PNG to ICO Converter
Turn a PNG into a multi-resolution .ico favicon containing every size browsers and Windows ask for.
Complete the security check to begin
About Converting PNG to ICO
A favicon is not one image. A browser tab wants roughly 16 pixels, a bookmark bar wants 32, a pinned Windows tile wants 256, and a high-DPI display wants double whatever it asks for. The .ico format exists precisely to solve this: it is a container that holds several complete bitmaps at different resolutions inside a single file, and the operating system picks whichever one fits the slot it is filling.
This converter builds that multi-resolution icon for you. Give it a square PNG of at least 256 by 256 pixels and the resulting .ico contains seven separate bitmaps — 16, 24, 32, 48, 64, 128 and 256 pixels square — each downscaled with high-quality Lanczos resampling rather than crude pixel dropping. Smaller sources produce the subset of sizes that actually fit, so a 64 pixel PNG yields the 16, 24, 32, 48 and 64 pixel entries.
Common use cases
- Creating the favicon.ico that browsers request from the root of every website
- Producing an application icon for a Windows executable or installer
- Setting a custom icon on a Windows shortcut, folder or drive
- Generating an icon for a desktop tool built with Electron, .NET or Qt
- Replacing a blurry favicon that was made by renaming a single small PNG
Tips for best results
- Start from a square image of 256 by 256 or larger to get the complete set of seven sizes. That single file then covers everything from a browser tab to a pinned Windows tile.
- Non-square input stays non-square: a 300 by 120 banner produces entries like 16 by 6 pixels, which will look wrong in an icon slot. Crop to a square before converting.
- Transparency is preserved, so a logo on a transparent background keeps its shape instead of sitting inside a visible rectangle.
- Anything larger than 256 pixels is scaled down to 256, which is the largest size the ICO format supports.
- Fine detail disappears at 16 pixels no matter how good the source is. Icons that read well at tab size are simple, high-contrast shapes rather than detailed illustrations.
How to Convert PNG to ICO Online
Turning a PNG file into ICO is straightforward here — upload, convert, download. What you gain with ICO: holds multiple resolutions in one file.
Drag and drop your file into the upload area, click to browse your device, or paste a URL to a file hosted online. You can upload files up to 250 MB and batch convert up to 20 files at once.
Once uploaded, the conversion from PNG to ICO starts automatically. The process runs entirely in an isolated environment - your data never leaves the secure pipeline.
Your converted file is ready instantly. Click the download button to save it to your device. The file is deleted from memory immediately after download.
What makes this PNG-to-ICO converter different
Privacy here is not a checkbox. Every PNG-to-ICO conversion is engineered so your data never lingers, leaks or gets reused.
Convert instantly with no sign-up, no email and no profiling cookies. We never build a profile around you or the files you convert.
Runs in any modern browser on Windows, macOS, Linux, Android and iOS — no install, plugin or desktop software needed.
Each job runs in an isolated in-memory sandbox, so most conversions finish in seconds instead of waiting in a queue.
We never keep a copy. Once your ICO is delivered, both the original and the result are gone — there is nothing left to leak or misuse.
PNG vs ICO - Format Comparison
| Feature | PNG | ICO |
|---|---|---|
| File extension | .png | .ico |
| Supported by PrivConvert | Yes (as input) | Yes (as output) |
| Privacy-safe conversion | In-memory, zero storage | |
| Max file size | 250 MB per file | |
| Batch support | Up to 20 files simultaneously | |
Trusted by thousands of users
Professionals reach for PrivConvert when the image they are converting is sensitive and cannot be left sitting on someone else’s server.