Choose a version:
26% The original file has 633795 bytes (618.9k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 166077 bytes (162.2k, 26%).

After GZIP compression these minified files vary in size:
gzip -6 (default)
  56041 bytes (54.7k)
local copy
gzip -9
  55984 bytes (54.7k)
local copy
libdeflate -12
  53340 bytes (52.1k)
local copy
7zip -mx=9 -tgzip
  53315 bytes (52.1k)
local copy
zultra
  53243 bytes (52.0k)
local copy
kzip -s0 -rn -b1
  53241 bytes (52.0k)
local copy
pigz -11 -n
  53241 bytes (52.0k)
local copy
Zopfli
  53146 bytes (51.9k)
local copy
Zopfli (defluff)
  53144 bytes (51.9k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/dojo/dojo-1.11.13.min.js (or via HTTPS)

You will automatically get the smallest Dojo 1.11.13 file, ETag caching is available and
if your browser doesn't support GZIP decompression then the uncompressed version will be sent.

Currently best Zopfli settings

You can use my super-compressed files for whatever purpose you like as long as you respect the library's original license agreement.
There are no restrictions from my side - but please avoid hot-linking if you run a high-traffic website.

These command-line settings yielded the best compression ratio so far (Linux version of zopfli-krzymod):
zopfli --i1000000 --mb8 --mls128 --bsr11 --lazy --ohh

(found March 8, 2022)
Description Value Parameter
iterations 1000000  --i1000000
maximum blocks 8  --mb8
maximum length score 128  --mls128
block splitting recursion 11  --bsr11
lazy matching in LZ77 yes  --lazy
optimized Huffman headers yes  --ohh
initial random W for iterations 1  --rw1
initial random Z for iterations 2  --rz2

Even Smaller Files Thanks To Defluff

Zopfli's output can be further optimized by the defluff tool.
In this particular case, defluff saves 2 more bytes (53144 bytes).

Verify file integrity

After decompression, my uncompressed files are identical to the original ones:

MD5:
curl --silent --compressed https://download.dojotoolkit.org/release-1.11.13/dojo.js --location | md5sum
bd1f1c598d4c448582071569f7c8700a  -
curl --silent --compressed https://minime.stephan-brumme.com/files/dojo/dojo-1.11.13.min.zopfli.js.gz | md5sum
bd1f1c598d4c448582071569f7c8700a  -

SHA1:
curl --silent --compressed https://download.dojotoolkit.org/release-1.11.13/dojo.js --location | sha1sum
a6250ffd333254a3ab5cbcf8f0966a6e6fc66ada  -
curl --silent --compressed https://minime.stephan-brumme.com/files/dojo/dojo-1.11.13.min.zopfli.js.gz | sha1sum
a6250ffd333254a3ab5cbcf8f0966a6e6fc66ada  -

Other Versions

Available Dojo versions at minime.stephan-brumme.com:

1.17.2, 1.17.1, 1.17.0,
1.16.5, 1.16.4, 1.16.3, 1.16.2, 1.16.1, 1.16.0,
1.15.6, 1.15.5, 1.15.4, 1.15.3, 1.15.2, 1.15.1, 1.15.0,
1.14.9, 1.14.8, 1.14.7, 1.14.6, 1.14.5, 1.14.4, 1.14.3, 1.14.2, 1.14.1, 1.14.0,
1.13.10, 1.13.9, 1.13.8, 1.13.7, 1.13.6, 1.13.5, 1.13.4, 1.13.3, 1.13.2, 1.13.1, 1.13.0,
1.12.11, 1.12.10, 1.12.9, 1.12.8, 1.12.7, 1.12.6, 1.12.5, 1.12.4, 1.12.3, 1.12.2, 1.12.1,
1.11.13, 1.11.12, 1.11.11, 1.11.10, 1.11.9, 1.11.8, 1.11.7, 1.11.6, 1.11.5, 1.11.4, 1.11.3, 1.11.2, 1.11.1, 1.11.0,
1.10.10, 1.10.9, 1.10.8, 1.10.7, 1.10.6, 1.10.5, 1.10.4, 1.10.3, 1.10.2, 1.10.1, 1.10.0,
1.9.11, 1.9.10, 1.9.9, 1.9.8, 1.9.7, 1.9.6, 1.9.5, 1.9.4, 1.9.3, 1.9.2, 1.9.1, 1.9.0,
1.8.14, 1.8.13, 1.8.12, 1.8.11, 1.8.10, 1.8.9, 1.8.8, 1.8.7, 1.8.6, 1.8.5, 1.8.4, 1.8.3, 1.8.2, 1.8.1, 1.8.0,
1.7.12, 1.7.11, 1.7.10, 1.7.9, 1.7.8, 1.7.7, 1.7.6, 1.7.5, 1.7.4, 1.7.3, 1.7.2, 1.7.1, 1.7.0,
1.6.5, 1.6.4, 1.6.3, 1.6.2, 1.6.1, 1.6.0,
1.5.6, 1.5.5, 1.5.4, 1.5.3, 1.5.2, 1.5.1, 1.5.0,
1.4.8, 1.4.7, 1.4.6, 1.4.5, 1.4.4, 1.4.3, 1.4.2, 1.4.1, 1.4.0,
1.3.3, 1.3.2, 1.3.1, 1.3.0,
1.2.3, 1.2.2

