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minification benchmarks

What's the best JavaScript minifier?

This project benchmarks the following minifiers:

Minifier Version Release date ↓
oxc-minify 0.61.1 2025-03-21
@tdewolff/minify 2.22.3 2025-03-20
@swc/core 1.11.11 2025-03-17
bun 1.2.5 2025-03-11
esbuild 0.25.1 2025-03-10
terser 5.39.0 2025-02-13
uglify-js 3.19.3 2024-08-29
google-closure-compiler 20240317.0.0 2024-03-19
babel-minify 0.5.2 2022-05-06
tedivm/jshrink 1.7.0

Benchmarks last updated on Mar 21, 2025.


🙋‍♂️ Why?

  1. To help you pick a minifier that fits your needs
  2. To promote JS minifiers and document their performances
  3. To encourage healthy competition and improvement amongst minifiers

👟 Methodology

  • Each minifier is executed in its own process with a 10s timeout
  • Artifact integrity is verified by a test before and after minification
  • Each minifier is minimally configured (sourcemaps & comments disabled), comparing out-of-the-box experience
  • Minifier upgrade PRs are automated via WhiteSource Renovate
  • Benchmarks are updated on every PR via GitHub Actions
  • The raw benchmark data is available in /packages/data/data/data.json

⏱ Metrics

Minifiers are ranked by smallest minzipped size.

Minified size

Size of the minified output.

Minzipped size

Size of the minified output with Gzip compression.

For minifiers, this measures how compressable the output is.

For users, this measures network transfer size, which is usually the metric that matters most.

Time

How long minification took (average of 5 runs). Each time is annotated with a multiplier relative to the fastest minifier.

