This page provides information about the usage of the IE CSS Optimizer project, including summaries across all versions and details for each release. For each week beginning on the given date the figures show the number of sites that reported they are using a given version of the project.

IE CSS Optimizer project page
Usage statistics for all projects

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Week starting 6.x-1.x Total
June 14th, 2026 71 71
June 7th, 2026 71 71
May 31st, 2026 71 71
May 24th, 2026 73 73
May 17th, 2026 68 68
May 10th, 2026 73 73
May 3rd, 2026 73 73
April 26th, 2026 72 72
April 19th, 2026 79 79
April 12th, 2026 80 80
April 5th, 2026 76 76
March 29th, 2026 73 73
March 22nd, 2026 77 77
March 15th, 2026 82 82
March 8th, 2026 77 77
February 22nd, 2026 84 84
February 15th, 2026 84 84
February 8th, 2026 75 75
February 1st, 2026 93 93
January 25th, 2026 75 75
January 18th, 2026 79 79
January 11th, 2026 72 72
January 4th, 2026 73 73
December 28th, 2025 80 80
December 21st, 2025 76 76
December 14th, 2025 83 83
December 7th, 2025 76 76
November 30th, 2025 77 77
November 23rd, 2025 85 85
November 16th, 2025 83 83
November 9th, 2025 101 101
November 2nd, 2025 83 83
October 26th, 2025 82 82
October 19th, 2025 85 85
October 12th, 2025 106 106
October 5th, 2025 74 74
September 28th, 2025 73 73
September 21st, 2025 76 76
September 14th, 2025 81 81
September 7th, 2025 95 95
August 31st, 2025 110 110
August 24th, 2025 89 89
August 17th, 2025 85 85
August 10th, 2025 94 94
August 3rd, 2025 100 100
July 27th, 2025 97 97
July 20th, 2025 120 120
July 13th, 2025 115 115
July 6th, 2025 105 105
June 29th, 2025 99 99
June 22nd, 2025 104 104
June 15th, 2025 107 107
June 8th, 2025 96 96
June 1st, 2025 101 101
May 25th, 2025 97 97
May 18th, 2025 109 109
May 11th, 2025 107 107
May 4th, 2025 113 113
April 27th, 2025 116 116
April 20th, 2025 114 114
April 13th, 2025 118 118
April 6th, 2025 113 113
March 30th, 2025 108 108
March 23rd, 2025 118 118
March 16th, 2025 109 109
March 9th, 2025 110 110
March 2nd, 2025 111 111
February 23rd, 2025 113 113
February 16th, 2025 119 119
February 9th, 2025 111 111
February 2nd, 2025 106 106
January 26th, 2025 108 108
January 19th, 2025 109 109
January 12th, 2025 115 115
January 5th, 2025 137 137
December 29th, 2024 113 113
December 22nd, 2024 116 116
December 15th, 2024 113 113
December 8th, 2024 116 116
December 1st, 2024 107 107
November 24th, 2024 108 108
November 17th, 2024 112 112
November 10th, 2024 112 112
November 3rd, 2024 115 115
October 27th, 2024 131 131
October 20th, 2024 120 120
October 13th, 2024 115 115
October 6th, 2024 119 119
September 29th, 2024 119 119
September 22nd, 2024 118 118
September 15th, 2024 115 115
September 8th, 2024 150 150
September 1st, 2024 110 110
August 25th, 2024 116 116
August 18th, 2024 114 114
August 11th, 2024 109 109
August 4th, 2024 110 110
July 28th, 2024 105 105
July 21st, 2024 145 145
July 14th, 2024 110 110
July 7th, 2024 85 85
June 30th, 2024 118 118
June 23rd, 2024 115 115
June 16th, 2024 122 122
June 9th, 2024 119 119
June 2nd, 2024 128 128
May 26th, 2024 116 116
May 19th, 2024 107 107
May 12th, 2024 115 115
May 5th, 2024 108 108
April 28th, 2024 126 126
April 21st, 2024 132 132
April 14th, 2024 127 127
April 7th, 2024 121 121
