PNG to ICO Converter
PNG to ICO Converter creates one bounded PNG-in-ICO entry locally from a square PNG without uploading it.
Purpose and limits
What this tool does
Resize a square PNG to one selected icon size and wrap it in a standards-compatible ICO container.
- Input
- One square local PNG up to 20 MiB, 4,096 px per side and 16.7 MP.
- Result
- One local ICO containing a PNG entry at the selected size from 16 through 256 pixels.
How to use it
- Choose a square local PNG and select the desired icon size.
- Review the PNG-in-ICO compatibility and privacy notes.
- Process locally and download the generated icon.ico.
Limitations
- The source must be a structurally valid square PNG; malformed chunks, CRCs and oversized images are rejected.
- The ICO contains one modern PNG payload rather than a legacy BMP entry.
- Output is normalized through an sRGB canvas; physical mobile-device support is not claimed.