📋 Results

Tip

What's the verdict? ⚔️ See the Minifier showdown

---
config:
    xyChart:
        width: 720
        height: 360
        xAxis:
            labelPadding: 20
        yAxis:
            labelPadding: 10
---
xychart-beta
	title "react v17.0.2"
	x-axis ["Original",1,2,3,4,5,6,7,8,9,10,11,12]
	y-axis "Gzip size" 0 --> 19385
	bar [19385,8173,8177,8193,8265,8448,8493,8543,8628,8661,8668,8746,11040]
Loading
Artifact Original size Gzip size
react v17.0.2 (Source) 72.13 kB 19.39 kB
Minifier Minified size Minzipped size Time
1. @swc/core -68% 22.86 kB 🏆-58% 8.17 kB 6x 16 ms
2. uglify-js 🏆-69% 22.64 kB -58% 8.18 kB 201x 497 ms
3. google-closure-compiler -68% 22.83 kB -58% 8.19 kB 1242x 3,070 ms
4. terser -68% 23.07 kB -57% 8.27 kB 111x 275 ms
5. babel-minify -67% 23.60 kB -56% 8.45 kB 261x 647 ms
6. oxc-minify -67% 23.52 kB -56% 8.49 kB 1x 3 ms
7. esbuild -67% 23.70 kB -56% 8.54 kB 5x 12 ms
8. @tdewolff/minify -67% 23.49 kB -55% 8.63 kB 🏆 2 ms
9. bun -67% 23.99 kB -55% 8.66 kB 5x 15 ms
10. uglify-js (no compress) -65% 25.03 kB -55% 8.67 kB 36x 91 ms
11. terser (no compress) -65% 25.08 kB -55% 8.75 kB 47x 118 ms
12. tedivm/jshrink -43% 40.82 kB -43% 11.04 kB 49x 123 ms 
---
config:
    xyChart:
        width: 720
        height: 360
        xAxis:
            labelPadding: 20
        yAxis:
            labelPadding: 10
---
xychart-beta
	title "moment v2.29.1"
	x-axis ["Original",1,2,3,4,5,6,7,8,9,10,11,12]
	y-axis "Gzip size" 0 --> 36231
	bar [36231,18568,18690,18699,18910,19119,19260,19334,19482,19569,19683,19857,24998]
Loading
Artifact Original size Gzip size
moment v2.29.1 (Source) 173.90 kB 36.23 kB
Minifier Minified size Minzipped size Time
1. uglify-js 🏆-67% 57.73 kB 🏆-49% 18.57 kB 169x 1,149 ms
2. terser -66% 59.14 kB -48% 18.69 kB 98x 668 ms
3. @swc/core -66% 58.27 kB -48% 18.70 kB 6x 44 ms
4. google-closure-compiler -66% 58.27 kB -48% 18.91 kB 553x 3,753 ms
5. babel-minify -66% 59.70 kB -47% 19.12 kB 215x 1,465 ms
6. oxc-minify -66% 59.52 kB -47% 19.26 kB 1x 8 ms
7. esbuild -66% 59.82 kB -47% 19.33 kB 2x 18 ms
8. @tdewolff/minify -66% 59.87 kB -46% 19.48 kB 🏆 7 ms
9. uglify-js (no compress) -64% 62.50 kB -46% 19.57 kB 31x 215 ms
10. terser (no compress) -64% 63.15 kB -46% 19.68 kB 39x 270 ms
11. bun -64% 61.84 kB -45% 19.86 kB 2x 19 ms
12. tedivm/jshrink -44% 97.63 kB -31% 25.00 kB 41x 282 ms 
---
config:
    xyChart:
        width: 720
        height: 360
        xAxis:
            labelPadding: 20
        yAxis:
            labelPadding: 10
---
xychart-beta
	title "jquery v3.5.1"
	x-axis ["Original",1,2,3,4,5,6,7,8,9,10,11,12]
	y-axis "Gzip size" 0 --> 84498
	bar [84498,30881,30903,30912,30970,31446,31470,31621,31799,31954,32653,33086,40879]
Loading
Artifact Original size Gzip size
jquery v3.5.1 (Source) 287.63 kB 84.50 kB
Minifier Minified size Minzipped size Time
1. @swc/core -69% 89.18 kB 🏆-63% 30.88 kB 8x 66 ms
2. uglify-js 🏆-69% 88.45 kB -63% 30.90 kB 200x 1,593 ms
3. terser -69% 89.54 kB -63% 30.91 kB 111x 891 ms
4. oxc-minify -69% 89.33 kB -63% 30.97 kB 1x 13 ms
5. @tdewolff/minify -69% 89.68 kB -63% 31.45 kB 🏆 8 ms
6. uglify-js (no compress) -67% 94.08 kB -63% 31.47 kB 39x 314 ms
7. terser (no compress) -67% 94.55 kB -63% 31.62 kB 44x 353 ms
8. babel-minify -68% 92.10 kB -62% 31.80 kB 301x 2,398 ms
9. esbuild -69% 90.07 kB -62% 31.95 kB 4x 36 ms
10. bun -68% 92.55 kB -61% 32.65 kB 3x 29 ms
