By removing this "junk," you convert a 500KB PNG into a 480KB PNG that loads 4% faster. That is better .
zopflipng --lossless_8bit --iterations=25 step2.png final_better.png png to png better
| Goal | Recommended Method | |------|--------------------| | Web delivery | pngquant (lossy) + oxipng | | Archival master | Keep original + generate optimized copy | | Printing | 16‑bit, no compression, embed ICC profile | | Transparent logos | Reduce colors to 256 + alpha (indexed PNG) | By removing this "junk," you convert a 500KB
| Parameter | Worse PNG | Better PNG | |-----------|-----------|-------------| | Bit depth | 8-bit (256 colors) | 16-bit (for gradients/smooth images) | | Color type | Indexed (palette) | Truecolor + alpha if needed | | Interlacing | None (for web) | Adam7 (for progressive loading) | | Gamma chunk | Missing | gAMA chunk for consistent display | By removing this "junk
Use PNG-8 when color palette allows; use PNG-24 when color fidelity and smooth gradients matter.