The project site contains an overview how well these versions were compressed.
Other interesting projects are AngularJS, BackboneJS, Bootstrap, D3, Ember, jQuery, Knockout, lodash, React, Socket.IO, ThreeJS, UnderscoreJS and Vue.

Changelog

Best Zopfli parameters so far:
Size Improvement Parameters Found
53146 bytes -1 byte zopfli --i1000000 --mls128 --bsr11 --lazy --ohh March 8, 2022 @ 04:34
53147 bytes -1 byte zopfli --i1000000 --mls128 --bsr15 --lazy --ohh March 7, 2022 @ 19:41
53148 bytes -3 bytes zopfli --i100000 --mls128 --bsr15 --lazy --ohh March 5, 2022 @ 08:07
53151 bytes -3 bytes zopfli --i100000 --mls8 --bsr10 --lazy --ohh March 5, 2022 @ 01:10
53154 bytes -1 byte zopfli --i10000 --mls8 --bsr10 --lazy --ohh February 28, 2022 @ 17:20
53155 bytes -1 byte zopfli --i10000 --mls2 --bsr14 --lazy --ohh February 27, 2022 @ 04:15
53156 bytes -2 bytes zopfli --i10000 --mls128 --bsr17 --lazy --ohh February 26, 2022 @ 08:12
53158 bytes -1 byte zopfli --i10000 --mls64 --bsr2 --lazy --ohh February 25, 2022 @ 21:07
53159 bytes -1 byte zopfli --i10000 --mls16 --bsr30 --lazy --ohh February 25, 2022 @ 06:04
53160 bytes -1 byte zopfli --i1000 --mls32 --bsr25 --lazy --ohh February 24, 2022 @ 20:54
53161 bytes -1 byte zopfli --i1000 --mls8 --bsr23 --lazy --ohh February 24, 2022 @ 18:19
53162 bytes -1 byte zopfli --i1000 --mls16 --bsr21 --lazy --ohh February 24, 2022 @ 17:28
53163 bytes zopfli --i100 --mls16 --bsr30 --lazy --ohh February 24, 2022 @ 15:24

If there are multiple parameter sets yielding the same compressed size, only the first one found is shown.

Most recent activity on March 8, 2022 @ 13:21.

Heatmaps

This Zopfli heatmap visualizes how compression changes when modifying the --bsr and --mls parameter.
Cell's contents is the best filesize achieved (in bytes, hover with mouse over cells to see number of iterations).

