Comparison of lossless PNG compression tools

Pic 1% improvementPic 2% improvementPic 3% improvementPic 4% improvementPic 5% improvement
Original 20,304
22,953
9,703
96,828
2,492
PNGOut 8,619
57.55%
18,680
18.62%
7,998
17.57%
96,698
0.13%
1,108
55.54%
ZopfliPNG 8,463
58.32%
18,738
18.36%
8,019
17.36%
91,846
5.15%
1,118
55.14%
AdvanceCOMP 8,931
56.01%
19,121
16.69%
8,701
10.33%
92,219
4.76%
1,124
54.90%
OptiPNG 9,979
50.85%
20,671
9.94%
9,703
0.00%
93,658
3.27%
1,201
51.81%
PunyPNG 9,979
50.85%
20,671
9.94%
9,703
0.00%
93,717
3.21%
1,204
51.69%
SmushIt 14,207
30.03%
22,953
0.00%
9,698
0.05%
93,619
3.31%
1,615
35.19%
PNGCrush 14,207
30.03%
20,671
9.94%
9,703
0.00%
93,658
3.27%
1,652
33.71%
PNG Recompressor 14,268
29.73%
24,339
-6.04%
9,664
0.40%
95,161
1.72%
1,617
35.11%
RIOT 20,424
-0.59%
20,643
10.06%
10,404
-7.22%
101,904
-5.24%
1,818
27.05%