Minifier Benchmarks
August 7, 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 (–19.1%) | 26 (–16.3%) |
| A List Apart | 63 | 59 (–5.8%) | 57 (–8.4%) | 58 (–7.2%) | 58 (–7.7%) | 58 (–8.1%) | 58 (–7.3%) |
| Apple | 251 | 238 (–5.2%) | 232 (–7.7%) | 236 (–5.9%) | 235 (–6.4%) | 234 (–6.7%) | 236 (–6.1%) |
| BBC | 651 | 647 (–0.7%) | 642 (–1.5%) | n/a | 644 (–1%) | 644 (–1.2%) | 646 (–0.8%) |
| Bun | 283 | 272 (–3.8%) | 264 (–6.8%) | 278 (–1.7%) | 275 (–2.6%) | 274 (–3.1%) | 276 (–2.4%) |
| CERN | 290 | 279 (–4%) | 271 (–6.8%) | 278 (–4.2%) | 278 (–4.3%) | 277 (–4.7%) | 278 (–4.3%) |
| CSS-Tricks | 170 | 157 (–7.5%) | 154 (–9.3%) | 155 (–8.5%) | 154 (–9%) | 155 (–8.9%) | 155 (–8.5%) |
| DeepSeek | 98 | 97 (–0.8%) | 91 (–7.5%) | 97 (–1.2%) | 97 (–1.5%) | 97 (–1.3%) | 97 (–1.2%) |
| DIN | 253 | 182 (–28%) | 176 (–30.4%) | 183 (–27.6%) | 182 (–28.1%) | 180 (–28.7%) | 183 (–27.7%) |
| DLR | 545 | 541 (–0.6%) | 539 (–1%) | n/a | 540 (–0.8%) | 540 (–0.9%) | 542 (–0.5%) |
| ECMAScript | 7413 | 7046 (–4.9%) | 6805 (–8.2%) | n/a | 6921 (–6.6%) | 6950 (–6.2%) | 6974 (–5.9%) |
| EDRi | 84 | 78 (–7.7%) | 77 (–8.2%) | 79 (–6.6%) | 78 (–7.6%) | 78 (–7.9%) | 79 (–6.7%) |
| EFF | 54 | 50 (–7.9%) | 47 (–12.4%) | 50 (–7.7%) | 48 (–9.9%) | 48 (–11.1%) | 49 (–9.6%) |
| European Alternatives | 49 | 33 (–33.1%) | 33 (–33.9%) | 33 (–32.9%) | 33 (–33.1%) | 33 (–33.5%) | 33 (–33.1%) |
| FAZ | 1525 | 1474 (–3.4%) | 1401 (–8.2%) | n/a | 1472 (–3.5%) | 1469 (–3.7%) | 1468 (–3.7%) |
| French Tech | 171 | 136 (–20.4%) | 134 (–21.2%) | 136 (–20.1%) | 136 (–20.4%) | 135 (–20.9%) | 136 (–20.2%) |
| Front-End Social | 43 | 41 (–4.1%) | 40 (–6.4%) | 42 (–3.4%) | 40 (–6.3%) | 40 (–6.3%) | 42 (–3.5%) |
| Frontend Dogma | 217 | 225 (+3.6%) | 217 (0%) | 217 (–0.2%) | 231 (+6.2%) | 217 (0%) | 236 (+8.5%) |
| 82 | 128 (+56.6%) | 81 (–0.6%) | 81 (–0.3%) | 81 (–0.8%) | 81 (–0.5%) | 81 (–0.3%) | |
| Ground News | 1514 | 1490 (–1.6%) | 1450 (–4.2%) | n/a | 1495 (–1.3%) | 1491 (–1.6%) | 1500 (–0.9%) |
| HTML 3.2 | 123 | 119 (–3%) | 119 (–3%) | 121 (–1.2%) | 124 (+0.8%) | 119 (–2.7%) | 123 (+0.5%) |
| HTML Living Standard | 151 | 154 (+1.8%) | 150 (–0.6%) | 151 (–0.2%) | 155 (+2.6%) | 151 (–0.2%) | 157 (+3.8%) |
| IETF | 82 | 34 (–58.5%) | 32 (–61%) | 35 (–58%) | 34 (–59.1%) | 33 (–59.5%) | 34 (–58.5%) |
| Igalia | 44 | 35 (–21.9%) | 32 (–27.6%) | 34 (–22.9%) | 34 (–23.4%) | 34 (–23.7%) | 34 (–23.3%) |
| Ladybird | 29 | 28 (–3.9%) | 27 (–6.4%) | 28 (–5%) | 28 (–5.4%) | 28 (–5.7%) | 28 (–5%) |
| Leanpub | 363 | 359 (–1%) | 353 (–3%) | n/a | 359 (–1.2%) | 357 (–1.8%) | 357 (–1.7%) |
