Batch PNG to ICO Converter
Convert PNG to ICO online for free. 100% secure, fast, and private local file conversion directly in your browser. No software installation required.
Why convert PNG to ICO?
ICO is the container Windows and browsers use for icons, and it needs multiple sizes in one file — 16, 32, and 48 pixels and up. PNG, by contrast, is a single-resolution raster. Converting PNG to ICO packages your artwork into the multi-size container that favicons, desktop shortcuts, and Windows application icons require, complete with transparency. Web developers and app publishers convert their PNG logos into ICO so the same graphic shows crisply at every icon size.
WasmConvert converts PNG to ICO in your browser, generating the standard multi-size ICO that keeps your icon sharp from a 16px browser tab to a 48px desktop shortcut. Transparency from the PNG is preserved, which matters because icons sit on unpredictable backgrounds. Everything is processed locally, so unreleased app icons stay confidential, and batch mode converts an entire icon set at once with no upload limits — ideal when a product ships with dozens of icons.
Common use cases
- Turning a PNG logo into a favicon that displays correctly in browser tabs and bookmarks.
- Packaging app and software icons into the ICO format Windows shortcuts expect.
- Converting a PNG icon set into multi-size ICOs for desktop applications.
How to convert PNG to ICO (Step-by-step)
Select or drop your file
Click "Choose Files" or drag and drop your PNG file directly onto this page.
Set target format
Make sure the output format is set to ICO.
Local conversion
Click convert. Your file is processed entirely in your browser memory - no data is uploaded to our servers.
Save instantly
Once finished, your ICO file is ready to download.
PNG is a lossless raster image format that supports transparent backgrounds. It is the format of choice for icons, logos, and web graphics where detail and clarity are more important than file size.
ICO is an image file format for computer icons. It is widely used for website favicons and Windows applications.
Pro tips for PNG to ICO conversion
- Start from a square PNG at 256px or larger; the converter downsamples to the ICO's standard sizes, and upscaling from a tiny source looks blurry.
- Design the icon with generous padding — 16px versions shrink fast, and fine details become noise at tab size.
- Favicons are tiny; avoid gradients and thin strokes that will not survive downsampling to 16px.