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)
  56015 bytes (54.7k)
 local copy
gzip -9
  55959 bytes (54.6k)
 local copy
libdeflate -12
  53312 bytes (52.1k)
 local copy
7zip -mx=9 -tgzip
  53290 bytes (52.0k)
 local copy
kzip -s0 -rn -b1
  53222 bytes (52.0k)
 local copy
pigz -11 -n
  53219 bytes (52.0k)
 local copy
zultra
  53218 bytes (52.0k)
 local copy
Zopfli
  53123 bytes (51.9k)
 local copy
Zopfli (defluff)
  53122 bytes (51.9k)
 local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/dojo/dojo-1.11.11.min.js (or via HTTPS)

You will automatically get the smallest Dojo 1.11.11 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 --mls8 --bsr40 --lazy --ohh

(found March 5, 2022)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 8  --mls8
block splitting recursion 40  --bsr40
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 (53122 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-1.11.11/dojo.js --location | md5sum
4a549f301070c2743c8c8a7315ddb25a  -
curl --silent --compressed https://minime.stephan-brumme.com/files/dojo/dojo-1.11.11.min.zopfli.js.gz | md5sum
4a549f301070c2743c8c8a7315ddb25a  -

SHA1:
curl --silent --compressed https://download.dojotoolkit.org/release-1.11.11/dojo.js --location | sha1sum
bd1ee195e8a9d576b307e5c994a89d615afb5ac2  -
curl --silent --compressed https://minime.stephan-brumme.com/files/dojo/dojo-1.11.11.min.zopfli.js.gz | sha1sum
bd1ee195e8a9d576b307e5c994a89d615afb5ac2  -

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
53123 bytes -4 bytes zopfli --i100000 --mls8 --bsr40 --lazy --ohh March 5, 2022 @ 06:01
53127 bytes -3 bytes zopfli --i100000 --mls8 --bsr10 --lazy --ohh March 5, 2022 @ 01:47
53130 bytes -1 byte zopfli --i10000 --mls8 --bsr10 --lazy --ohh February 28, 2022 @ 06:27
53131 bytes -1 byte zopfli --i10000 --mls64 --bsr30 --lazy --ohh February 26, 2022 @ 23:50
53132 bytes -2 bytes zopfli --i10000 --mls8 --bsr11 --lazy --ohh February 25, 2022 @ 11:23
53134 bytes -2 bytes zopfli --i1000 --mls16 --bsr30 --lazy --ohh February 24, 2022 @ 19:23
53136 bytes -1 byte zopfli --i1000 --mls16 --bsr22 --lazy --ohh February 24, 2022 @ 17:52
53137 bytes – zopfli --i100 --mls8 --bsr14 --lazy --ohh February 24, 2022 @ 16:00

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 @ 23:23.

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 53135 53131 53132 53133 53137 53136 53134 53131 53135 53148 53148 53136 53142 53160 53155
4 53168 53131 53133 53133 53146 53145 53131 53132 53138 53136 53140 53134 53139 53142 53160
6 53163 53135 53135 53136 53142 53133 53133 53134 53142 53145 53145 53141 53142 53141 53145
7 53161 53173 53173 53134 53132 53133 53142 53141 53144 53144 53138 53140 53145 53152 53145
8 53164 53161 53133 53133 53136 53144 53131 53133 53140 53145 53144 53144 53149 53144 53148
9 53133 53167 53134 53138 53138 53137 53133 53132 53141 53143 53144 53136 53145 53145 53157
10 53131 53161 53127 53167 53146 53132 53142 53133 53145 53144 53145 53135 53149 53152 53154
11 53163 53167 53132 53134 53136 53135 53124 53131 53134 53144 53145 53141 53146 53151 53143
12 53162 53164 53134 53132 53137 53137 53124 53131 53145 53146 53144 53144 53142 53144 53152
13 53164 53171 53133 53135 53136 53140 53124 53134 53145 53143 53145 53143 53142 53147 53139
14 53132 53165 53131 53135 53137 53138 53123 53133 53145 53149 53146 53135 53144 53143 53144
15 53162 53169 53140 53132 53135 53135 53123 53141 53147 53146 53150 53142 53146 53153 53148
16 53165 53163 53132 53165 53132 53147 53133 53133 53139 53144 53144 53144 53145 53155 53145
17 53161 53162 53135 53134 53133 53137 53132 53141 53146 53146 53147 53134 53143 53141 53151
18 53165 53170 53134 53134 53137 53135 53124 53139 53144 53144 53141 53133 53141 53149 53144
19 53165 53165 53134 53134 53146 53136 53131 53133 53145 53150 53144 53136 53144 53145 53153
20 53162 53164 53134 53134 53137 53132 53133 53140 53145 53144 53145 53142 53144 53144 53154
21 53162 53160 53133 53134 53136 53134 53134 53134 53146 53146 53145 53141 53149 53143 53144
22 53161 53164 53134 53134 53137 53132 53124 53141 53145 53145 53146 53142 53141 53150 53146
23 53163 53166 53133 53134 53136 53136 53124 53140 53142 53144 53146 53135 53143 53152 53146
25 53159 53175 53131 53132 53132 53132 53139 53141 53145 53144 53145 53135 53145 53148 53147
30 53160 53169 53135 53134 53138 53131 53132 53140 53145 53143 53145 53142 53144 53152 53147
40 53162 53164 53123 53132 53132 53131 53139 53139 53142 53143 53144 53141 53150 53143 53148

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 53137 bytes – 100%
1,000 53134 bytes -3 bytes 100%
10,000 53130 bytes -4 bytes 100%
100,000 53123 bytes -7 bytes 2.90%
1,000,000 53123 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
(any) 53240 bytes +117 bytes (+0.22%) +18 bytes
1 53222 bytes +99 bytes (+0.19%) –
2 53241 bytes +118 bytes (+0.22%) +19 bytes
3 53270 bytes +147 bytes (+0.28%) +48 bytes
4 53289 bytes +166 bytes (+0.31%) +67 bytes
5 53320 bytes +197 bytes (+0.37%) +98 bytes
6 53374 bytes +251 bytes (+0.47%) +152 bytes
7 53385 bytes +262 bytes (+0.49%) +163 bytes
8 53369 bytes +246 bytes (+0.46%) +147 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 39047 bytes -14076 bytes (-26.50%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 46610 bytes -6513 bytes (-12.26%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 47516 bytes -5607 bytes (-10.55%)
Brotli (Wikipedia) brotli brotli -q 11 49054 bytes -4069 bytes (-7.66%)
LZMA2 (Wikipedia) xz xz -9 50120 bytes -3003 bytes (-5.65%)
Zstandard (Wikipedia) zstd zstd -19 51428 bytes -1695 bytes (-3.19%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 51805 bytes -1318 bytes (-2.48%)

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.