A versatile tool that allows re-encoding PNG files. B. Desktop Tools (Batch Processing & Advanced Control)

There are several practical reasons to process an existing PNG file: What are PNG files and how do you open them? - Adobe

TinyPNG or Convertio Warning: Never upload sensitive images (passports, IDs, confidential documents) to free online converters.

Sometimes, a PNG file becomes corrupted or is saved with a non-standard color space that causes errors in certain web browsers, game engines, or applications. Forcing a PNG-to-PNG conversion rewires the file structure into a standard, universally compliant format, effectively "healing" the broken file. Color Quantization (PNG-24 to PNG-8)