March 31st, 2024 124 124
March 24th, 2024 125 125
March 17th, 2024 128 128
March 10th, 2024 132 132
March 3rd, 2024 122 122
February 25th, 2024 119 119
February 18th, 2024 135 135
February 11th, 2024 151 151
February 4th, 2024 155 155
January 28th, 2024 144 144
January 21st, 2024 136 136
January 14th, 2024 150 150
January 7th, 2024 156 156
December 31st, 2023 149 149
December 24th, 2023 147 147
December 17th, 2023 156 156
December 10th, 2023 155 155
December 3rd, 2023 144 144
November 26th, 2023 162 162
November 19th, 2023 155 155
November 12th, 2023 146 146
November 5th, 2023 161 161
October 29th, 2023 152 152
October 22nd, 2023 151 151
October 15th, 2023 150 150
October 8th, 2023 163 163
October 1st, 2023 153 153
September 24th, 2023 149 149
September 17th, 2023 151 151
September 10th, 2023 155 155
September 3rd, 2023 153 153
August 27th, 2023 158 158
August 20th, 2023 161 161
August 13th, 2023 163 163
August 6th, 2023 174 174
July 30th, 2023 170 170
July 23rd, 2023 158 158
July 16th, 2023 159 159
July 9th, 2023 168 168
July 2nd, 2023 155 155
June 25th, 2023 159 159
June 18th, 2023 164 164
June 11th, 2023 213 213
June 4th, 2023 162 162
May 28th, 2023 164 164
May 21st, 2023 172 172
May 14th, 2023 173 173
May 7th, 2023 157 157
April 30th, 2023 166 166
April 23rd, 2023 210 210
April 16th, 2023 173 173
April 9th, 2023 160 160
April 2nd, 2023 164 164
March 26th, 2023 173 173
March 19th, 2023 215 215
March 12th, 2023 159 159
March 5th, 2023 164 164
February 26th, 2023 170 170
February 19th, 2023 166 166
February 12th, 2023 160 160
February 5th, 2023 176 176
January 29th, 2023 170 170
January 22nd, 2023 181 181
January 15th, 2023 187 187
January 8th, 2023 168 168
January 1st, 2023 165 165
December 25th, 2022 178 178
December 18th, 2022 169 169
December 11th, 2022 174 174
December 4th, 2022 167 167
November 27th, 2022 189 189
November 20th, 2022 189 189
November 13th, 2022 192 192
November 6th, 2022 191 191
October 30th, 2022 192 192
October 23rd, 2022 189 189
October 16th, 2022 192 192
October 9th, 2022 194 194
October 2nd, 2022 183 183
September 25th, 2022 196 196
September 18th, 2022 203 203
September 11th, 2022 184 184
September 4th, 2022 192 192
August 28th, 2022 193 193
August 21st, 2022 191 191
August 14th, 2022 195 195
August 7th, 2022 199 199
July 31st, 2022 194 194
July 24th, 2022 196 196
July 17th, 2022 193 193
July 10th, 2022 201 201
July 3rd, 2022 185 185
June 26th, 2022 202 202
June 19th, 2022 196 196
June 12th, 2022 243 243
June 5th, 2022 179 179
May 29th, 2022 206 206
May 22nd, 2022 202 202
May 15th, 2022 210 210
May 8th, 2022 266 266
May 1st, 2022 234 234
April 24th, 2022 206 206
April 17th, 2022 215 215
April 10th, 2022 207 207
April 3rd, 2022 213 213
March 27th, 2022 209 209
March 20th, 2022 255 255
March 13th, 2022 209 209
March 6th, 2022 210 210
February 27th, 2022 202 202
February 20th, 2022 211 211
February 13th, 2022 216 216
February 6th, 2022 217 217
January 30th, 2022 214 214
January 23rd, 2022 217 217
January 16th, 2022 220 220
January 9th, 2022 216 216
January 2nd, 2022 219 219
December 26th, 2021 217 217
December 19th, 2021 225 225
December 12th, 2021 228 228
December 5th, 2021 215 215
November 28th, 2021 262 262
November 21st, 2021 228 228
November 14th, 2021 231 231