| Legge Stanca | 17 | 12 (–28.5%) | 12 (–30.4%) | 12 (–27.3%) | 12 (–30%) | 12 (–30.1%) | 12 (–27.5%) |
| Mastodon | 54 | 51 (–4.6%) | 50 (–7.3%) | 52 (–3.8%) | 50 (–7.2%) | 50 (–7.2%) | 52 (–3.9%) |
| MDN | 117 | 70 (–40.2%) | 67 (–42.7%) | 72 (–38.8%) | 71 (–39.5%) | 69 (–41.2%) | 71 (–39.2%) |
| Mistral AI | 425 | 412 (–3.2%) | 341 (–19.9%) | n/a | 424 (–0.3%) | 416 (–2.2%) | 425 (+0%) |
| Mondoweiss | 354 | 351 (–1.1%) | 335 (–5.4%) | n/a | 339 (–4.2%) | 339 (–4.3%) | 341 (–3.9%) |
| Mozilla | 48 | 38 (–21%) | 35 (–25.8%) | 37 (–22.2%) | 36 (–23.8%) | 35 (–25.6%) | 37 (–23%) |
| Nielsen Norman Group | 102 | 86 (–16.3%) | 85 (–17.3%) | 86 (–16%) | 86 (–15.6%) | 85 (–16.8%) | 86 (–15.6%) |
| Opera | 183 | 134 (–26.6%) | 131 (–28.4%) | 134 (–26.9%) | 133 (–27.2%) | 133 (–27.3%) | 133 (–27.2%) |
| OSCE | 173 | 145 (–16%) | 143 (–17.2%) | 145 (–15.9%) | 146 (–15.7%) | 144 (–16.8%) | 146 (–15.7%) |
| Scrum Guide | 34 | 31 (–8.9%) | 30 (–10.7%) | 32 (–7.3%) | 31 (–7.9%) | 31 (–10%) | 31 (–7.8%) |
| SELFHTML | 21 | 19 (–7.6%) | 17 (–17.3%) | 18 (–13.5%) | 18 (–14.5%) | 18 (–16.4%) | 18 (–14%) |
| SitePoint | 237 | 234 (–1.3%) | 233 (–1.6%) | 235 (–0.7%) | 235 (–0.9%) | 235 (–0.9%) | 235 (–0.7%) |
| Smashing Magazine | 296 | 297 (+0.2%) | 295 (–0.5%) | n/a | 296 (–0.2%) | 295 (–0.4%) | 296 (0%) |
| Startup-Verband | 52 | 38 (–26.3%) | 36 (–29.3%) | 38 (–27.2%) | 37 (–27.7%) | 37 (–28.2%) | 38 (–27.2%) |
| TAZ | 411 | 388 (–5.7%) | 368 (–10.5%) | n/a | 380 (–7.6%) | 380 (–7.5%) | 382 (–7.1%) |
| TetraLogical | 60 | 54 (–10.1%) | 54 (–10.5%) | 54 (–9.8%) | 54 (–9.8%) | 54 (–10.1%) | 54 (–9.8%) |
| TPGi | 188 | 171 (–9%) | 169 (–10.5%) | 173 (–8.3%) | 170 (–9.9%) | 170 (–9.9%) | 173 (–8.3%) |
| United Nations | 154 | 133 (–13.5%) | 128 (–16.6%) | 133 (–13.6%) | 131 (–14.5%) | 130 (–15.1%) | 132 (–13.9%) |
| UX Collective | 118 | 163 (+37.8%) | 116 (–2.3%) | 118 (–0.6%) | 117 (–1.1%) | 117 (–1.1%) | 116 (–1.7%) |
| Vivaldi | 91 | 83 (–8.8%) | 82 (–10.8%) | 83 (–9.5%) | 82 (–9.8%) | 82 (–10.5%) | 83 (–9.4%) |
| W3C | 50 | 41 (–18.8%) | 40 (–20.8%) | 41 (–19.1%) | 40 (–19.5%) | 40 (–20.3%) | 41 (–19%) |
| WordPress Blog | 207 | 192 (–7.4%) | 189 (–8.9%) | 193 (–6.7%) | 192 (–7.5%) | 191 (–8%) | 194 (–6.5%) |
| Sites processed (of sites overall) | 48/48 | 48/48 | 38/48 | 48/48 | 48/48 | 48/48 | |
| Average processing time | 34 ms | 43 ms | 853 ms | 41 ms | 8 ms | 196 ms | |
| Average result (KB) | 374 | 356 (–5%) | 342 (–8.7%) | 364 (–2.8%) | 351 (–6.3%) | 350 (–6.5%) | 353 (–5.8%) |
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 (–25.2%) | 26 (–16.3%) |
