image optimizer for web

WebP benchmark web lossless optimization

last updated: 19/06/2026

this test shows how optimizers use automatic lossless reductions for web usage by using the default or the same command — point is to highlight heuristics and transforms. evaluations are done on specific image test sets

• PNG — all are 8 bits/sample — or 1, 2, 4, 8 bits/pixels for paletted, critical chunks only
• MAC — Intel(R) Core(TM) i5-12400 (6C, 12T), 2.50 GHz — 16,0 Go DDR4 RAM — WD Black SN750 1 To — Windows 11 Pro
• NTE — this document would be generated automatically without any human verification
• BIN — preferably 64-bit — identified as release

• speed would be measured with maximum tools capabilities (including mt/mp), reflecting what end user should expect
• you can sort results by clicking on the column headers (time (s), saved (KB)) — javascript would be required

all sets — 1 354 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	17.63	90193.92
pingo	1.00	-s1 -l	20.78	90787.84
pingo	1.00	-s2 -l	28.53	91241.64
pingo	1.00	-s3 -l	31.90	91709.44
pingo	1.00	-s4 -l	33.96	91760.64
pingo	1.27.2	-s0 -l	16.21	90296.32
pingo	1.27.2	-s1 -l	20.98	91043.84
pingo	1.27.2	-s2 -l	28.17	91811.84
pingo	1.27.2	-s3 -l	32.52	92129.28
pingo	1.27.2	-s4 -l	35.22	92231.68

alpha — 118 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.77	4210.30
pingo	1.00	-s1 -l	0.94	4205.15
pingo	1.00	-s2 -l	1.21	4235.05
pingo	1.00	-s3 -l	1.28	4238.74
pingo	1.00	-s4 -l	1.25	4238.74
pingo	1.27.2	-s0 -l	0.64	4206.38
pingo	1.27.2	-s1 -l	0.97	4208.84
pingo	1.27.2	-s2 -l	1.27	4239.97
pingo	1.27.2	-s3 -l	1.19	4241.43
pingo	1.27.2	-s4 -l	1.24	4241.43

bitdepth-4 — 6 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.34	170.10
pingo	1.00	-s1 -l	0.36	170.10
pingo	1.00	-s2 -l	0.54	172.56
pingo	1.00	-s3 -l	0.65	175.25
pingo	1.00	-s4 -l	0.70	175.25
pingo	1.27.2	-s0 -l	0.32	171.33
pingo	1.27.2	-s1 -l	0.37	171.33
pingo	1.27.2	-s2 -l	0.55	173.79
pingo	1.27.2	-s3 -l	0.72	177.71
pingo	1.27.2	-s4 -l	0.75	177.71

bitdepth-8 — 10 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.69	242.66
pingo	1.00	-s1 -l	0.73	250.50
pingo	1.00	-s2 -l	1.16	251.73
pingo	1.00	-s3 -l	1.20	256.88
pingo	1.00	-s4 -l	1.31	256.88
pingo	1.27.2	-s0 -l	0.71	242.66
pingo	1.27.2	-s1 -l	0.78	250.50
pingo	1.27.2	-s2 -l	1.06	251.73
pingo	1.27.2	-s3 -l	1.22	257.11
pingo	1.27.2	-s4 -l	1.31	257.11

colortype-0 — 80 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.98	1376.48
pingo	1.00	-s1 -l	1.11	1382.86
pingo	1.00	-s2 -l	1.31	1444.12
pingo	1.00	-s3 -l	1.26	1459.57
pingo	1.00	-s4 -l	1.21	1459.57
pingo	1.27.2	-s0 -l	0.46	1376.48
pingo	1.27.2	-s1 -l	0.93	1389.47
pingo	1.27.2	-s2 -l	1.22	1450.50
pingo	1.27.2	-s3 -l	1.22	1461.03
pingo	1.27.2	-s4 -l	1.26	1461.03

