image optimizer for web

WebP benchmark web lossless optimization

last updated: 21/07/2026

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
• time would be measured in seconds, savings in KB
• you can sort results by clicking on the column headers — javascript would be required
• 2webp is cwebp's clone with pingo's file handler (mp)

all sets — 1 354 files

tool	flag	time	saved
2webp 1.6.0	-z9	386.69	92648.82
pingo 1.28	-s4 -l	36.51	92231.60
pingo 1.28	-s3 -l	34.58	92213.45
pingo 1.28	-s2 -l	31.35	92160.59
pingo 1.28	-s1 -l	23.44	91532.91
pingo 1.28	-s0 -l	15.52	90276.26
2webp 1.6.0	-z8	45.06	86077.71
2webp 1.6.0	-z7	17.23	83264.81
2webp 1.6.0	-z6	13.14	82753.97
2webp 1.6.0	-z5	11.47	82332.60

alpha — 118 files

tool	flag	time	saved
2webp 1.6.0	-z9	7.40	4315.45
2webp 1.6.0	-z8	1.59	4255.65
pingo 1.28	-s4 -l	1.25	4241.43
pingo 1.28	-s3 -l	1.26	4241.43
pingo 1.28	-s2 -l	1.27	4241.43
pingo 1.28	-s1 -l	1.16	4234.82
2webp 1.6.0	-z7	0.77	4204.92
pingo 1.28	-s0 -l	0.61	4203.69
2webp 1.6.0	-z6	0.62	4189.47
2webp 1.6.0	-z5	0.53	4179.17

bitdepth-4 — 6 files

tool	flag	time	saved
2webp 1.6.0	-z9	3.75	178.94
pingo 1.28	-s3 -l	0.75	177.71
pingo 1.28	-s2 -l	0.76	177.71
2webp 1.6.0	-z8	0.58	173.79
2webp 1.6.0	-z7	0.26	173.79
pingo 1.28	-s4 -l	0.73	173.79
2webp 1.6.0	-z6	0.22	171.33
pingo 1.28	-s1 -l	0.37	171.33
pingo 1.28	-s0 -l	0.33	171.33
2webp 1.6.0	-z5	0.19	170.10

bitdepth-8 — 10 files

tool	flag	time	saved
2webp 1.6.0	-z9	7.44	273.79
pingo 1.28	-s3 -l	1.32	257.11
pingo 1.28	-s2 -l	1.22	257.11
2webp 1.6.0	-z8	0.91	252.96
2webp 1.6.0	-z7	0.51	251.73
2webp 1.6.0	-z6	0.48	251.73
pingo 1.28	-s1 -l	0.80	250.50
2webp 1.6.0	-z5	0.41	248.04
pingo 1.28	-s0 -l	0.72	242.66
pingo 1.28	-s4 -l	1.39	215.45

colortype-0 — 80 files

tool	flag	time	saved
2webp 1.6.0	-z9	16.87	1495.85
pingo 1.28	-s4 -l	1.23	1461.03
pingo 1.28	-s3 -l	1.20	1461.03
pingo 1.28	-s2 -l	1.20	1461.03
2webp 1.6.0	-z8	2.05	1458.34
pingo 1.28	-s1 -l	1.19	1450.50
pingo 1.28	-s0 -l	0.46	1376.48
2webp 1.6.0	-z7	0.42	1302.46
2webp 1.6.0	-z6	0.38	1300.00
2webp 1.6.0	-z5	0.32	1292.16

colortype-2 — 80 files

tool	flag	time	saved
2webp 1.6.0	-z9	14.88	6098.54
2webp 1.6.0	-z8	2.74	6029.67
pingo 1.28	-s3 -l	1.25	5948.04
pingo 1.28	-s4 -l	1.20	5947.81
pingo 1.28	-s2 -l	1.11	5941.43
pingo 1.28	-s1 -l	1.10	5939.97
pingo 1.28	-s0 -l	0.86	5922.06
2webp 1.6.0	-z7	0.88	5904.92
2webp 1.6.0	-z6	0.83	5898.54
2webp 1.6.0	-z5	0.79	5892.16