Good parameters are green, bad are red. The best and worst are bold as well.
The brightness of the blue background color indicates how many iterations were processed:
10,000, 100,000 or 1,000,000.
bsr \ mls
2 4 8 16 32 64 128 256 512 1024 2048 4096 8192 16384 32768
bsr \ mls
2 4 8 16 32 64 128 256 512 1024 2048 4096 8192 16384 32768
53158 53160 53157 53158 53158 53158 53157 53161 53158 53180 53172 53161 53169 53183 53180
53187 53155 53158 53158 53173 53164 53160 53158 53164 53161 53166 53158 53168 53159 53180
53199 53187 53158 53157 53167 53158 53167 53158 53168 53168 53169 53164 53168 53169 53168
53190 53193 53161 53193 53157 53161 53164 53162 53162 53160 53172 53163 53164 53177 53169
53188 53187 53157 53157 53160 53171 53157 53156 53171 53169 53170 53168 53175 53170 53173
53192 53196 53158 53163 53157 53162 53157 53156 53165 53168 53168 53166 53167 53173 53185
53155 53186 53151 53188 53170 53157 53155 53157 53169 53168 53171 53167 53174 53172 53177
53190 53190 53156 53158 53161 53160 53146 53149 53159 53168 53169 53164 53169 53162 53173
53188 53189 53159 53188 53161 53162 53156 53155 53169 53166 53168 53169 53166 53168 53168
53186 53185 53156 53159 53161 53163 53155 53159 53169 53168 53169 53166 53171 53161 53168
53155 53189 53156 53160 53168 53161 53147 53159 53171 53170 53170 53166 53170 53167 53168
53186 53192 53164 53158 53159 53159 53147 53165 53171 53168 53169 53165 53169 53177 53169
53189 53184 53156 53192 53157 53169 53157 53167 53164 53168 53169 53168 53166 53178 53168
53186 53186 53164 53159 53157 53160 53156 53165 53169 53166 53171 53168 53168 53166 53174
53189 53196 53159 53158 53157 53160 53155 53164 53169 53169 53166 53166 53166 53174 53169
53186 53187 53159 53158 53164 53160 53155 53159 53171 53166 53169 53161 53170 53167 53180
53187 53196 53159 53158 53162 53162 53156 53164 53170 53168 53169 53165 53170 53167 53176
53186 53183 53158 53158 53160 53158 53157 53157 53166 53169 53169 53166 53173 53173 53169
53188 53183 53159 53156 53161 53157 53155 53165 53165 53169 53171 53166 53165 53161 53168
53191 53185 53157 53158 53157 53160 53155 53164 53169 53168 53173 53167 53165 53176 53168
53184 53197 53157 53158 53156 53155 53163 53166 53170 53168 53169 53168 53166 53174 53171
53185 53183 53159 53159 53162 53156 53156 53165 53170 53168 53169 53168 53169 53165 53170
53190 53179 53155 53159 53161 53156 53156 53164 53165 53167 53168 53164 53171 53178 53169

Due to the Monte Carlo design of my search algorithm, not all parameters have reached the same number of iterations yet:
Iterations Min. Bytes Reduction Coverage
100 53163 bytes 100%
1,000 53160 bytes -3 bytes 100%
10,000 53154 bytes -6 bytes 100%
100,000 53148 bytes -6 bytes 2.03%
1,000,000 53146 bytes -2 bytes 0.87%
10,000,000

KZIP has far less options available for tuning/optimization. I only played around with the number of blocks (parameter -n):
Blocks Min. Bytes Compared To Best Zopfli Compared To Best KZIP
53272 bytes +126 bytes (+0.24%) +31 bytes
53241 bytes +95 bytes (+0.18%)
53271 bytes +125 bytes (+0.24%) +30 bytes
53295 bytes +149 bytes (+0.28%) +54 bytes
53324 bytes +178 bytes (+0.33%) +83 bytes
53339 bytes +193 bytes (+0.36%) +98 bytes
53388 bytes +242 bytes (+0.46%) +147 bytes
53400 bytes +254 bytes (+0.48%) +159 bytes
53396 bytes +250 bytes (+0.47%) +155 bytes

Non-DEFLATE Algorithms

Archivers based on completely different compression algorithms often produce superior results.
Unfortunately, browsers only support gzip compression at the moment.
However, support for Brotli is constantly growing - for example, your browser actually supports it !
Algorithm Program Parameters Size Compared To Best Zopfli
ZPAQ (Wikipedia) zpaq zpaq -method 69 39062 bytes -14084 bytes (-26.50%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 46626 bytes -6520 bytes (-12.27%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 47537 bytes -5609 bytes (-10.55%)
Brotli (Wikipedia) brotli brotli -q 11 49152 bytes -3994 bytes (-7.52%)
LZMA2 (Wikipedia) xz xz -9 50144 bytes -3002 bytes (-5.65%)
Zstandard (Wikipedia) zstd zstd -19 51445 bytes -1701 bytes (-3.20%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 51603 bytes -1543 bytes (-2.90%)

Detailled Analysis

I wrote a DEFLATE decoder in Javascript. Click the button below to start a client-side analysis of the smallest gzipped files (may take a second):


Notes: pigz is a fast open source multi-threaded implementation of gzip written by one of the original authors of gzip.
However, when using compression level 11, pigz actually switches to the slower Zopfli algorithm and isn't multi-threaded anymore.
KrzyMOD's extensions to Zopfli offer the highest level of configuration and is therefore used for my brute-force search.
Ken Silverman wrote the closed-source KZIP compression program and Jonathon Fowler ported it to Linux.
Defluff was created by Joachim Henke; DeflOpt is a tool by Ben Jos Walbeehm.

website made by Stephan Brumme in 2015 and still improving in 2022.
all timestamps are displayed in central european time. see my changelog.
no flash, not even images or external css files - and everything squeezed into a single html file.
which was handsomely compressed before releasing it into the wild internet - obviously.

please visit my homepage and my blog, too.
email: minime (at) stephan-brumme.com

All trademarks are property of their respective owners. You know, the boring legal stuff.