Minifier Benchmarks
May 1, 2026 · View on GitHub
A collection of regularly updated benchmarks for HTML+ minifiers (context).
Two tests are run: One exclusively applying HTML minification (with the most aggressive settings that do not impact conformance), the other enabling all minification features the respective minifier offers (this is play—it’s not a fair comparison and may exceed project needs).
- 👩💻 Minifier user? Compare HTML minifiers by HTML minification effectiveness, by maximum effectiveness (all minification and tree-shaking options enabled), and by the respective processing times
- 🧑🏭 Minifier author? Add and configure your minifier and become a co-owner
- 💁 Innocent bystander? Please share observations and suggestions
0. Minifier Overview
| @swc/html | HTML Minifier Next | htmlcompressor.com | htmlnano | minify-html | minimize | |
|---|---|---|---|---|---|---|
| Last npm update |  |  | n/a |  |  |  |
| Socket health status | n/a | |||||
| GitHub sponsors |  |  | n/a | n/a | n/a | n/a |
1. HTML Minification Compared
| Site | Original Size (KB) | @swc/html | HTML Minifier Next | htmlcompressor.com | htmlnano | minify-html | minimize |
|---|---|---|---|---|---|---|---|
| Minifier Test | 31 | 26 (–17.2%) | 25 (–19.6%) | 26 (–17%) | 26 (–16.5%) | 25 (–19.2%) | 26 (–16.3%) |
| A List Apart | 64 | 60 (–6.4%) | 58 (–8.9%) | 59 (–7.2%) | 59 (–8.2%) | 58 (–8.9%) | 59 (–7.3%) |
| Apple | 244 | 232 (–5.1%) | 225 (–7.8%) | 230 (–5.8%) | 229 (–6.3%) | 228 (–6.9%) | 230 (–6.1%) |
| BBC | 701 | 697 (–0.7%) | 691 (–1.5%) | n/a | 695 (–0.9%) | 692 (–1.4%) | 696 (–0.8%) |
| Bun | 461 | 451 (–2.2%) | 441 (–4.2%) | n/a | 454 (–1.5%) | 452 (–2%) | 455 (–1.3%) |
| CERN | 151 | 93 (–38.3%) | 82 (–45.8%) | 96 (–36.7%) | 92 (–39.1%) | 92 (–39.5%) | 93 (–38.5%) |
| CSS-Tricks | 168 | 156 (–7.5%) | 153 (–9.1%) | 155 (–8%) | 153 (–8.8%) | 153 (–9%) | 155 (–8.1%) |
| DeepSeek | 105 | 104 (–0.7%) | 98 (–7.1%) | 104 (–1.1%) | 104 (–1.4%) | 104 (–1.2%) | 104 (–1.1%) |
| DIN | 253 | 182 (–28.2%) | 176 (–30.6%) | 183 (–27.7%) | 182 (–28%) | 180 (–29%) | 183 (–27.8%) |
| DLR | 547 | 544 (–0.6%) | 541 (–1%) | n/a | 543 (–0.8%) | 542 (–1%) | 544 (–0.5%) |
| ECMAScript | 7237 | 6880 (–4.9%) | 6645 (–8.2%) | n/a | 6757 (–6.6%) | 6780 (–6.3%) | 6810 (–5.9%) |
| EDRi | 84 | 77 (–7.6%) | 77 (–8.2%) | 78 (–6.6%) | 77 (–7.5%) | 77 (–8.1%) | 78 (–6.7%) |
| EFF | 55 | 50 (–8%) | 48 (–12.5%) | 50 (–7.7%) | 49 (–9.9%) | 48 (–11.4%) | 49 (–9.6%) |
