Choose a version:
26% The original file has 633670 bytes (618.8k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 166030 bytes (162.1k, 26%).

After GZIP compression these minified files vary in size:
gzip -6 (default)
  56017 bytes (54.7k)
 local copy
gzip -9
  55960 bytes (54.6k)
 local copy
libdeflate -12
  53317 bytes (52.1k)
 local copy
7zip -mx=9 -tgzip
  53292 bytes (52.0k)
 local copy
pigz -11 -n
  53221 bytes (52.0k)
 local copy
zultra
  53221 bytes (52.0k)
 local copy
kzip -s0 -rn -b1
  53215 bytes (52.0k)
 local copy
Zopfli
  53125 bytes (51.9k)
 local copy
Zopfli (defluff)
  53124 bytes (51.9k)
 local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/dojo/dojo-1.11.12.min.js (or via HTTPS)

You will automatically get the smallest Dojo 1.11.12 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 --i100000 --mb8 --mls128 --bsr15 --lazy --ohh

(found March 5, 2022)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 128  --mls128
block splitting recursion 15  --bsr15
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 1 more byte (53124 bytes).
Download

Verify file integrity

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

MD5:
curl --silent --compressed https://download.dojotoolkit.org/release-1.11.12/dojo.js --location | md5sum
71a62ae0b49cc114fe7d3f1d717ca160  -
curl --silent --compressed https://minime.stephan-brumme.com/files/dojo/dojo-1.11.12.min.zopfli.js.gz | md5sum
71a62ae0b49cc114fe7d3f1d717ca160  -

SHA1:
curl --silent --compressed https://download.dojotoolkit.org/release-1.11.12/dojo.js --location | sha1sum
3cdb2e4c98a705db724b5d48680c417fc6980f6d  -
curl --silent --compressed https://minime.stephan-brumme.com/files/dojo/dojo-1.11.12.min.zopfli.js.gz | sha1sum
3cdb2e4c98a705db724b5d48680c417fc6980f6d  -

Other Versions

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

1.17.3, 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
53125 bytes -5 bytes zopfli --i100000 --mls128 --bsr15 --lazy --ohh March 5, 2022 @ 10:24
53130 bytes -1 byte zopfli --i100000 --mls8 --bsr40 --lazy --ohh March 4, 2022 @ 22:55
53131 bytes -2 bytes zopfli --i10000 --mls8 --bsr40 --lazy --ohh March 1, 2022 @ 16:21
53133 bytes -1 byte zopfli --i10000 --mls16 --bsr40 --lazy --ohh February 28, 2022 @ 00:27
53134 bytes -1 byte zopfli --i10000 --mls64 --bsr10 --lazy --ohh February 26, 2022 @ 07:38
53135 bytes -1 byte zopfli --i1000 --mls8 --bsr23 --lazy --ohh February 25, 2022 @ 03:35
53136 bytes -1 byte zopfli --i1000 --mls32 --bsr7 --lazy --ohh February 24, 2022 @ 19:54
53137 bytes -1 byte zopfli --i1000 --mls16 --bsr17 --lazy --ohh February 24, 2022 @ 18:11
53138 bytes – zopfli --i100 --mls16 --bsr17 --lazy --ohh February 24, 2022 @ 16:30

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

Most recent activity on March 14, 2022 @ 18:01.

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
2 53136 53136 53137 53138 53138 53137 53136 53133 53136 53151 53150 53137 53148 53161 53157
4 53173 53133 53135 53134 53147 53155 53133 53134 53140 53136 53143 53136 53140 53142 53162
6 53166 53136 53135 53138 53142 53135 53134 53134 53150 53147 53147 53141 53143 53144 53146
7 53163 53172 53173 53135 53133 53149 53141 53140 53146 53146 53150 53141 53144 53152 53146
8 53166 53162 53135 53135 53136 53149 53133 53135 53142 53146 53147 53146 53153 53145 53149
9 53135 53173 53135 53139 53133 53136 53135 53134 53143 53145 53146 53138 53149 53144 53145
10 53133 53162 53140 53165 53146 53134 53147 53135 53147 53146 53147 53137 53150 53151 53158
11 53166 53165 53143 53136 53137 53137 53132 53132 53136 53145 53147 53142 53145 53153 53145
12 53164 53164 53136 53134 53136 53139 53132 53133 53147 53149 53146 53146 53143 53145 53154
13 53164 53173 53135 53136 53136 53145 53132 53134 53147 53145 53147 53145 53144 53149 53143
14 53133 53161 53142 53135 53139 53139 53125 53135 53146 53151 53147 53138 53145 53145 53147
15 53168 53171 53142 53134 53135 53137 53125 53142 53148 53148 53146 53144 53143 53156 53154
16 53168 53162 53143 53167 53134 53133 53134 53135 53142 53145 53146 53146 53144 53156 53146
17 53164 53162 53136 53135 53134 53137 53134 53141 53147 53146 53150 53136 53147 53144 53154
18 53166 53173 53136 53135 53139 53137 53132 53141 53144 53145 53144 53135 53138 53150 53148
19 53168 53175 53136 53135 53138 53139 53133 53135 53146 53147 53147 53138 53145 53148 53155
20 53166 53175 53136 53135 53138 53138 53135 53141 53147 53146 53147 53144 53145 53148 53154
21 53166 53160 53135 53135 53136 53135 53135 53135 53144 53148 53147 53142 53150 53153 53148
22 53164 53162 53136 53135 53138 53134 53132 53142 53146 53147 53147 53144 53138 53149 53152
23 53168 53162 53132 53136 53134 53135 53132 53142 53144 53147 53148 53137 53146 53154 53148
25 53159 53177 53133 53135 53134 53133 53143 53143 53146 53146 53147 53137 53143 53150 53149
30 53163 53158 53136 53134 53138 53133 53133 53142 53147 53145 53147 53143 53145 53152 53149
40 53166 53167 53130 53133 53137 53133 53140 53141 53144 53145 53146 53142 53149 53144 53154

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 53138 bytes – 100%
1,000 53135 bytes -3 bytes 100%
10,000 53131 bytes -4 bytes 100%
100,000 53125 bytes -6 bytes 1.74%
1,000,000 53125 bytes – 0.58%
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
(any) 53247 bytes +122 bytes (+0.23%) +32 bytes
1 53215 bytes +90 bytes (+0.17%) –
2 53239 bytes +114 bytes (+0.21%) +24 bytes
3 53262 bytes +137 bytes (+0.26%) +47 bytes
4 53297 bytes +172 bytes (+0.32%) +82 bytes
5 53330 bytes +205 bytes (+0.39%) +115 bytes
6 53371 bytes +246 bytes (+0.46%) +156 bytes
7 53388 bytes +263 bytes (+0.50%) +173 bytes
8 53375 bytes +250 bytes (+0.47%) +160 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 - but your browser doesn't support it.
Algorithm Program Parameters Size Compared To Best Zopfli
ZPAQ (Wikipedia) zpaq zpaq -method 69 39049 bytes -14076 bytes (-26.50%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 46610 bytes -6515 bytes (-12.26%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 47516 bytes -5609 bytes (-10.56%)
Brotli (Wikipedia) brotli brotli -q 11 49111 bytes -4014 bytes (-7.56%)
LZMA2 (Wikipedia) xz xz -9 50124 bytes -3001 bytes (-5.65%)
Zstandard (Wikipedia) zstd zstd -19 51432 bytes -1693 bytes (-3.19%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 51799 bytes -1326 bytes (-2.50%)

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):
Load and Parse Data


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 2024.
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.