November 7th, 2021 231 231
October 31st, 2021 238 238
October 24th, 2021 242 242
October 17th, 2021 245 245
October 10th, 2021 230 230
October 3rd, 2021 224 224
September 26th, 2021 255 255
September 19th, 2021 242 242
September 12th, 2021 251 251
September 5th, 2021 239 239
August 29th, 2021 242 242
August 22nd, 2021 240 240
August 15th, 2021 248 248
August 8th, 2021 241 241
August 1st, 2021 252 252
July 25th, 2021 246 246
July 18th, 2021 245 245
July 11th, 2021 263 263
July 4th, 2021 250 250
June 27th, 2021 263 263
June 20th, 2021 265 265
June 13th, 2021 268 268
June 6th, 2021 275 275
May 30th, 2021 278 278
May 23rd, 2021 270 270
May 16th, 2021 288 288
May 9th, 2021 273 273
May 2nd, 2021 261 261
April 25th, 2021 273 273
April 18th, 2021 287 287
April 11th, 2021 276 276
April 4th, 2021 280 280
March 28th, 2021 278 278
March 21st, 2021 291 291
March 14th, 2021 298 298
March 7th, 2021 292 292
February 28th, 2021 312 312
February 21st, 2021 310 310
February 14th, 2021 320 320
February 7th, 2021 315 315
January 31st, 2021 325 325
January 24th, 2021 308 308
January 17th, 2021 346 346
January 10th, 2021 323 323
January 3rd, 2021 322 322
December 27th, 2020 325 325
December 20th, 2020 317 317
December 13th, 2020 316 316
December 6th, 2020 307 307
November 29th, 2020 325 325
November 22nd, 2020 328 328
November 15th, 2020 363 363
November 8th, 2020 359 359
November 1st, 2020 348 348
October 25th, 2020 332 332
October 18th, 2020 346 346
October 11th, 2020 334 334
October 4th, 2020 321 321
September 27th, 2020 355 355
September 20th, 2020 387 387
September 13th, 2020 351 351
September 6th, 2020 344 344
August 30th, 2020 339 339
August 23rd, 2020 354 354
August 16th, 2020 355 355
August 9th, 2020 351 351
August 2nd, 2020 339 339
July 26th, 2020 355 355
July 19th, 2020 359 359
July 12th, 2020 370 370
July 5th, 2020 345 345
June 28th, 2020 367 367
June 21st, 2020 380 380
June 14th, 2020 379 379
June 7th, 2020 388 388
May 31st, 2020 385 385
May 24th, 2020 380 380
May 17th, 2020 400 400
May 10th, 2020 394 394
May 3rd, 2020 354 354
April 26th, 2020 385 385
April 19th, 2020 391 391
April 12th, 2020 385 385
April 5th, 2020 391 391
March 29th, 2020 407 407
March 22nd, 2020 397 397
March 15th, 2020 436 436
March 8th, 2020 445 445
March 1st, 2020 453 453
February 23rd, 2020 412 412
February 16th, 2020 451 451
February 9th, 2020 469 469
February 2nd, 2020 477 477
January 26th, 2020 467 467
January 19th, 2020 486 486
January 12th, 2020 488 488
January 5th, 2020 494 494
December 29th, 2019 504 504
December 22nd, 2019 497 497
December 15th, 2019 495 495
December 8th, 2019 518 518
December 1st, 2019 530 530
November 24th, 2019 521 521
November 17th, 2019 527 527
November 10th, 2019 529 529
November 3rd, 2019 532 532
October 27th, 2019 538 538
October 20th, 2019 533 533
October 13th, 2019 548 548
October 6th, 2019 519 519
September 29th, 2019 567 567
September 22nd, 2019 568 568
September 15th, 2019 593 593
September 8th, 2019 590 590
September 1st, 2019 595 595
August 25th, 2019 587 587
August 18th, 2019 594 594
August 11th, 2019 596 596
August 4th, 2019 603 603
July 28th, 2019 633 633
July 21st, 2019 607 607
July 14th, 2019 623 623
July 7th, 2019 605 605
June 30th, 2019 628 628
June 23rd, 2019 643 643
June 16th, 2019 654 654
June 9th, 2019 642 642