| European Alternatives | 49 | 33 (–33.1%) | 33 (–33.9%) | 33 (–32.9%) | 33 (–33.1%) | 33 (–33.7%) | 33 (–33.1%) |
| FAZ | 1389 | 1347 (–3%) | 1329 (–4.3%) | n/a | 1344 (–3.2%) | 1335 (–3.8%) | 1341 (–3.4%) |
| French Tech | 154 | 134 (–12.9%) | 133 (–13.9%) | 134 (–13%) | 134 (–13.2%) | 133 (–13.9%) | 134 (–13.1%) |
| Front-End Social | 36 | 34 (–3.7%) | 34 (–5.6%) | 35 (–3.1%) | 34 (–5.5%) | 34 (–5.6%) | 35 (–3.1%) |
| Frontend Dogma | 221 | 229 (+3.6%) | 221 (0%) | 220 (–0.2%) | 234 (+6%) | 220 (0%) | 239 (+8.3%) |
| 79 | 124 (+57.6%) | 78 (–0.6%) | 79 (–0.3%) | 78 (–0.8%) | 79 (–0.5%) | 79 (–0.3%) | |
| Ground News | 1804 | 1780 (–1.3%) | 1741 (–3.5%) | n/a | 1787 (–0.9%) | 1779 (–1.4%) | 1790 (–0.8%) |
| HTML 3.2 | 123 | 119 (–3%) | 119 (–3%) | 121 (–1.2%) | 124 (+0.9%) | 119 (–3.2%) | 123 (+0.5%) |
| HTML Living Standard | 149 | 152 (+1.8%) | 148 (–0.6%) | 149 (–0.2%) | 153 (+2.6%) | 149 (–0.3%) | 155 (+3.8%) |
| IETF | 83 | 34 (–58.7%) | 32 (–61.2%) | 35 (–58.2%) | 34 (–59.3%) | 34 (–59.8%) | 34 (–58.7%) |
| Igalia | 49 | 37 (–24.1%) | 34 (–29.4%) | 37 (–25.1%) | 36 (–25.6%) | 36 (–26%) | 36 (–25.5%) |
| Ladybird | 24 | 23 (–4.6%) | 23 (–7.3%) | 23 (–5.5%) | 23 (–6.1%) | 23 (–6.6%) | 23 (–5.6%) |
| Leanpub | 338 | 334 (–1.3%) | 325 (–3.8%) | n/a | 333 (–1.4%) | 331 (–2.1%) | 332 (–1.8%) |
| Legge Stanca | 17 | 12 (–28.5%) | 12 (–30.4%) | 12 (–27.3%) | 12 (–29.7%) | 12 (–30.2%) | 12 (–27.5%) |
| Mastodon | 34 | 33 (–3.5%) | 32 (–5.3%) | 33 (–2.9%) | 32 (–5.2%) | 32 (–5.3%) | 33 (–3%) |
| MDN | 117 | 71 (–39.2%) | 68 (–41.7%) | 73 (–37.8%) | 73 (–38%) | 70 (–40.4%) | 72 (–38.2%) |
| Mistral AI | 350 | 341 (–2.5%) | 339 (–3%) | n/a | 345 (–1.3%) | 341 (–2.6%) | 346 (–1.1%) |
| Mondoweiss | 400 | 396 (–1.2%) | 381 (–4.9%) | n/a | 385 (–3.9%) | 384 (–4.2%) | 387 (–3.4%) |
| Mozilla | 47 | 37 (–21%) | 35 (–25.9%) | 37 (–22.3%) | 36 (–23.9%) | 35 (–26.1%) | 36 (–23.1%) |
| Nielsen Norman Group | 100 | 84 (–16.2%) | 83 (–17.3%) | 84 (–15.9%) | 85 (–15.5%) | 83 (–17%) | 85 (–15.5%) |
| Opera | 231 | 178 (–22.9%) | 173 (–25.1%) | 176 (–23.8%) | 177 (–23.5%) | 175 (–24.4%) | 177 (–23.6%) |
| OSCE | 177 | 149 (–15.7%) | 147 (–16.9%) | 149 (–15.7%) | 150 (–15.5%) | 147 (–17%) | 150 (–15.5%) |
| Scrum Guide | 34 | 31 (–8.9%) | 30 (–10.7%) | 32 (–7.3%) | 31 (–7.9%) | 31 (–10.1%) | 31 (–7.8%) |
| SELFHTML | 21 | 20 (–7.5%) | 18 (–17.3%) | 18 (–13.6%) | 18 (–14.4%) | 18 (–16.7%) | 18 (–14.1%) |
| SitePoint | 233 | 230 (–1.3%) | 229 (–1.5%) | 231 (–0.7%) | 231 (–0.9%) | 230 (–1.1%) | 231 (–0.7%) |