colortype-2 — 80 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.96	5939.97
pingo	1.00	-s1 -l	0.96	5940.20
pingo	1.00	-s2 -l	1.09	5948.04
pingo	1.00	-s3 -l	1.07	5951.73
pingo	1.00	-s4 -l	1.13	5954.42
pingo	1.27.2	-s0 -l	0.89	5920.60
pingo	1.27.2	-s1 -l	0.96	5929.67
pingo	1.27.2	-s2 -l	1.10	5939.97
pingo	1.27.2	-s3 -l	1.13	5941.43
pingo	1.27.2	-s4 -l	1.28	5948.04

colortype-3 — 80 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.69	767.41
pingo	1.00	-s1 -l	0.87	801.23
pingo	1.00	-s2 -l	1.22	819.37
pingo	1.00	-s3 -l	1.86	865.95
pingo	1.00	-s4 -l	1.92	867.41
pingo	1.27.2	-s0 -l	0.95	825.75
pingo	1.27.2	-s1 -l	1.10	862.26
pingo	1.27.2	-s2 -l	1.37	870.10
pingo	1.27.2	-s3 -l	1.92	926.98
pingo	1.27.2	-s4 -l	2.13	934.82

colortype-4 — 80 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.72	2776.48
pingo	1.00	-s1 -l	0.69	2777.71
pingo	1.00	-s2 -l	0.90	2784.32
pingo	1.00	-s3 -l	0.89	2789.47
pingo	1.00	-s4 -l	1.37	2790.70
pingo	1.27.2	-s0 -l	0.68	2766.18
pingo	1.27.2	-s1 -l	0.80	2776.48
pingo	1.27.2	-s2 -l	0.85	2785.55
pingo	1.27.2	-s3 -l	0.84	2789.47
pingo	1.27.2	-s4 -l	1.44	2790.70

colortype-6 — 80 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	1.13	7312.76
pingo	1.00	-s1 -l	1.16	7312.76
pingo	1.00	-s2 -l	1.44	7395.85
pingo	1.00	-s3 -l	1.47	7399.77
pingo	1.00	-s4 -l	1.54	7401.23
pingo	1.27.2	-s0 -l	1.05	7274.02
pingo	1.27.2	-s1 -l	1.23	7299.77
pingo	1.27.2	-s2 -l	1.48	7380.40
pingo	1.27.2	-s3 -l	1.61	7384.32
pingo	1.27.2	-s4 -l	2.06	7387.01

filter — 10 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	1.29	1476.48
pingo	1.00	-s1 -l	1.40	1481.63
pingo	1.00	-s2 -l	1.90	1523.29
pingo	1.00	-s3 -l	1.93	1523.29
pingo	1.00	-s4 -l	1.98	1523.29
pingo	1.27.2	-s0 -l	1.10	1473.79
pingo	1.27.2	-s1 -l	1.45	1481.63
pingo	1.27.2	-s2 -l	2.02	1523.29
pingo	1.27.2	-s3 -l	1.96	1523.29
pingo	1.27.2	-s4 -l	1.99	1526.98

content-chart — 10 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.50	1416.68
pingo	1.00	-s1 -l	0.52	1418.14
pingo	1.00	-s2 -l	0.65	1422.06
pingo	1.00	-s3 -l	0.62	1422.06
pingo	1.00	-s4 -l	0.63	1422.06
pingo	1.27.2	-s0 -l	0.46	1415.45
pingo	1.27.2	-s1 -l	0.56	1418.14
pingo	1.27.2	-s2 -l	0.65	1422.06
pingo	1.27.2	-s3 -l	0.63	1422.06
pingo	1.27.2	-s4 -l	0.60	1423.29