June 2nd, 2019 646 646
May 26th, 2019 669 669
May 19th, 2019 642 642
May 12th, 2019 638 638
May 5th, 2019 616 616
April 28th, 2019 656 656
April 21st, 2019 657 657
April 14th, 2019 659 659
April 7th, 2019 658 658
March 31st, 2019 680 680
March 24th, 2019 672 672
March 17th, 2019 673 673
March 10th, 2019 676 676
March 3rd, 2019 692 692
February 24th, 2019 699 699
February 17th, 2019 710 710
February 10th, 2019 718 718
February 3rd, 2019 715 715
January 27th, 2019 716 716
January 20th, 2019 739 739
January 13th, 2019 723 723
January 6th, 2019 726 726
December 30th, 2018 729 729
December 23rd, 2018 741 741
December 16th, 2018 739 739
December 9th, 2018 758 758
December 2nd, 2018 691 691
November 25th, 2018 770 770
November 18th, 2018 766 766
November 11th, 2018 777 777
November 4th, 2018 779 779
October 28th, 2018 784 784
October 21st, 2018 787 787
October 14th, 2018 791 791
October 7th, 2018 753 753
September 30th, 2018 784 784
September 23rd, 2018 797 797
September 16th, 2018 806 806
September 9th, 2018 821 821
September 2nd, 2018 825 825
August 26th, 2018 825 825
August 19th, 2018 826 826
August 12th, 2018 827 827
August 5th, 2018 823 823
July 29th, 2018 852 852
July 22nd, 2018 851 851
July 15th, 2018 804 804
July 8th, 2018 832 832
July 1st, 2018 806 806
June 24th, 2018 897 897
June 17th, 2018 890 890
June 10th, 2018 894 894
June 3rd, 2018 911 911
May 27th, 2018 934 934
May 20th, 2018 920 920
May 13th, 2018 929 929
May 6th, 2018 875 875
April 29th, 2018 1118 1118
April 22nd, 2018 974 974
April 15th, 2018 965 965
April 8th, 2018 961 961
April 1st, 2018 959 959
March 25th, 2018 1000 1000
March 18th, 2018 973 973
March 11th, 2018 1005 1005
March 4th, 2018 1007 1007
February 25th, 2018 1003 1003
February 18th, 2018 1006 1006
February 11th, 2018 1024 1024
February 4th, 2018 1031 1031
January 28th, 2018 1043 1043
January 21st, 2018 1052 1052
January 14th, 2018 1060 1060
January 7th, 2018 1050 1050
December 31st, 2017 1060 1060
December 24th, 2017 1067 1067
December 17th, 2017 1070 1070
December 10th, 2017 1086 1086
December 3rd, 2017 999 999
November 26th, 2017 1094 1094
November 19th, 2017 1092 1092
November 12th, 2017 1128 1128
November 5th, 2017 1110 1110
October 29th, 2017 1120 1120
October 22nd, 2017 1135 1135
October 15th, 2017 1129 1129
October 8th, 2017 1151 1151
October 1st, 2017 1142 1142
September 24th, 2017 1152 1152
September 17th, 2017 1179 1179
September 10th, 2017 1194 1194
September 3rd, 2017 1202 1202
August 27th, 2017 1200 1200
August 20th, 2017 1228 1228
August 13th, 2017 1188 1188
August 6th, 2017 1228 1228
July 30th, 2017 1281 1281
July 23rd, 2017 1280 1280
July 16th, 2017 1288 1288
July 9th, 2017 1280 1280
July 2nd, 2017 1238 1238
June 25th, 2017 1293 1293
June 18th, 2017 1309 1309
June 11th, 2017 1328 1328
June 4th, 2017 1336 1336
May 28th, 2017 1378 1378
May 21st, 2017 1358 1358
May 14th, 2017 1380 1380
May 7th, 2017 1306 1306
April 30th, 2017 1397 1397
April 23rd, 2017 1375 1375
April 16th, 2017 1399 1399
April 9th, 2017 1390 1390
April 2nd, 2017 1382 1382
March 26th, 2017 1408 1408
March 19th, 2017 1392 1392
March 12th, 2017 1411 1411
March 5th, 2017 1436 1436
February 26th, 2017 1411 1411
February 19th, 2017 1456 1456
February 12th, 2017 1461 1461
February 5th, 2017 1438 1438