| Smashing Magazine | 283 | 283 (+0.2%) | 281 (–0.6%) | 283 (–0.1%) | 282 (–0.2%) | 281 (–0.4%) | 283 (+0%) |
| Startup-Verband | 46 | 34 (–26.1%) | 33 (–29%) | 34 (–26.5%) | 34 (–26.9%) | 33 (–27.9%) | 34 (–26.2%) |
| TAZ | 413 | 389 (–5.6%) | 370 (–10.4%) | n/a | 380 (–7.9%) | 379 (–8.1%) | 382 (–7.4%) |
| TetraLogical | 61 | 55 (–10%) | 54 (–10.3%) | 55 (–9.7%) | 55 (–9.7%) | 54 (–10.2%) | 55 (–9.7%) |
| TPGi | 181 | 166 (–8.2%) | 163 (–9.7%) | 166 (–8.3%) | 164 (–9.2%) | 163 (–9.4%) | 165 (–8.3%) |
| United Nations | 152 | 131 (–13.6%) | 127 (–16.7%) | 131 (–13.7%) | 130 (–14.5%) | 129 (–15.2%) | 131 (–13.9%) |
| UX Collective | 96 | 137 (+42.6%) | 94 (–2.6%) | 95 (–0.8%) | 95 (–1.2%) | 95 (–1.4%) | 95 (–0.9%) |
| Vivaldi | 93 | 85 (–8.6%) | 84 (–10.5%) | 85 (–9.2%) | 85 (–9.5%) | 84 (–10.5%) | 85 (–9.2%) |
| W3C | 51 | 41 (–18.7%) | 40 (–20.7%) | 41 (–19%) | 41 (–19.4%) | 40 (–20.3%) | 41 (–18.9%) |
| WordPress Blog | 206 | 191 (–7.4%) | 188 (–9%) | 192 (–6.8%) | 191 (–7.4%) | 189 (–8.3%) | 193 (–6.6%) |
| Sites processed (of sites overall) | 48/48 | 48/48 | 38/48 | 48/48 | 48/48 | 48/48 | |
| Average processing time | 30 ms | 43 ms | 773 ms | 35 ms | 8 ms | 189 ms | |
| Average result (KB) | 374 | 355 (–5.1%) | 344 (–8.1%) | 363 (–2.9%) | 350 (–6.4%) | 349 (–6.7%) | 352 (–5.9%) |
2. Maximum Minification Compared
| Site | Original Size (KB) | @swc/html | HTML Minifier Next | htmlcompressor.com | htmlnano | minify-html | minimize |
|---|---|---|---|---|---|---|---|
| Minifier Test | 31 | 24 (–23.3%) | 23 (–25.5%) | 24 (–22.9%) | 23 (–26.5%) | 23 (–25.3%) | 26 (–16.3%) |
| A List Apart | 64 | 58 (–9.6%) | 54 (–15.1%) | 58 (–10%) | 40 (–37%) | 56 (–12%) | 59 (–7.3%) |
| Apple | 244 | 232 (–5.2%) | 215 (–11.9%) | 230 (–5.9%) | 220 (–10.1%) | 227 (–7%) | 230 (–6.1%) |
| BBC | 701 | 660 (–5.9%) | 645 (–8%) | n/a | 656 (–6.5%) | 655 (–6.7%) | 696 (–0.8%) |
| Bun | 461 | 435 (–5.7%) | 420 (–8.8%) | n/a | 374 (–18.9%) | 436 (–5.3%) | 455 (–1.3%) |
| CERN | 151 | 93 (–38.3%) | 81 (–46.5%) | 96 (–36.7%) | 90 (–40.3%) | 91 (–39.9%) | 93 (–38.5%) |
| CSS-Tricks | 168 | 145 (–13.5%) | 134 (–20.4%) | 147 (–12.4%) | 114 (–32.4%) | 145 (–13.5%) | 155 (–8.1%) |
| DeepSeek | 105 | 100 (–5.1%) | 84 (–19.9%) | 100 (–5.1%) | 90 (–14.4%) | 99 (–5.4%) | 104 (–1.1%) |
| DIN | 253 | 175 (–30.8%) | 164 (–35.3%) | 176 (–30.5%) | 136 (–46.3%) | 174 (–31.1%) | 183 (–27.8%) |
| DLR | 547 | 514 (–6%) | 504 (–7.8%) | n/a | 500 (–8.7%) | 506 (–7.4%) | 544 (–0.5%) |