content-flat — 30 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.35	1757.11
pingo	1.00	-s1 -l	0.40	1757.11
pingo	1.00	-s2 -l	0.36	1758.34
pingo	1.00	-s3 -l	0.40	1758.34
pingo	1.00	-s4 -l	0.35	1758.34
pingo	1.27.2	-s0 -l	0.25	1761.03
pingo	1.27.2	-s1 -l	0.36	1761.03
pingo	1.27.2	-s2 -l	0.32	1762.26
pingo	1.27.2	-s3 -l	0.35	1762.26
pingo	1.27.2	-s4 -l	0.40	1762.26

content-gradient — 10 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.40	4322.06
pingo	1.00	-s1 -l	0.39	4324.52
pingo	1.00	-s2 -l	0.47	4320.60
pingo	1.00	-s3 -l	0.49	4320.60
pingo	1.00	-s4 -l	0.54	4320.60
pingo	1.27.2	-s0 -l	0.29	4316.68
pingo	1.27.2	-s1 -l	0.54	4268.64
pingo	1.27.2	-s2 -l	0.65	4265.95
pingo	1.27.2	-s3 -l	0.61	4265.95
pingo	1.27.2	-s4 -l	0.63	4265.95

content-icons-gradient — 10 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.33	1514.22
pingo	1.00	-s1 -l	0.34	1514.22
pingo	1.00	-s2 -l	0.49	1520.60
pingo	1.00	-s3 -l	0.50	1520.60
pingo	1.00	-s4 -l	0.50	1520.60
pingo	1.27.2	-s0 -l	0.28	1505.15
pingo	1.27.2	-s1 -l	0.33	1514.22
pingo	1.27.2	-s2 -l	0.48	1520.60
pingo	1.27.2	-s3 -l	0.50	1520.60
pingo	1.27.2	-s4 -l	0.52	1518.14

content-icons-realistic — 12 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.36	2428.44
pingo	1.00	-s1 -l	0.35	2428.44
pingo	1.00	-s2 -l	0.51	2462.26
pingo	1.00	-s3 -l	0.51	2462.26
pingo	1.00	-s4 -l	0.47	2462.26
pingo	1.27.2	-s0 -l	0.28	2404.92
pingo	1.27.2	-s1 -l	0.35	2431.13
pingo	1.27.2	-s2 -l	0.45	2463.49
pingo	1.27.2	-s3 -l	0.49	2463.49
pingo	1.27.2	-s4 -l	0.49	2463.49

content-icons-small — 49 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.56	1313.99
pingo	1.00	-s1 -l	0.60	1313.99
pingo	1.00	-s2 -l	0.62	1312.76
pingo	1.00	-s3 -l	0.61	1312.76
pingo	1.00	-s4 -l	0.78	1315.45
pingo	1.27.2	-s0 -l	0.44	1301.23
pingo	1.27.2	-s1 -l	0.56	1313.99
pingo	1.27.2	-s2 -l	0.60	1312.76
pingo	1.27.2	-s3 -l	0.64	1312.76
pingo	1.27.2	-s4 -l	0.92	1325.75

content-icons-small-palette — 121 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.41	318.14
pingo	1.00	-s1 -l	0.58	323.29
pingo	1.00	-s2 -l	0.74	325.75
pingo	1.00	-s3 -l	0.82	329.67
pingo	1.00	-s4 -l	0.88	330.90
pingo	1.27.2	-s0 -l	0.41	318.14
pingo	1.27.2	-s1 -l	0.61	323.29
pingo	1.27.2	-s2 -l	1.01	338.74
pingo	1.27.2	-s3 -l	1.21	344.12
pingo	1.27.2	-s4 -l	1.44	345.35

content-icons-very-small — 96 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.14	141.43
pingo	1.00	-s1 -l	0.13	141.43
pingo	1.00	-s2 -l	0.19	140.20
pingo	1.00	-s3 -l	0.20	140.20
pingo	1.00	-s4 -l	0.22	140.20
pingo	1.27.2	-s0 -l	0.14	141.43
pingo	1.27.2	-s1 -l	0.13	141.43
pingo	1.27.2	-s2 -l	0.23	140.20
pingo	1.27.2	-s3 -l	0.25	140.20
pingo	1.27.2	-s4 -l	0.25	140.20

