Image to PNG

PNG (Portable Network Graphics) is a lossless compressed bitmap format that supports transparency (Alpha channel). It combines the advantages of the GIF format and addresses its shortcomings, supporting richer colors (up to 48-bit true color) and better compression algorithms. This tool uses the browser's Canvas API for conversion, ensuring image quality and processing speed.

PNG is best suited for: 1) Icons and logos requiring transparent backgrounds; 2) Screenshots and interface designs; 3) Images containing text; 4) Line drawings and geometric shapes; 5) Images requiring lossless quality. Not suitable for: large-sized photographs (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.

Transparency handling when converting to PNG: 1) Conversion from WebP/GIF automatically preserves transparency; 2) Conversion from JPEG cannot create transparent backgrounds; 3) Online tools can be used to remove backgrounds first; 4) Ensure the browser supports the full Canvas API; 5) Pay attention to the checkerboard pattern representing transparent areas during preview. Local processing ensures your design drafts are not leaked.

Best supported browsers: • Chrome/Edge 88+: Full feature support • Firefox 90+: Full feature support • Safari 14+: Basic feature support • Mobile: Latest version recommended Older browsers may: Process slower, not support certain formats, have stricter memory limits.

Q: What if the PNG file is too large? A: PNG is a lossless format, so files are naturally larger. Consider converting to JPEG (if transparency is not needed). Q: Browser lags when processing many images? A: Recommend processing 10-20 images per batch to give the browser time to free 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, typically supports up to 8K resolution.