| ECMAScript | 7237 | 6880 (–4.9%) | 6644 (–8.2%) | n/a | 6756 (–6.6%) | 6780 (–6.3%) | 6810 (–5.9%) |
| EDRi | 84 | 74 (–11.1%) | 70 (–15.8%) | 76 (–9.5%) | 55 (–34.6%) | 74 (–11.3%) | 78 (–6.7%) |
| EFF | 55 | 49 (–10.7%) | 44 (–18.6%) | 49 (–9.9%) | 47 (–14.1%) | 48 (–12.4%) | 49 (–9.6%) |
| European Alternatives | 49 | 33 (–33.2%) | 31 (–37.7%) | 33 (–33%) | 31 (–37%) | 33 (–33.8%) | 33 (–33.1%) |
| FAZ | 1389 | 1340 (–3.5%) | 1284 (–7.5%) | n/a | 1213 (–12.7%) | 1329 (–4.3%) | 1341 (–3.4%) |
| French Tech | 154 | 128 (–17%) | 124 (–20%) | 129 (–16.4%) | 53 (–65.5%) | 127 (–17.5%) | 134 (–13.1%) |
| Front-End Social | 36 | 34 (–3.7%) | 31 (–13.9%) | 35 (–3.1%) | 31 (–13.8%) | 34 (–5.6%) | 35 (–3.1%) |
| Frontend Dogma | 221 | 229 (+3.6%) | 213 (–3.4%) | 220 (–0.2%) | 225 (+2.2%) | 220 (0%) | 239 (+8.3%) |
| 79 | 75 (–5%) | 74 (–5.7%) | 78 (–0.8%) | 63 (–19.9%) | 76 (–3.7%) | 79 (–0.3%) | |
| Ground News | 1804 | 1689 (–6.3%) | 1615 (–10.5%) | n/a | 1663 (–7.8%) | 1687 (–6.5%) | 1790 (–0.8%) |
| HTML 3.2 | 123 | 119 (–3.1%) | 118 (–3.4%) | 121 (–1.3%) | 123 (+0.7%) | 119 (–3.3%) | 123 (+0.5%) |
| HTML Living Standard | 149 | 152 (+1.8%) | 148 (–0.7%) | 149 (–0.3%) | 153 (+2.5%) | 149 (–0.3%) | 155 (+3.8%) |
| IETF | 83 | 34 (–59%) | 32 (–62%) | 35 (–58.3%) | 33 (–60%) | 33 (–59.9%) | 34 (–58.7%) |
| Igalia | 49 | 36 (–25.4%) | 33 (–31.8%) | 36 (–26%) | 35 (–28.2%) | 35 (–27.4%) | 36 (–25.5%) |
| Ladybird | 24 | 23 (–4.6%) | 22 (–8.7%) | 23 (–5.5%) | 23 (–7.7%) | 23 (–6.6%) | 23 (–5.6%) |
| Leanpub | 338 | 323 (–4.3%) | 306 (–9.5%) | n/a | 314 (–7%) | 321 (–5.2%) | 332 (–1.8%) |
| Legge Stanca | 17 | 10 (–43.8%) | 9 (–46.5%) | 10 (–42.7%) | 9 (–46.5%) | 10 (–40.5%) | 12 (–27.5%) |
| Mastodon | 34 | 32 (–4.9%) | 29 (–15.2%) | 33 (–3.3%) | 29 (–15.1%) | 32 (–5.7%) | 33 (–3%) |
| MDN | 117 | 71 (–39.3%) | 67 (–42.8%) | 73 (–37.8%) | 55 (–52.9%) | 70 (–40.5%) | 72 (–38.2%) |
| Mistral AI | 350 | 318 (–9.2%) | 302 (–13.7%) | n/a | 309 (–11.6%) | 317 (–9.5%) | 346 (–1.1%) |
| Mondoweiss | 400 | 377 (–5.8%) | 364 (–9%) | n/a | 358 (–10.7%) | 373 (–6.9%) | 387 (–3.4%) |
| Mozilla | 47 | 37 (–21%) | 32 (–31.7%) | 37 (–22.3%) | 33 (–29.6%) | 35 (–26.1%) | 36 (–23.1%) |
| Nielsen Norman Group | 100 | 83 (–17%) | 59 (–41.2%) | 84 (–16.5%) | 60 (–40.5%) | 83 (–17.5%) | 85 (–15.5%) |
| Opera | 231 | 173 (–25%) | 147 (–36.6%) | 176 (–24%) | 109 (–52.7%) | 170 (–26.3%) | 177 (–23.6%) |
| OSCE | 177 | 149 (–15.7%) | 140 (–21%) | 149 (–15.7%) | 141 (–20.4%) | 147 (–17.2%) | 150 (–15.5%) |