| A List Apart | 63 | 57 (–9.1%) | 53 (–14.7%) | 56 (–9.9%) | 39 (–37.3%) | 55 (–11.4%) | 58 (–7.3%) |
| Apple | 251 | 238 (–5.1%) | 222 (–11.6%) | 236 (–5.9%) | 226 (–10.1%) | 234 (–6.8%) | 236 (–6.1%) |
| BBC | 651 | 613 (–5.8%) | 600 (–7.9%) | n/a | 607 (–6.7%) | 610 (–6.3%) | 646 (–0.8%) |
| Bun | 283 | 272 (–3.9%) | 259 (–8.3%) | 278 (–1.7%) | 271 (–4%) | 274 (–3.2%) | 276 (–2.4%) |
| CERN | 290 | 263 (–9.4%) | 248 (–14.5%) | 268 (–7.7%) | 216 (–25.6%) | 262 (–9.8%) | 278 (–4.3%) |
| CSS-Tricks | 170 | 148 (–12.7%) | 136 (–19.9%) | 149 (–12.2%) | 115 (–32.1%) | 148 (–13%) | 155 (–8.5%) |
| DeepSeek | 98 | 95 (–3.2%) | 71 (–27.4%) | 95 (–3.4%) | 77 (–21.6%) | 95 (–3.6%) | 97 (–1.2%) |
| DIN | 253 | 176 (–30.5%) | 164 (–35.1%) | 176 (–30.3%) | 136 (–46.3%) | 175 (–30.8%) | 183 (–27.7%) |
| DLR | 545 | 512 (–6%) | 502 (–7.8%) | n/a | 497 (–8.7%) | 505 (–7.4%) | 542 (–0.5%) |
| ECMAScript | 7413 | 7046 (–4.9%) | 6804 (–8.2%) | n/a | 6920 (–6.6%) | 6950 (–6.2%) | 6974 (–5.9%) |
| EDRi | 84 | 75 (–11.2%) | 71 (–16%) | 76 (–9.6%) | 55 (–34.7%) | 75 (–11.1%) | 79 (–6.7%) |
| EFF | 54 | 48 (–10.7%) | 44 (–18.7%) | 48 (–10%) | 46 (–14.3%) | 47 (–12.1%) | 49 (–9.6%) |
| European Alternatives | 49 | 33 (–33.2%) | 31 (–37.7%) | 33 (–33%) | 31 (–37%) | 33 (–33.6%) | 33 (–33.1%) |
| FAZ | 1525 | 1407 (–7.7%) | 1347 (–11.7%) | n/a | 1272 (–16.6%) | 1461 (–4.2%) | 1468 (–3.7%) |
| French Tech | 171 | 129 (–24.2%) | 124 (–27.2%) | 130 (–23.6%) | 56 (–66.9%) | 129 (–24.6%) | 136 (–20.2%) |
| Front-End Social | 43 | 41 (–5.2%) | 37 (–14.4%) | 41 (–3.7%) | 37 (–14.2%) | 40 (–6.6%) | 42 (–3.5%) |
| Frontend Dogma | 217 | 225 (+3.6%) | 210 (–3.3%) | 217 (–0.2%) | 222 (+2.4%) | 217 (0%) | 236 (+8.5%) |
| 82 | 78 (–4.5%) | 77 (–5.2%) | 81 (–0.8%) | 66 (–19.3%) | 79 (–3.5%) | 81 (–0.3%) | |
| Ground News | 1514 | 1424 (–6%) | 1348 (–11%) | n/a | 1395 (–7.9%) | 1424 (–6%) | 1500 (–0.9%) |
| HTML 3.2 | 123 | 119 (–3.1%) | 118 (–3.4%) | 121 (–1.3%) | 123 (+0.6%) | 119 (–2.8%) | 123 (+0.5%) |
| HTML Living Standard | 151 | 154 (+1.8%) | 150 (–0.7%) | 151 (–0.3%) | 155 (+2.5%) | 151 (–0.2%) | 157 (+3.8%) |
| IETF | 82 | 34 (–58.8%) | 31 (–61.8%) | 34 (–58.1%) | 33 (–59.9%) | 33 (–59.6%) | 34 (–58.5%) |
| Igalia | 44 | 34 (–23.4%) | 31 (–30.1%) | 34 (–23.9%) | 33 (–26.1%) | 33 (–25.3%) | 34 (–23.3%) |
| Ladybird | 29 | 28 (–3.9%) | 27 (–7.6%) | 28 (–5%) | 25 (–14.2%) | 28 (–5.7%) | 28 (–5%) |
| Leanpub | 363 | 347 (–4.4%) | 331 (–9%) | n/a | 338 (–7.1%) | 344 (–5.2%) | 357 (–1.7%) |
| Legge Stanca | 17 | 10 (–43.8%) | 9 (–46.5%) | 10 (–42.7%) | 9 (–46.7%) | 10 (–40.3%) | 12 (–27.5%) |
