PNG (Portable Network Graphics) is a bitmap format that supports lossless storage and transparency (Alpha channel). It combines the advantages of the GIF format and makes up for its shortcomings, supporting richer colors (up to 48-bit true color) and better compression algorithms. This tool uses browser WebAssembly technology for conversion, ensuring image quality and processing speed.
PNG is most suitable for:
• Icons and logos requiring transparent backgrounds;
• Screenshots and interface design;
• Images containing text;
• Line drawings and geometric shapes;
• Images requiring high-quality storage. Not suitable for: large-sized photos (files will be large), scenarios requiring animation
• Local processing means you can safely convert screenshots containing sensitive information.
• Color depth: Automatically detects the optimal setting
• Preserve transparency: Automatically retained from supported formats
• Compression level: Automatically optimized by the browser
• Remove metadata: Enhances privacy protection
Note: The browser's PNG encoder automatically selects the best compression parameters, usually requiring no manual adjustment.
Handling transparency when converting to PNG:
• Converting from WebP/GIF automatically preserves transparency
• Converting from JPEG cannot create a transparent background
• You can use tools to remove the background first
• Ensure the browser fully supports WebAssembly
• Local processing ensures your designs do not leak
Best supported browsers:
• Chrome/Edge 91+
• Firefox 90+
• Safari 16.4+
• Mobile: It's recommended to use the latest version
Older browsers may: process slower, not support certain formats, have stricter memory limits.
Q: What if PNG files are too large?
A: PNG supports lossless storage, so files are naturally larger. Consider converting to JPEG (if transparency is not needed).
Q: Browser lags when processing many images?
A: It's recommended to process 10-20 images per batch, giving the browser time to free up memory.
Q: How to confirm images are not uploaded?
A: Open the browser's developer tools network panel to see no upload requests.
Q: Maximum supported resolution?
A: Depends on device memory, usually supports up to 8K resolution.