| Scrum Guide | 34 | 31 (–9%) | 30 (–10.9%) | 32 (–7.3%) | 31 (–8.3%) | 31 (–10.1%) | 31 (–7.8%) |
| SELFHTML | 21 | 18 (–14.1%) | 17 (–19%) | 18 (–14.3%) | 18 (–15.8%) | 18 (–17.5%) | 18 (–14.1%) |
| SitePoint | 233 | 221 (–5%) | 208 (–10.6%) | 231 (–1%) | 210 (–10%) | 222 (–4.8%) | 231 (–0.7%) |
| Smashing Magazine | 283 | 282 (–0.3%) | 279 (–1.4%) | 282 (–0.1%) | 269 (–5%) | 280 (–0.9%) | 283 (+0%) |
| Startup-Verband | 46 | 34 (–26.2%) | 32 (–30.6%) | 34 (–26.6%) | 33 (–28.6%) | 33 (–28.1%) | 34 (–26.2%) |
| TAZ | 413 | 370 (–10.5%) | 345 (–16.5%) | n/a | 360 (–12.8%) | 369 (–10.6%) | 382 (–7.4%) |
| TetraLogical | 61 | 54 (–10.2%) | 50 (–16.8%) | 55 (–9.9%) | 51 (–16.4%) | 54 (–10.4%) | 55 (–9.7%) |
| TPGi | 181 | 135 (–24.9%) | 132 (–26.6%) | 142 (–21.6%) | 117 (–35.4%) | 141 (–21.9%) | 165 (–8.3%) |
| United Nations | 152 | 128 (–16.1%) | 113 (–25.5%) | 124 (–18.5%) | 85 (–44.1%) | 125 (–17.7%) | 131 (–13.9%) |
| UX Collective | 96 | 89 (–7.1%) | 87 (–9.4%) | 91 (–5.1%) | 88 (–8.8%) | 89 (–7.7%) | 95 (–0.9%) |
| Vivaldi | 93 | 82 (–11.9%) | 75 (–19.7%) | 83 (–11%) | 70 (–25.2%) | 82 (–12.5%) | 85 (–9.2%) |
| W3C | 51 | 39 (–22.4%) | 36 (–28.7%) | 39 (–22.8%) | 37 (–27.3%) | 38 (–24.1%) | 41 (–18.9%) |
| WordPress Blog | 206 | 169 (–17.9%) | 160 (–22.5%) | 179 (–13.2%) | 141 (–31.7%) | 177 (–14.4%) | 193 (–6.6%) |
| Sites processed (of sites overall) | 48/48 | 48/48 | 38/48 | 48/48 | 48/48 | 48/48 | |
| Average processing time | 35 ms | 65 ms | 1323 ms | 140 ms | 11 ms | 190 ms | |
| Average result (KB) | 374 | 345 (–7.7%) | 330 (–11.8%) | 361 (–3.5%) | 327 (–12.7%) | 342 (–8.6%) | 352 (–5.9%) |
Benchmarks last updated: May 1, 2026
Notes
- Minifiers:
- htmlcompressor.com incorrectly converts no-break spaces to spaces which can give an impression of greater effectiveness (last confirmed Apr 4, 2026).
- minify-html “invalidates” markup, notably by removing spaces in doctypes (
<!doctypehtml>) (last confirmed Apr 4, 2026). - Minimize only minifies HTML.
- HTML Minifier Terser is currently not included due to issues around whitespace collapsing and removal of code using modern CSS features, issues which appeared to distort the data.
- Calculation:
- Calculations are done based on bytes, which are used to compare effectiveness.
- Failed sites are not excluded from the calculation for the average result, but counted as unminified. This avoids test failures advantaging the respective minifier.
- Benchmarks are currently run manually (on a 2024 Apple Mac Mini) but may be automated in the future.