196k PNG Full color, lossless
98.8k PNG Full color, lossy (-10 quality)
68.7k PNG Full color, lossy (-20 quality)
49.7k PNG Full color, lossy (-30 quality)
61.2k PNG 256 color, dithered, lossless
70.1k PNG 256 color, dithered, lossy (-10 quality)
66.4k PNG 256 color, dithered, lossy (-30 quality)
119k JPG High quality
28.3k JPG Mid quality
10.5k JPG Low quality
| Re-saving a lossy PNG losslessly results in no further quality loss, and identical filesize. | Re-saving a lossy PNG lossily increases quality degradation, and results in only minor reduction of filesize. |
Lossy (-30) PNG re-saved losslessly, 49.7k  | Lossy (-30) PNG re-saved lossily (-30), 47.8k  |
COMPARISON:
196k PNG Full color, lossless
68.7k PNG Full color, lossy (-20 quality)
119k JPG High quality