colortype-3 — 80 files

tool	flag	time	saved
pingo 1.28	-s4 -l	2.31	935.05
pingo 1.28	-s3 -l	2.11	931.13
pingo 1.28	-s2 -l	1.87	917.91
pingo 1.28	-s1 -l	0.80	857.11
2webp 1.6.0	-z9	22.94	837.51
pingo 1.28	-s0 -l	0.69	825.75
2webp 1.6.0	-z8	2.58	587.01
2webp 1.6.0	-z7	0.36	530.90
2webp 1.6.0	-z6	0.32	527.21
2webp 1.6.0	-z5	0.28	513.99

colortype-4 — 80 files

tool	flag	time	saved
2webp 1.6.0	-z9	13.49	2857.11
2webp 1.6.0	-z8	2.48	2817.91
pingo 1.28	-s4 -l	1.42	2790.70
pingo 1.28	-s3 -l	1.42	2790.70
pingo 1.28	-s2 -l	0.91	2789.47
pingo 1.28	-s1 -l	0.85	2782.86
2webp 1.6.0	-z7	0.66	2773.79
2webp 1.6.0	-z6	0.63	2765.95
pingo 1.28	-s0 -l	0.65	2764.72
2webp 1.6.0	-z5	0.58	2763.49

colortype-6 — 80 files

tool	flag	time	saved
2webp 1.6.0	-z9	17.36	7583.09
2webp 1.6.0	-z8	3.58	7479.17
pingo 1.28	-s3 -l	1.98	7387.01
pingo 1.28	-s2 -l	1.44	7384.32
pingo 1.28	-s4 -l	1.55	7383.09
pingo 1.28	-s1 -l	1.47	7376.48
2webp 1.6.0	-z7	1.06	7351.73
pingo 1.28	-s0 -l	1.03	7272.56
2webp 1.6.0	-z6	0.94	7218.14
2webp 1.6.0	-z5	0.83	7189.47

filter — 10 files

tool	flag	time	saved
2webp 1.6.0	-z9	5.68	1558.34
2webp 1.6.0	-z8	1.57	1542.66
pingo 1.28	-s3 -l	1.95	1526.98
pingo 1.28	-s4 -l	1.96	1523.29
pingo 1.28	-s2 -l	1.91	1523.29
pingo 1.28	-s1 -l	1.94	1523.29
2webp 1.6.0	-z7	1.31	1504.92
2webp 1.6.0	-z6	1.14	1481.63
pingo 1.28	-s0 -l	1.20	1473.79
2webp 1.6.0	-z5	1.03	1445.35

content-chart — 10 files

tool	flag	time	saved
2webp 1.6.0	-z9	12.74	1464.72
2webp 1.6.0	-z8	0.81	1430.90
pingo 1.28	-s4 -l	0.61	1423.29
pingo 1.28	-s3 -l	0.61	1423.29
pingo 1.28	-s2 -l	0.64	1422.06
pingo 1.28	-s1 -l	0.58	1422.06
2webp 1.6.0	-z7	0.55	1421.83
2webp 1.6.0	-z6	0.45	1417.91
pingo 1.28	-s0 -l	0.41	1415.45
2webp 1.6.0	-z5	0.43	1408.84

content-flat — 30 files

tool	flag	time	saved
2webp 1.6.0	-z9	4.09	1791.93
2webp 1.6.0	-z8	0.69	1773.79
2webp 1.6.0	-z7	0.22	1766.18
2webp 1.6.0	-z6	0.22	1766.18
2webp 1.6.0	-z5	0.21	1765.95
pingo 1.28	-s0 -l	0.25	1764.72
pingo 1.28	-s2 -l	0.37	1763.49
pingo 1.28	-s1 -l	0.39	1763.49
pingo 1.28	-s4 -l	0.44	1762.26
pingo 1.28	-s3 -l	0.43	1762.26