11. google-closure-compiler -68% 92.70 kB -61% 33.09 kB 509x 4,056 ms
12. tedivm/jshrink -50% 144.14 kB -52% 40.88 kB 45x 363 ms 
---
config:
    xyChart:
        width: 720
        height: 360
        xAxis:
            labelPadding: 20
        yAxis:
            labelPadding: 10
---
xychart-beta
	title "vue v2.6.12"
	x-axis ["Original",1,2,3,4,5,6,7,8,9,10,11,12]
	y-axis "Gzip size" 0 --> 89668
	bar [89668,42727,42919,43036,43370,43925,44230,44354,44368,44450,44679,45400,57169]
Loading
Artifact Original size Gzip size
vue v2.6.12 (Source) 342.15 kB 89.67 kB
Minifier Minified size Minzipped size Time
1. @swc/core -66% 115.74 kB 🏆-52% 42.73 kB 6x 92 ms
2. terser -66% 116.80 kB -52% 42.92 kB 81x 1,102 ms
3. uglify-js 🏆-67% 113.80 kB -52% 43.04 kB 162x 2,206 ms
4. oxc-minify -66% 117.25 kB -52% 43.37 kB 1x 16 ms
5. babel-minify -66% 117.90 kB -51% 43.93 kB 199x 2,696 ms
6. google-closure-compiler -66% 115.61 kB -51% 44.23 kB 345x 4,686 ms
7. @tdewolff/minify -66% 117.67 kB -51% 44.35 kB 🏆 14 ms
8. esbuild -65% 118.14 kB -51% 44.37 kB 3x 41 ms
9. uglify-js (no compress) -63% 126.14 kB -50% 44.45 kB 26x 364 ms
10. terser (no compress) -63% 126.58 kB -50% 44.68 kB 32x 443 ms
11. bun -64% 121.50 kB -49% 45.40 kB 2x 32 ms
12. tedivm/jshrink -42% 197.36 kB -36% 57.17 kB 35x 479 ms 
---
config:
    xyChart:
        width: 720
        height: 360
        xAxis:
            labelPadding: 20
        yAxis:
            labelPadding: 10
---
xychart-beta
	title "lodash v4.17.21"
	x-axis ["Original",1,2,3,4,5,6,7,8,9,10,11,12]
	y-axis "Gzip size" 0 --> 96690
	bar [96690,24686,24972,25186,25219,25503,25862,25979,26200,26221,26498,26655,36327]
Loading
Artifact Original size Gzip size
lodash v4.17.21 (Source) 544.09 kB 96.69 kB
Minifier Minified size Minzipped size Time
1. uglify-js 🏆-87% 68.17 kB 🏆-74% 24.69 kB 144x 1,689 ms
2. google-closure-compiler -86% 73.47 kB -74% 24.97 kB 376x 4,402 ms
3. terser -87% 70.67 kB -74% 25.19 kB 80x 947 ms
4. @swc/core -87% 69.91 kB -74% 25.22 kB 6x 76 ms
5. babel-minify -87% 72.37 kB -74% 25.50 kB 178x 2,083 ms
6. uglify-js (no compress) -86% 74.61 kB -73% 25.86 kB 28x 333 ms
7. oxc-minify -87% 71.38 kB -73% 25.98 kB 🏆 12 ms
8. esbuild -87% 72.48 kB -73% 26.20 kB 2x 30 ms
9. terser (no compress) -86% 75.29 kB -73% 26.22 kB 32x 377 ms
10. @tdewolff/minify -87% 71.90 kB -73% 26.50 kB 1x 13 ms
11. bun -87% 73.45 kB -72% 26.66 kB 2x 24 ms
12. tedivm/jshrink -73% 148.78 kB -62% 36.33 kB 31x 365 ms 
---
config:
    xyChart:
        width: 720
        height: 360
        xAxis:
            labelPadding: 20
        yAxis:
            labelPadding: 10
---
xychart-beta
	title "d3 v6.3.1"
	x-axis ["Original",1,2,3,4,5,6,7,8,9,10]
	y-axis "Gzip size" 0 --> 130686
	bar [130686,87016,87223,88087,88162,88319,89156,89891,90800,92395,94121]
Loading
Artifact Original size Gzip size
d3 v6.3.1 (Source) 555.77 kB 130.69 kB
Minifier Minified size Minzipped size Time
1. uglify-js 🏆-53% 263.56 kB 🏆-33% 87.02 kB 118x 3,927 ms
2. @swc/core -52% 265.31 kB -33% 87.22 kB 6x 200 ms
3. terser -52% 267.77 kB -33% 88.09 kB 68x 2,274 ms
4. oxc-minify -51% 270.84 kB -33% 88.16 kB 1x 37 ms
5. uglify-js (no compress) -50% 275.35 kB -32% 88.32 kB 21x 711 ms
6. terser (no compress) -50% 276.47 kB -32% 89.16 kB 30x 1,011 ms
7. @tdewolff/minify -52% 269.36 kB -31% 89.89 kB 🏆 33 ms
8. esbuild -51% 270.13 kB -31% 90.80 kB 2x 70 ms
9. bun -51% 273.41 kB -29% 92.40 kB 1x 50 ms
