PNG to ICO
Upload a PNG file and download it as ICO. Free to start.
- Sent over HTTPS · link expires in 24 h
How it works
- Step 1:
Drop the PNG file on the orange block above, or press “Choose PNG”.
- Step 2:
Press “Convert to ICO”. The block shows the progress while the server converts the file.
- Step 3:
Press “Download” to save the ICO file. On Free the link works for 24 hours.
How PNG to ICO conversion works
PNG is an image format: it uses lossless DEFLATE compression and supports a full alpha-transparency channel, preserving every pixel exactly as encoded. ICO is an image format that bundles multiple raster images at different resolutions (16x16 through 256x256) into a single file for use as application icons. This conversion changes the file's encoding, compression method, and supported feature set. Colour profiles and orientation metadata are preserved in the output. Converting between these two formats is common when the source application does not support ICO natively or when the target platform only accepts ICO. 1converter processes this conversion server-side using open-source tools. Files are transferred over HTTPS, converted on secure cloud servers, and returned through a private download link that expires after 24 hours on Free.
Sources and specifications
Quality levels for PNG → ICO
| Level | File size | Speed |
|---|---|---|
| Low qualitySmallest file, basic quality | Very small | Very fast |
| Medium qualityRecommendedBalanced size and quality | Medium | Fast |
| High qualityLarger file, great quality | Large | Moderate |
| Maximum qualityLargest file, best possible quality | Very large | Slow |
Image Tip: For photos, Medium quality offers the best balance. For graphics with text or sharp edges, use High or Maximum quality to preserve clarity.
When to convert
What the ICO file is good for and why people convert to it.
- Preserves PNG alpha transparency when generating ICO icons
- Packs multiple icon resolutions into one .ico file for crisp UI scaling
- Create a Windows shortcut/app icon from a transparent PNG logo
- Generate multiple favicon/icon sizes inside one ICO for web deployments
Where your file goes
- It travels to our server over an encrypted HTTPS connection and is converted there.
- The ICO file comes back as a private link. It stops working after 24 hours on Free and 7 days on paid plans, and then the files are deleted.
- Want the file to stay on your device? Private Mode converts images right in the browser. Open Private Mode