content-gradient — 10 files

tool	flag	time	saved
2webp 1.6.0	-z7	0.33	4320.60
2webp 1.6.0	-z6	0.31	4320.60
2webp 1.6.0	-z9	5.32	4319.37
2webp 1.6.0	-z5	0.27	4318.14
2webp 1.6.0	-z8	0.66	4317.91
pingo 1.28	-s4 -l	0.39	4315.45
pingo 1.28	-s3 -l	0.41	4315.45
pingo 1.28	-s2 -l	0.40	4315.45
pingo 1.28	-s1 -l	0.42	4315.45
pingo 1.28	-s0 -l	0.28	4313.99

content-icons-gradient — 10 files

tool	flag	time	saved
2webp 1.6.0	-z9	4.42	1565.95
2webp 1.6.0	-z8	0.95	1531.13
pingo 1.28	-s2 -l	0.45	1520.60
pingo 1.28	-s1 -l	0.45	1520.60
pingo 1.28	-s4 -l	0.51	1518.14
pingo 1.28	-s3 -l	0.47	1518.14
2webp 1.6.0	-z7	0.31	1507.61
pingo 1.28	-s0 -l	0.28	1505.15
2webp 1.6.0	-z6	0.23	1502.46
2webp 1.6.0	-z5	0.19	1499.77

content-icons-realistic — 12 files

tool	flag	time	saved
2webp 1.6.0	-z9	5.71	2485.55
2webp 1.6.0	-z8	0.97	2472.56
pingo 1.28	-s4 -l	0.48	2463.49
pingo 1.28	-s3 -l	0.46	2463.49
pingo 1.28	-s2 -l	0.49	2463.49
pingo 1.28	-s1 -l	0.47	2463.49
2webp 1.6.0	-z7	0.33	2419.37
pingo 1.28	-s0 -l	0.28	2404.92
2webp 1.6.0	-z5	0.20	2399.77
2webp 1.6.0	-z6	0.24	2393.39

content-icons-small — 49 files

tool	flag	time	saved
2webp 1.6.0	-z9	6.60	1383.09
2webp 1.6.0	-z8	0.84	1331.13
pingo 1.28	-s3 -l	0.94	1325.75
pingo 1.28	-s2 -l	0.59	1312.76
pingo 1.28	-s1 -l	0.61	1312.76
pingo 1.28	-s4 -l	0.64	1309.07
pingo 1.28	-s0 -l	0.44	1301.23
2webp 1.6.0	-z7	0.43	1294.62
2webp 1.6.0	-z6	0.41	1294.62
2webp 1.6.0	-z5	0.38	1294.62

content-icons-small-palette — 121 files

tool	flag	time	saved
pingo 1.28	-s4 -l	1.54	348.04
pingo 1.28	-s3 -l	1.45	345.35
pingo 1.28	-s2 -l	1.21	344.12
2webp 1.6.0	-z9	9.68	319.37
pingo 1.28	-s1 -l	0.69	318.14
pingo 1.28	-s0 -l	0.53	314.22
2webp 1.6.0	-z8	0.69	283.09
2webp 1.6.0	-z7	0.14	251.73
2webp 1.6.0	-z6	0.14	251.73
2webp 1.6.0	-z5	0.12	251.73

content-icons-very-small — 96 files

tool	flag	time	saved
2webp 1.6.0	-z9	1.58	150.50
2webp 1.6.0	-z8	0.17	148.04
2webp 1.6.0	-z7	0.04	147.81
2webp 1.6.0	-z6	0.06	147.81
2webp 1.6.0	-z5	0.06	146.58
pingo 1.28	-s4 -l	0.27	140.20
pingo 1.28	-s3 -l	0.27	140.20
pingo 1.28	-s2 -l	0.25	140.20
pingo 1.28	-s1 -l	0.14	119.37
pingo 1.28	-s0 -l	0.14	119.37

