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: The image header, containing width, height, and color depth. IDAT : The actual image data. IEND : Signals the end of the image stream. Performance & Optimization Tips

: For modern web use, it is generally recommended to avoid saving as "interlaced" as it can increase file size unnecessarily. Untitled.png

: Professional software like Adobe Photoshop , GIMP, and specialized tools like pngcrush can significantly reduce file sizes without quality loss. : The image header, containing width, height, and