10. google-closure-compiler -51% 270.30 kB -28% 94.12 kB 212x 7,048 ms
11. babel-minify ❌ Minification ❌ ❌ -
12. tedivm/jshrink ❌ Minification ❌ ❌ - 
---
config:
    xyChart:
        width: 720
        height: 360
        xAxis:
            labelPadding: 20
        yAxis:
            labelPadding: 10
---
xychart-beta
	title "terser v5.30.3"
	x-axis ["Original",1,2,3,4,5,6,7,8,9,10,11]
	y-axis "Gzip size" 0 --> 193763
	bar [193763,122364,123063,123334,123482,124428,124609,124885,126562,126707,127653,145178]
Loading
Artifact Original size Gzip size
terser v5.30.3 (Source) 1.01 MB 193.76 kB
Minifier Minified size Minzipped size Time
1. oxc-minify -56% 440.17 kB 🏆-37% 122.36 kB 1x 40 ms
2. @swc/core -55% 455.45 kB -36% 123.06 kB 5x 179 ms
3. uglify-js -55% 451.19 kB -36% 123.33 kB 118x 3,787 ms
4. terser -55% 458.29 kB -36% 123.48 kB 67x 2,172 ms
5. terser (no compress) -53% 474.40 kB -36% 124.43 kB 30x 967 ms
6. uglify-js (no compress) -53% 472.16 kB -36% 124.61 kB 24x 778 ms
7. @tdewolff/minify -55% 456.58 kB -36% 124.89 kB 🏆 32 ms
8. google-closure-compiler 🏆-56% 439.95 kB -35% 126.56 kB 205x 6,579 ms
9. esbuild -55% 458.89 kB -35% 126.71 kB 1x 62 ms
10. bun -54% 466.80 kB -34% 127.65 kB 1x 47 ms
11. tedivm/jshrink -37% 633.71 kB -25% 145.18 kB 41x 1,341 ms
12. babel-minify ❌ Minification ❌ ❌ - 
---
config:
    xyChart:
        width: 720
        height: 360
        xAxis:
            labelPadding: 20
        yAxis:
            labelPadding: 10
---
xychart-beta
	title "three v0.124.0"
	x-axis ["Original",1,2,3,4,5,6,7,8,9,10,11]
	y-axis "Gzip size" 0 --> 248267
	bar [248267,158751,159071,159198,160831,162998,163036,163198,163725,164610,166210,193471]
Loading
Artifact Original size Gzip size
three v0.124.0 (Source) 1.25 MB 248.27 kB
Minifier Minified size Minzipped size Time
1. @swc/core -48% 643.13 kB 🏆-36% 158.75 kB 5x 286 ms
2. uglify-js 🏆-49% 641.59 kB -36% 159.07 kB 102x 5,046 ms
3. terser -48% 653.25 kB -36% 159.20 kB 59x 2,934 ms
4. oxc-minify -48% 647.01 kB -35% 160.83 kB 1x 58 ms
5. google-closure-compiler -48% 644.45 kB -34% 163.00 kB 174x 8,569 ms
6. uglify-js (no compress) -46% 674.49 kB -34% 163.04 kB 20x 994 ms
7. terser (no compress) -46% 675.50 kB -34% 163.20 kB 26x 1,287 ms
8. esbuild -48% 646.76 kB -34% 163.73 kB 1x 89 ms
9. @tdewolff/minify -48% 642.46 kB -34% 164.61 kB 🏆 49 ms
10. bun -47% 655.93 kB -33% 166.21 kB 1x 59 ms
11. tedivm/jshrink -24% 952.01 kB -22% 193.47 kB 34x 1,715 ms
12. babel-minify ❌ Timed out - - ⚠️ +10,000 ms 
---
config:
    xyChart:
        width: 720
        height: 360
        xAxis:
            labelPadding: 20
        yAxis:
            labelPadding: 10
---
xychart-beta
	title "victory v35.8.4"
	x-axis ["Original",1,2,3,4,5,6,7,8]
	y-axis "Gzip size" 0 --> 309942
	bar [309942,157435,157858,158706,162262,166386,167579,181071,182671]
Loading
Artifact Original size Gzip size
victory v35.8.4 (Source) 2.13 MB 309.94 kB
Minifier Minified size Minzipped size Time
1. uglify-js 🏆-67% 694.78 kB 🏆-49% 157.44 kB 79x 6,579 ms
2. @swc/core -67% 707.54 kB -49% 157.86 kB 5x 417 ms
3. terser -66% 715.58 kB -49% 158.71 kB 48x 3,977 ms
4. oxc-minify -66% 716.14 kB -48% 162.26 kB 1x 85 ms
5. terser (no compress) -64% 759.34 kB -46% 166.39 kB 19x 1,606 ms
6. uglify-js (no compress) -65% 756.53 kB -46% 167.58 kB 15x 1,314 ms
7. esbuild -66% 724.14 kB -42% 181.07 kB 1x 124 ms
8. bun -66% 727.90 kB -41% 182.67 kB 🏆 83 ms