content-low-colors — 80 files

tool	flag	time	saved
2webp 1.6.0	-z9	17.99	7222.06
pingo 1.28	-s4 -l	1.68	7151.73
pingo 1.28	-s3 -l	1.62	7151.73
pingo 1.28	-s2 -l	1.67	7151.73
pingo 1.28	-s1 -l	1.63	7147.81
pingo 1.28	-s0 -l	0.72	7096.08
2webp 1.6.0	-z8	3.39	3935.05
2webp 1.6.0	-z7	1.11	3748.04
2webp 1.6.0	-z6	0.97	3729.67
2webp 1.6.0	-z5	0.88	3720.60

content-palettes — 140 files

tool	flag	time	saved
pingo 1.28	-s4 -l	8.01	5931.13
pingo 1.28	-s3 -l	7.53	5929.67
pingo 1.28	-s2 -l	6.87	5893.39
pingo 1.28	-s1 -l	3.88	5682.86
2webp 1.6.0	-z9	89.92	5639.97
pingo 1.28	-s0 -l	2.35	5387.01
2webp 1.6.0	-z8	5.60	4765.95
2webp 1.6.0	-z7	2.07	4134.82
2webp 1.6.0	-z6	1.63	4046.58
2webp 1.6.0	-z5	1.35	3978.94

content-palettes-big — 4 files

tool	flag	time	saved
pingo 1.28	-s4 -l	1.22	653.19
pingo 1.28	-s3 -l	1.22	653.19
pingo 1.28	-s2 -l	1.17	652.96
pingo 1.28	-s1 -l	1.20	652.96
pingo 1.28	-s0 -l	0.57	620.60
2webp 1.6.0	-z9	10.33	450.50
2webp 1.6.0	-z8	1.67	336.28
2webp 1.6.0	-z7	1.19	186.78
2webp 1.6.0	-z6	0.65	164.72
2webp 1.6.0	-z5	0.40	144.12

content-pics — 14 files

tool	flag	time	saved
2webp 1.6.0	-z9	23.06	7324.52
pingo 1.28	-s4 -l	2.50	7184.32
pingo 1.28	-s3 -l	1.99	7144.12
pingo 1.28	-s2 -l	1.90	7132.36
pingo 1.28	-s1 -l	1.28	7058.34
pingo 1.28	-s0 -l	1.08	7054.42
2webp 1.6.0	-z8	3.47	7029.67
2webp 1.6.0	-z7	3.00	6700.00
2webp 1.6.0	-z6	1.09	6666.18
2webp 1.6.0	-z5	0.94	6640.20

content-pics-grayscale — 14 files

tool	flag	time	saved
2webp 1.6.0	-z9	17.81	3416.68
pingo 1.28	-s4 -l	1.84	3399.77
pingo 1.28	-s3 -l	1.85	3393.39
pingo 1.28	-s2 -l	1.75	3393.39
2webp 1.6.0	-z8	1.96	3367.41
pingo 1.28	-s1 -l	1.29	3342.66
2webp 1.6.0	-z7	1.43	3305.15
pingo 1.28	-s0 -l	0.68	3304.92
2webp 1.6.0	-z6	0.92	3261.03
2webp 1.6.0	-z5	0.71	3261.03

content-screenshots — 9 files

tool	flag	time	saved
2webp 1.6.0	-z9	3.65	1168.64
pingo 1.28	-s1 -l	0.88	1154.42
pingo 1.28	-s4 -l	0.86	1153.19
pingo 1.28	-s3 -l	0.88	1153.19
pingo 1.28	-s2 -l	0.86	1152.96
2webp 1.6.0	-z8	1.19	1150.50
pingo 1.28	-s0 -l	0.39	1137.51
2webp 1.6.0	-z7	0.66	1124.52
2webp 1.6.0	-z6	0.36	1120.60
2webp 1.6.0	-z5	0.33	1114.22