January 29th, 2017 1456 1456
January 22nd, 2017 1500 1500
January 15th, 2017 1496 1496
January 8th, 2017 1463 1463
January 1st, 2017 1477 1477
December 25th, 2016 1466 1466
December 18th, 2016 1475 1475
December 11th, 2016 1522 1522
December 4th, 2016 1460 1460
November 27th, 2016 1539 1539
November 20th, 2016 1536 1536
November 13th, 2016 1570 1570
November 6th, 2016 1603 1603
October 30th, 2016 1590 1590
October 23rd, 2016 1628 1628
October 16th, 2016 1616 1616
October 9th, 2016 1577 1577
October 2nd, 2016 1567 1567
September 25th, 2016 1623 1623
September 18th, 2016 1600 1600
September 11th, 2016 1605 1605
September 4th, 2016 1657 1657
August 28th, 2016 1664 1664
August 21st, 2016 1715 1715
August 14th, 2016 1852 1852
August 7th, 2016 1713 1713
July 31st, 2016 1708 1708
July 24th, 2016 1788 1788
July 17th, 2016 1947 1947
July 10th, 2016 2039 2039
July 3rd, 2016 1682 1682
June 26th, 2016 1785 1785
June 19th, 2016 1821 1821
June 12th, 2016 1813 1813
June 5th, 2016 1831 1831
May 29th, 2016 1851 1851
May 22nd, 2016 1862 1862
May 15th, 2016 1917 1917
May 8th, 2016 1906 1906
May 1st, 2016 1914 1914
April 24th, 2016 1931 1931
April 17th, 2016 1925 1925
April 10th, 2016 1949 1949
April 3rd, 2016 1993 1993
March 27th, 2016 1995 1995
March 20th, 2016 2000 2000
March 13th, 2016 2016 2016
March 6th, 2016 2036 2036
February 28th, 2016 2106 2106
February 21st, 2016 2186 2186
February 14th, 2016 2120 2120
February 7th, 2016 1982 1982
January 31st, 2016 2065 2065
January 24th, 2016 2080 2080
January 17th, 2016 2076 2076
January 10th, 2016 2099 2099
January 3rd, 2016 2097 2097
December 27th, 2015 2042 2042
December 20th, 2015 2113 2113
December 13th, 2015 2133 2133
December 6th, 2015 2024 2024
November 29th, 2015 2166 2166
November 22nd, 2015 2147 2147
November 15th, 2015 2213 2213
November 8th, 2015 2234 2234
November 1st, 2015 2295 2295
October 25th, 2015 2270 2270
October 18th, 2015 2278 2278
October 11th, 2015 2272 2272
October 4th, 2015 2181 2181
September 27th, 2015 2167 2167
September 20th, 2015 2085 2085
September 13th, 2015 2295 2295
September 6th, 2015 2320 2320
August 30th, 2015 2329 2329
August 23rd, 2015 2381 2381
August 16th, 2015 2440 2440
August 9th, 2015 2348 2348
August 2nd, 2015 2335 2335
July 26th, 2015 2366 2366
July 19th, 2015 2432 2432
July 12th, 2015 2384 2384
July 5th, 2015 2308 2308
June 28th, 2015 2396 2396
June 21st, 2015 2463 2463
June 14th, 2015 2526 2526
June 7th, 2015 2475 2475
May 31st, 2015 2451 2451
May 24th, 2015 2509 2509
May 17th, 2015 2518 2518
May 10th, 2015 2545 2545
May 3rd, 2015 2482 2482
April 26th, 2015 2587 2587
April 19th, 2015 2567 2567
April 12th, 2015 2555 2555
April 5th, 2015 2596 2596
March 29th, 2015 2601 2601
March 22nd, 2015 2657 2657
March 15th, 2015 2840 2840
March 8th, 2015 2707 2707
March 1st, 2015 2764 2764
February 22nd, 2015 3182 3182
February 15th, 2015 2678 2678
February 8th, 2015 2724 2724
February 1st, 2015 2689 2689
January 25th, 2015 2707 2707
January 18th, 2015 2693 2693
January 11th, 2015 2668 2668
January 4th, 2015 2697 2697
December 28th, 2014 2598 2598
December 21st, 2014 2648 2648
December 14th, 2014 2786 2786
December 7th, 2014 2674 2674
November 30th, 2014 2854 2854
November 23rd, 2014 2854 2854
November 16th, 2014 2890 2890
November 9th, 2014 2810 2810