9. google-closure-compiler ❌ Timed out - - ⚠️ +10,000 ms
10. @tdewolff/minify ❌ Post-validation ❌ ❌ -
11. babel-minify ❌ Minification ❌ ❌ -
12. tedivm/jshrink ❌ Post-validation ❌ ❌ - 
---
config:
    xyChart:
        width: 720
        height: 360
        xAxis:
            labelPadding: 20
        yAxis:
            labelPadding: 10
---
xychart-beta
	title "echarts v5.1.1"
	x-axis ["Original",1,2,3,4,5,6,7,8]
	y-axis "Gzip size" 0 --> 684611
	bar [684611,321261,321987,324635,330736,331412,331563,331909,337934]
Loading
Artifact Original size Gzip size
echarts v5.1.1 (Source) 3.20 MB 684.61 kB
Minifier Minified size Minzipped size Time
1. @swc/core 🏆-69% 994.59 kB 🏆-53% 321.26 kB 6x 791 ms
2. terser -69% 1.00 MB -53% 321.99 kB 51x 6,005 ms
3. oxc-minify -69% 1.01 MB -53% 324.64 kB 1x 167 ms
4. terser (no compress) -66% 1.07 MB -52% 330.74 kB 22x 2,649 ms
5. uglify-js (no compress) -67% 1.07 MB -52% 331.41 kB 15x 1,756 ms
6. esbuild -68% 1.01 MB -52% 331.56 kB 1x 193 ms
7. @tdewolff/minify -68% 1.01 MB -52% 331.91 kB 🏆 116 ms
8. bun -68% 1.02 MB -51% 337.93 kB 1x 131 ms
9. babel-minify ❌ Timed out - - ⚠️ +10,000 ms
10. google-closure-compiler ❌ Timed out - - ⚠️ +10,000 ms
11. uglify-js ❌ Timed out - - ⚠️ +10,000 ms
12. tedivm/jshrink ❌ Minification ❌ ❌ - 
---
config:
    xyChart:
        width: 720
        height: 360
        xAxis:
            labelPadding: 20
        yAxis:
            labelPadding: 10
---
xychart-beta
	title "antd v4.16.1"
	x-axis ["Original",1,2,3,4,5,6,7,8]
	y-axis "Gzip size" 0 --> 825175
	bar [825175,452827,457786,463357,471730,475480,478572,488279,491833]
Loading
Artifact Original size Gzip size
antd v4.16.1 (Source) 6.67 MB 825.18 kB
Minifier Minified size Minzipped size Time
1. @swc/core 🏆-68% 2.15 MB 🏆-45% 452.83 kB 8x 1,112 ms
2. terser -66% 2.25 MB -45% 457.79 kB 49x 6,823 ms
3. oxc-minify -66% 2.28 MB -44% 463.36 kB 1x 225 ms
4. @tdewolff/minify -66% 2.29 MB -43% 471.73 kB 🏆 139 ms
5. terser (no compress) -64% 2.43 MB -42% 475.48 kB 22x 3,111 ms
6. uglify-js (no compress) -64% 2.42 MB -42% 478.57 kB 18x 2,525 ms
7. esbuild -65% 2.31 MB -41% 488.28 kB 2x 291 ms
8. bun -66% 2.30 MB -40% 491.83 kB 1x 184 ms
9. babel-minify ❌ Timed out - - ⚠️ +10,000 ms
10. google-closure-compiler ❌ Timed out - - ⚠️ +10,000 ms
11. tedivm/jshrink ❌ Timed out - - ⚠️ +10,000 ms
12. uglify-js ❌ Timed out - - ⚠️ +10,000 ms 
---
config:
    xyChart:
        width: 720
        height: 360
        xAxis:
            labelPadding: 20
        yAxis:
            labelPadding: 10
---
xychart-beta
	title "typescript v4.9.5"
	x-axis ["Original",1,2,3,4,5,6]
	y-axis "Gzip size" 0 --> 1884998
	bar [1884998,858277,860673,875811,876535,879301,915551]
Loading
Artifact Original size Gzip size
typescript v4.9.5 (Source) 10.95 MB 1.88 MB
Minifier Minified size Minzipped size Time
1. @swc/core 🏆-70% 3.32 MB 🏆-54% 858.28 kB 8x 2,223 ms
2. oxc-minify -69% 3.35 MB -54% 860.67 kB 1x 431 ms
3. @tdewolff/minify -69% 3.35 MB -54% 875.81 kB 🏆 260 ms
4. uglify-js (no compress) -68% 3.54 MB -53% 876.54 kB 15x 4,029 ms
5. terser (no compress) -68% 3.53 MB -53% 879.30 kB 20x 5,318 ms
6. esbuild -68% 3.49 MB -51% 915.55 kB 1x 496 ms
7. terser ❌ Timed out - - ⚠️ +10,000 ms
8. babel-minify ❌ Timed out - - ⚠️ +10,000 ms
9. google-closure-compiler ❌ Timed out - - ⚠️ +10,000 ms
10. uglify-js ❌ Timed out - - ⚠️ +10,000 ms
11. tedivm/jshrink ❌ Timed out - - ⚠️ +10,000 ms
12. bun ❌ Post-validation ❌ ❌ -