content-sprites — 12 files

tool	flag	time	saved
2webp 1.6.0	-z9	8.17	1724.52
2webp 1.6.0	-z8	1.06	1715.45
pingo 1.28	-s3 -l	0.83	1700.00
pingo 1.28	-s2 -l	0.85	1700.00
pingo 1.28	-s4 -l	0.79	1699.77
pingo 1.28	-s1 -l	0.47	1692.16
pingo 1.28	-s0 -l	0.33	1689.47
2webp 1.6.0	-z7	0.31	1686.78
2webp 1.6.0	-z6	0.27	1681.63
2webp 1.6.0	-z5	0.25	1676.48

content-text — 11 files

tool	flag	time	saved
2webp 1.6.0	-z9	10.60	995.85
2webp 1.6.0	-z7	0.70	976.48
2webp 1.6.0	-z8	0.77	975.25
pingo 1.28	-s2 -l	0.99	973.79
pingo 1.28	-s1 -l	1.02	968.64
2webp 1.6.0	-z6	0.32	965.95
pingo 1.28	-s4 -l	1.04	944.12
pingo 1.28	-s3 -l	1.03	944.12
pingo 1.28	-s0 -l	0.27	905.15
2webp 1.6.0	-z5	0.28	880.40

ordered-transform-2 — 80 files

tool	flag	time	saved
2webp 1.6.0	-z9	14.02	3209.07
2webp 1.6.0	-z8	2.77	3141.43
pingo 1.28	-s3 -l	1.75	3080.40
pingo 1.28	-s4 -l	1.40	3076.48
pingo 1.28	-s2 -l	1.30	3069.87
pingo 1.28	-s1 -l	1.30	3069.87
2webp 1.6.0	-z7	0.94	3011.53
pingo 1.28	-s0 -l	0.94	2981.63
2webp 1.6.0	-z6	0.84	2979.17
2webp 1.6.0	-z5	0.78	2975.25

ordered-transform-4 — 80 files

tool	flag	time	saved
pingo 1.28	-s4 -l	1.75	12913.99
pingo 1.28	-s3 -l	1.78	12913.99
pingo 1.28	-s2 -l	1.79	12913.99
pingo 1.28	-s1 -l	0.87	12869.87
pingo 1.28	-s0 -l	0.72	12829.67
2webp 1.6.0	-z9	20.64	12771.33
2webp 1.6.0	-z8	2.55	12375.25
2webp 1.6.0	-z7	0.42	12206.38
2webp 1.6.0	-z6	0.39	12203.69
2webp 1.6.0	-z5	0.34	12184.32

ordered-transform-6 — 80 files

tool	flag	time	saved
pingo 1.28	-s4 -l	1.84	2725.75
pingo 1.28	-s3 -l	1.82	2725.75
pingo 1.28	-s2 -l	1.85	2725.75
pingo 1.28	-s1 -l	0.86	2691.93
pingo 1.28	-s0 -l	0.73	2649.27
2webp 1.6.0	-z9	20.67	2614.22
2webp 1.6.0	-z8	2.53	2267.41
2webp 1.6.0	-z7	0.44	2055.65
2webp 1.6.0	-z6	0.39	2052.96
2webp 1.6.0	-z5	0.35	2032.36

reductions — 48 files

tool	flag	time	saved
2webp 1.6.0	-z9	25.45	7432.36
pingo 1.28	-s4 -l	3.46	7428.44
pingo 1.28	-s3 -l	3.45	7426.98
pingo 1.28	-s2 -l	3.22	7424.52
pingo 1.28	-s1 -l	2.84	7379.17
pingo 1.28	-s0 -l	1.77	7228.44
2webp 1.6.0	-z8	3.58	7132.36
2webp 1.6.0	-z7	1.90	6999.77
2webp 1.6.0	-z6	1.71	6983.09
2webp 1.6.0	-z5	1.47	6945.35