November 2nd, 2014 2851 2851
October 26th, 2014 2880 2880
October 19th, 2014 2807 2807
October 12th, 2014 2865 2865
October 5th, 2014 2768 2768
September 28th, 2014 2875 2875
September 21st, 2014 2865 2865
September 14th, 2014 2895 2895
September 7th, 2014 2915 2915
August 31st, 2014 2912 2912
August 24th, 2014 2950 2950
August 17th, 2014 2963 2963
August 10th, 2014 3024 3024
August 3rd, 2014 3081 3081
July 27th, 2014 3027 3027
July 20th, 2014 3000 3000
July 13th, 2014 3015 3015
July 6th, 2014 2927 2927
June 29th, 2014 2964 2964
June 22nd, 2014 2935 2935
June 15th, 2014 2962 2962
June 8th, 2014 3042 3042
June 1st, 2014 3055 3055
May 25th, 2014 3030 3030
May 18th, 2014 3014 3014
May 11th, 2014 3150 3150
May 4th, 2014 3040 3040
April 27th, 2014 3170 3170
April 20th, 2014 3200 3200
April 13th, 2014 3175 3175
April 6th, 2014 3186 3186
March 30th, 2014 3295 3295
March 23rd, 2014 3285 3285
March 16th, 2014 3284 3284
March 9th, 2014 3361 3361
March 2nd, 2014 3286 3286
February 23rd, 2014 3404 3404
February 16th, 2014 3295 3295
February 9th, 2014 3386 3386
February 2nd, 2014 3305 3305
January 26th, 2014 3334 3334
January 19th, 2014 3457 3457
January 12th, 2014 3297 3297
January 5th, 2014 3367 3367
December 29th, 2013 3258 3258
December 22nd, 2013 3203 3203
December 15th, 2013 3335 3335
December 8th, 2013 3447 3447
December 1st, 2013 3514 3514
November 24th, 2013 3454 3454
November 17th, 2013 3448 3448
November 10th, 2013 3506 3506
November 3rd, 2013 3497 3497
October 27th, 2013 4883 4883
October 20th, 2013 5568 5568
October 13th, 2013 5586 5586
October 6th, 2013 5620 5620
September 29th, 2013 5654 5654
September 22nd, 2013 5676 5676
September 15th, 2013 5695 5695
September 8th, 2013 5758 5758
September 1st, 2013 7173 7173
August 25th, 2013 11596 11596
August 18th, 2013 5644 5644
August 11th, 2013 5489 5489
August 4th, 2013 5699 5699
July 28th, 2013 5756 5756
July 21st, 2013 5821 5821
July 14th, 2013 5822 5822
July 7th, 2013 5774 5774
June 30th, 2013 5768 5768
June 23rd, 2013 4631 4631
June 16th, 2013 3892 3892
June 9th, 2013 3856 3856
June 2nd, 2013 3933 3933
May 26th, 2013 3904 3904
May 19th, 2013 3477 3477
May 12th, 2013 4004 4004
May 5th, 2013 3859 3859
April 28th, 2013 3966 3966
April 21st, 2013 3976 3976
April 14th, 2013 3983 3983
April 7th, 2013 4054 4054
March 31st, 2013 4016 4016
March 24th, 2013 4019 4019
March 17th, 2013 4138 4138
March 10th, 2013 4156 4156
March 3rd, 2013 4188 4188
February 24th, 2013 4251 4251
February 17th, 2013 4232 4232
February 10th, 2013 4302 4302
February 3rd, 2013 5746 5746
January 27th, 2013 4393 4393
January 20th, 2013 4370 4370
January 13th, 2013 4345 4345
January 6th, 2013 4291 4291
December 30th, 2012 4090 4090
December 23rd, 2012 3962 3962
December 16th, 2012 4359 4359
December 9th, 2012 4337 4337
December 2nd, 2012 4316 4316
November 25th, 2012 4364 4364
November 18th, 2012 4202 4202
November 11th, 2012 4320 4320
November 4th, 2012 4248 4248
October 28th, 2012 4374 4374
October 21st, 2012 4372 4372

Recent release usage

Release June 14th, 2026 June 7th, 2026 May 31st, 2026 May 24th, 2026 May 17th, 2026 May 10th, 2026
6.x-1.x-dev 1 1 1 1 1 1
6.x-1.0-beta1 0 1 0 0 0 0
6.x-1.0 1 1 1 1 1 1
6.x-1.1 69 68 69 71 66 71

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