content-low-colors — 80 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.99	7096.08
pingo	1.00	-s1 -l	1.10	7096.08
pingo	1.00	-s2 -l	1.61	7146.58
pingo	1.00	-s3 -l	1.71	7151.73
pingo	1.00	-s4 -l	1.68	7151.73
pingo	1.27.2	-s0 -l	0.76	7096.08
pingo	1.27.2	-s1 -l	1.06	7096.08
pingo	1.27.2	-s2 -l	1.73	7144.12
pingo	1.27.2	-s3 -l	1.72	7151.73
pingo	1.27.2	-s4 -l	1.65	7151.73

content-palettes — 140 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	3.11	5144.12
pingo	1.00	-s1 -l	3.76	5298.54
pingo	1.00	-s2 -l	5.72	5374.02
pingo	1.00	-s3 -l	7.86	5606.38
pingo	1.00	-s4 -l	7.81	5614.22
pingo	1.27.2	-s0 -l	2.86	5399.77
pingo	1.27.2	-s1 -l	3.95	5638.74
pingo	1.27.2	-s2 -l	5.32	5762.26
pingo	1.27.2	-s3 -l	7.31	5922.06
pingo	1.27.2	-s4 -l	7.78	5927.21

content-palettes-big — 4 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.80	547.81
pingo	1.00	-s1 -l	1.46	578.94
pingo	1.00	-s2 -l	1.64	580.40
pingo	1.00	-s3 -l	1.80	587.01
pingo	1.00	-s4 -l	1.90	617.91
pingo	1.27.2	-s0 -l	0.51	619.37
pingo	1.27.2	-s1 -l	1.28	653.19
pingo	1.27.2	-s2 -l	1.26	653.19
pingo	1.27.2	-s3 -l	1.39	653.19
pingo	1.27.2	-s4 -l	1.39	653.19

content-pics — 14 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.97	7200.00
pingo	1.00	-s1 -l	1.24	7228.44
pingo	1.00	-s2 -l	2.65	7353.19
pingo	1.00	-s3 -l	2.54	7353.19
pingo	1.00	-s4 -l	2.56	7353.19
pingo	1.27.2	-s0 -l	1.15	7054.42
pingo	1.27.2	-s1 -l	1.21	7058.34
pingo	1.27.2	-s2 -l	1.94	7132.36
pingo	1.27.2	-s3 -l	2.05	7144.12
pingo	1.27.2	-s4 -l	2.58	7215.45

content-pics-grayscale — 14 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.98	3299.77
pingo	1.00	-s1 -l	2.01	3398.54
pingo	1.00	-s2 -l	2.08	3398.54
pingo	1.00	-s3 -l	2.18	3402.46
pingo	1.00	-s4 -l	2.20	3402.46
pingo	1.27.2	-s0 -l	0.79	3299.77
pingo	1.27.2	-s1 -l	1.11	3309.07
pingo	1.27.2	-s2 -l	1.69	3367.41
pingo	1.27.2	-s3 -l	1.85	3356.88
pingo	1.27.2	-s4 -l	1.94	3345.35

content-screenshots — 9 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.50	1130.90
pingo	1.00	-s1 -l	0.45	1130.90
pingo	1.00	-s2 -l	0.96	1144.12
pingo	1.00	-s3 -l	0.92	1144.12
pingo	1.00	-s4 -l	0.85	1144.12
pingo	1.27.2	-s0 -l	0.44	1125.75
pingo	1.27.2	-s1 -l	0.44	1130.90
pingo	1.27.2	-s2 -l	0.89	1145.35
pingo	1.27.2	-s3 -l	0.83	1145.35
pingo	1.27.2	-s4 -l	0.96	1157.11

