolution PNG for an ICO in a Windows installer or .exe manifest end up with blurry or incorrectly scaled icons across at least three of these four display scenarios.

Deliteful accepts PNG, JPG, JPEG, and WebP inputs and produces one ICO per image using high-quality resampling. For web asset workflows that produce multiple icon variants — different sizes or color schemes — batch processing handles up to 50 files per job. The tool runs server-side, so there is no local software to install and the original uploaded files are not modified.

How it works

1
Sign up with Google
Create your free Deliteful account in about 3 clicks — no credit card needed.
2
Upload your web icon assets
Upload PNG, JPG, JPEG, or WebP files up to 50MB each, or batch up to 50 files at once.
3
Download ICO files
Each source image produces one multi-size ICO file ready for use in manifests, installers, or PWA configs.

Frequently asked questions

Can I use this tool to generate a favicon.ico for a website?: Yes. The output ICO file contains all standard Windows icon sizes and is suitable for use as a favicon.ico. Most browsers load the appropriate embedded size automatically.
What is the difference between using a PNG and an ICO for Windows icons?: An ICO file is a container that holds multiple sizes simultaneously — Windows selects the right one at runtime. A PNG contains a single resolution and will be scaled by Windows, often producing blurry results at small or very large display sizes.
Does this work for Electron app icons?: Yes. Electron on Windows requires an ICO file for the app window, taskbar, and installer. Upload your source PNG or WebP artwork and download the resulting ICO for use in your Electron build config.
Is there a file size limit for the source images?: Each input image must be 50MB or less. Batch jobs support up to 50 files or 2GB total per job.

Create your free Deliteful account with Google and convert your web assets to Windows ICO files without installing any software.