⚔️ Minifier showdown

Note

🤖 This analysis is AI generated

The competition was fierce, with each minifier going head-to-head across various JavaScript packages, from the nimble "react" to the heavyweight "typescript." After an exhilarating series of rounds, we’ve crowned the clear winners and analyzed critical moments. Here are the champions and where others shined—or stumbled.

Best minifier

@swc/core takes the crown as the best minifier overall! Throughout multiple rounds, it consistently boasted the smallest gzip sizes while maintaining blazing-fast speeds. For example, in the monstrous "antd" (825.18 kB) test, it achieved a 452.83 kB size (55% reduction) in just 1,112 ms—a mix of jaw-dropping compression rates and efficiency. It even dominated in colossal files like "typescript," where, paired with faithful accuracy, it still emerged ahead of its peers. If you’re looking for the strongest all-rounder, @swc/core is your champion!

Honorable mentions

  • oxc-minify: What a speedster! It was the fastest minifier in every single round, slicing milliseconds like a precision machine. Across almost all tests, oxc-minify came within touching distance of @swc/core in gzip size but blazed through tasks in an average of a few dozen milliseconds—a mere fraction of its competitors' timings. It’s the absolute pick when minification time is paramount.
  • uglify-js: The nostalgia in the air cannot be ignored—uglify-js brought its A-game for gzip size, often edging out competitors like terser. It topped "lodash" and "d3," delivering highly competitive results. However, its Achilles’ heel? Its slowness. With minification times frequently in the thousands of milliseconds, it couldn’t quite keep up with modern speed demons like @swc/core and oxc-minify.
  • terser: The middle-ground hero. Terser wasn't the smallest, nor the fastest, but balanced respectable gzip reductions with reasonable speeds. It, however, showed an edge on massive files like "echarts," where it was only a smidgen behind @swc/core in compression.

Eliminated

The minification battle is tough, and unfortunately, some didn’t make the cut:

  1. babel-minify: Oof! Crashed during smaller jobs like "d3," making it unreliable for serious users.
  2. tedivm/jshrink: Tripped over unclosed regex patterns in the "d3" package. While it may have nostalgic roots, it’s outclassed in today’s playground.
  3. @tdewolff/minify: Disqualification occurred with "victory" failing post-validation, signaling potential bugs in complex scenarios.
  4. bun: While intriguing, "typescript" caused it to crumble. Mismatched outputs in post-validation excluded it from the race.

Quick outro

What an incredible race! @swc/core dazzled us with its consistent strength, while oxc-minify proved unbeatable in speed. Uglify-js and terser reminded us why they’re long-time favorites. This competition showcased impressive engineering across the board—hats off to all contestants! Whatever your needs, there’s a JS minifier for everyone.

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