Images
Convert ICO to PNG free and local
Transform your ICO files to PNG instantly. ICO is the Windows icon container designed to store favicons and multi-resolution resources. On the other hand, PNG (Portable Network Graphics) is a lossless raster image format that supports transparency and alpha channels with great sharpness. All processing is performed locally, ensuring your file never travels across the internet.
What is ICO?
Standard multi-resolution icon container in Windows and browsers.
- ✓ Stores multiple dimensions in a single file
- ✓ Mandatory for legacy compatibility favicons
- ✗ Only useful for icons
- ✗ Not suitable for general or photographic images
Why convert to PNG?
Image with lossless compression and alpha channel transparency.
- ✓ No loss of quality
- ✓ Supports transparency
- ✓ Ideal for screenshots, logos and web graphics
- ✗ Large file sizes for real photographs
- ✗ Does not support multiple pages or high-compression animation
Other popular Image conversions
Local-First Philosophy
Your files stay at home. By pure architecture.
I designed Nua Convert with a very simple golden rule: the best way to protect your files is to never have them. That's why all processing is executed 100% in your browser using modern JavaScript, Canvas, and WebAssembly APIs.
The server only sends you the web page to load. Once you're inside, you can disconnect from the internet if you feel like it: the workspace will continue to function perfectly locally. No tricks, no catches, no strings attached.
Web vs Desktop
Use web for fast tasks. Download the App for heavy duty.
The browser is great for quick, daily tasks like optimizing a PNG, formatting code in a pinch, or compiling a fast PDF. But if you need to convert gigabytes of video, transcode entire folders of music, or compress giant files, the Nua Convert desktop app takes full advantage of every core of your processor, without the memory limits imposed by Chrome or Firefox tabs.
Nua Convert Web
Your lightweight image optimizer in the browser
- Compression and format change of ICO to PNG
- Pixel resizing and instant rotation
- EXIF metadata removal for extra privacy
- Batch processing of thousands of images at once
- Preservation of local subdirectory structure
- Native usage offline without loading tabs
Nua Convert Desktop
Full local power of your computer
- Fast native batch conversion of thousands of images in one click
- Batch optimization for websites and portfolios in seconds
- Preserves filenames and local directory hierarchy
- No memory limits or browser tab crashes
- Direct integration with the system's file explorer