content-sprites — 12 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.35	1687.01
pingo	1.00	-s1 -l	0.33	1690.70
pingo	1.00	-s2 -l	0.51	1692.16
pingo	1.00	-s3 -l	0.68	1698.54
pingo	1.00	-s4 -l	0.70	1698.54
pingo	1.27.2	-s0 -l	0.33	1688.24
pingo	1.27.2	-s1 -l	0.39	1691.93
pingo	1.27.2	-s2 -l	0.53	1692.16
pingo	1.27.2	-s3 -l	0.85	1700.00
pingo	1.27.2	-s4 -l	0.86	1700.00

content-text — 11 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.60	882.86
pingo	1.00	-s1 -l	0.63	952.96
pingo	1.00	-s2 -l	1.12	965.95
pingo	1.00	-s3 -l	1.13	970.10
pingo	1.00	-s4 -l	1.18	970.10
pingo	1.27.2	-s0 -l	0.23	905.15
pingo	1.27.2	-s1 -l	0.39	955.65
pingo	1.27.2	-s2 -l	0.98	968.64
pingo	1.27.2	-s3 -l	1.04	973.79
pingo	1.27.2	-s4 -l	1.13	944.12

ordered-transform-2 — 80 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	1.09	3052.96
pingo	1.00	-s1 -l	1.17	3052.96
pingo	1.00	-s2 -l	1.24	3080.40
pingo	1.00	-s3 -l	1.29	3080.40
pingo	1.00	-s4 -l	1.34	3083.09
pingo	1.27.2	-s0 -l	0.91	2981.63
pingo	1.27.2	-s1 -l	1.18	3041.43
pingo	1.27.2	-s2 -l	1.25	3069.87
pingo	1.27.2	-s3 -l	1.30	3069.87
pingo	1.27.2	-s4 -l	1.77	3080.40

ordered-transform-4 — 80 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.73	12791.93
pingo	1.00	-s1 -l	0.80	12834.82
pingo	1.00	-s2 -l	1.39	12727.21
pingo	1.00	-s3 -l	1.64	12770.10
pingo	1.00	-s4 -l	1.59	12770.10
pingo	1.25	-s0 -l	0.76	12787.01
pingo	1.25	-s1 -l	0.83	12830.90
pingo	1.25	-s2 -l	1.35	12736.28
pingo	1.25	-s3 -l	1.55	12772.56
pingo	1.25	-s4 -l	1.60	12772.56
pingo	1.27	-s0 -l	1.00	12824.52
pingo	1.27	-s1 -l	1.09	12866.18
pingo	1.27	-s2 -l	1.68	12905.15
pingo	1.27	-s3 -l	1.72	12913.99
pingo	1.27	-s4 -l	1.81	12913.99

ordered-transform-6 — 80 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	0.71	2607.61
pingo	1.00	-s1 -l	0.83	2649.27
pingo	1.00	-s2 -l	1.26	2563.49
pingo	1.00	-s3 -l	1.52	2602.46
pingo	1.00	-s4 -l	1.47	2602.46
pingo	1.27.2	-s0 -l	1.03	2643.89
pingo	1.27.2	-s1 -l	1.13	2686.78
pingo	1.27.2	-s2 -l	1.57	2718.14
pingo	1.27.2	-s3 -l	1.81	2725.75
pingo	1.27.2	-s4 -l	1.80	2725.75

reductions — 48 files

tool	version	flag	time (s)	saved (KB)
pingo	1.00	-s0 -l	1.97	7271.33
pingo	1.00	-s1 -l	2.49	7335.05
pingo	1.00	-s2 -l	3.10	7381.63
pingo	1.00	-s3 -l	3.33	7410.30
pingo	1.00	-s4 -l	3.49	7410.30
pingo	1.27.2	-s0 -l	1.84	7239.97
pingo	1.27.2	-s1 -l	2.55	7373.79
pingo	1.27.2	-s2 -l	3.19	7410.30
pingo	1.27.2	-s3 -l	3.37	7435.05
pingo	1.27.2	-s4 -l	3.58	7443.89