| Mastodon | 54 | 51 (–5.6%) | 46 (–13.9%) | 52 (–4.1%) | 46 (–13.8%) | 50 (–7.6%) | 52 (–3.9%) |
| MDN | 117 | 70 (–40.3%) | 66 (–43.8%) | 71 (–38.8%) | 54 (–53.9%) | 69 (–41.3%) | 71 (–39.2%) |
| Mistral AI | 425 | 412 (–3.2%) | 259 (–39.2%) | n/a | 333 (–21.7%) | 416 (–2.3%) | 425 (+0%) |
| Mondoweiss | 354 | 334 (–5.7%) | 321 (–9.4%) | n/a | 315 (–11.1%) | 329 (–7.2%) | 341 (–3.9%) |
| Mozilla | 48 | 38 (–21%) | 32 (–31.6%) | 37 (–22.2%) | 34 (–29.4%) | 35 (–25.6%) | 37 (–23%) |
| Nielsen Norman Group | 102 | 85 (–17.1%) | 60 (–41.8%) | 85 (–16.6%) | 60 (–41.1%) | 85 (–17.4%) | 86 (–15.6%) |
| Opera | 183 | 130 (–29.2%) | 122 (–33.4%) | 133 (–27.2%) | 84 (–53.9%) | 129 (–29.7%) | 133 (–27.2%) |
| OSCE | 173 | 145 (–16%) | 136 (–21.3%) | 145 (–15.9%) | 137 (–20.7%) | 144 (–16.9%) | 146 (–15.7%) |
| Scrum Guide | 34 | 31 (–9%) | 30 (–10.9%) | 32 (–7.3%) | 31 (–8.3%) | 31 (–10%) | 31 (–7.8%) |
| SELFHTML | 21 | 18 (–14.2%) | 17 (–19%) | 18 (–14.3%) | 18 (–15.9%) | 17 (–17.2%) | 18 (–14%) |
| SitePoint | 237 | 225 (–5%) | 212 (–10.5%) | 227 (–4.1%) | 213 (–9.9%) | 226 (–4.6%) | 235 (–0.7%) |
| Smashing Magazine | 296 | 296 (–0.3%) | 293 (–1.3%) | n/a | 279 (–5.7%) | 294 (–0.8%) | 296 (0%) |
| Startup-Verband | 52 | 38 (–26.4%) | 35 (–31.2%) | 37 (–27.3%) | 36 (–29.6%) | 37 (–28.4%) | 38 (–27.2%) |
| TAZ | 411 | 370 (–10.1%) | 344 (–16.2%) | n/a | 361 (–12.1%) | 371 (–9.6%) | 382 (–7.1%) |
| TetraLogical | 60 | 54 (–10.2%) | 50 (–17%) | 54 (–9.9%) | 50 (–16.3%) | 54 (–10.2%) | 54 (–9.8%) |
| TPGi | 188 | 145 (–23.2%) | 141 (–24.9%) | 152 (–19.1%) | 125 (–33.4%) | 147 (–21.9%) | 173 (–8.3%) |
| United Nations | 154 | 129 (–16.1%) | 115 (–25.4%) | 125 (–18.4%) | 86 (–43.9%) | 127 (–17.5%) | 132 (–13.9%) |
| UX Collective | 118 | 110 (–7.3%) | 103 (–13.3%) | 117 (–1.4%) | 103 (–12.9%) | 109 (–7.8%) | 116 (–1.7%) |
| Vivaldi | 91 | 80 (–12%) | 73 (–20%) | 81 (–11.5%) | 64 (–29.8%) | 80 (–12.8%) | 83 (–9.4%) |
| W3C | 50 | 39 (–22.6%) | 36 (–28.9%) | 39 (–23%) | 36 (–27.5%) | 38 (–24.2%) | 41 (–19%) |
| WordPress Blog | 207 | 170 (–18%) | 161 (–22.5%) | 180 (–13.2%) | 142 (–31.4%) | 178 (–14.2%) | 194 (–6.5%) |
| Sites processed (of sites overall) | 48/48 | 48/48 | 38/48 | 48/48 | 48/48 | 48/48 | |
| Average processing time | 34 ms | 81 ms | 1303 ms | 156 ms | 11 ms | 199 ms | |
| Average result (KB) | 374 | 346 (–7.7%) | 328 (–12.5%) | 362 (–3.3%) | 326 (–13%) | 344 (–8.1%) | 353 (–5.8%) |
Benchmarks last updated: Aug 7, 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).
- 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.