Choose a version:
48% The original file has 513183 bytes (501.2k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 247018 bytes (241.2k, 48%).

After GZIP compression these minified files vary in size:
unpkg
  93230 bytes (91.0k)
CDN
Boot
  81693 bytes (79.8k)
CDN
cdnjs
  81693 bytes (79.8k)
CDN
gzip -6 (default)
  81046 bytes (79.1k)
local copy
gzip -9
  80732 bytes (78.8k)
local copy
libdeflate -12
  77580 bytes (75.8k)
local copy
7zip -mx=9 -tgzip
  77029 bytes (75.2k)
local copy
kzip -s0 -rn -b8
  76781 bytes (75.0k)
local copy
zultra
  76781 bytes (75.0k)
local copy
pigz -11 -n
  76578 bytes (74.8k)
local copy
Zopfli
  76537 bytes (74.7k)
local copy
Zopfli (defluff)
  76536 bytes (74.7k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/d3/d3-5.13.1.min.js (or via HTTPS)

You will automatically get the smallest D3 5.13.1 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

Save 5156 bytes by using my D3 5.13.1 Zopfli version instead of the best available CDN (6.74% smaller than cdnjs, 76537 vs. 81693 bytes):
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 --mls512 --bsr6 --lazy --ohh

(found November 20, 2019)
Description Value Parameter
iterations 1000000  --i1000000
maximum blocks 8  --mb8
maximum length score 512  --mls512
block splitting recursion 6  --bsr6
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 (76536 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed https://raw.githubusercontent.com/mbostock/d3/v5.13.1/d3.zip --location | md5sum
ca18a9b7ccb4082469674d9b11605b7d  -
curl --silent --compressed https://minime.stephan-brumme.com/files/d3/d3-5.13.1.min.zopfli.js.gz | md5sum
ca18a9b7ccb4082469674d9b11605b7d  -

SHA1:
curl --silent --compressed https://raw.githubusercontent.com/mbostock/d3/v5.13.1/d3.zip --location | sha1sum
20745ecdfab2d97d7246362501341b361e2c7e00  -
curl --silent --compressed https://minime.stephan-brumme.com/files/d3/d3-5.13.1.min.zopfli.js.gz | sha1sum
20745ecdfab2d97d7246362501341b361e2c7e00  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
unpkg 93230 bytes ca18a9b7ccb4082469674d9b11605b7d (invalid)
Boot 81693 bytes ca18a9b7ccb4082469674d9b11605b7d November 27, 2019 @ 19:31
cdnjs 81693 bytes ca18a9b7ccb4082469674d9b11605b7d November 27, 2019 @ 19:31

Note: only the MD5 hashes are shown to keep things simple.

Other Versions

Available D3 versions at minime.stephan-brumme.com:

5.16.0, 5.15.1, 5.15.0, 5.14.2, 5.14.1, 5.14.0, 5.13.1, 5.13.0, 5.12.0, 5.11.0, 5.10.1, 5.10.0,
5.9.7, 5.9.6, 5.9.5, 5.9.4, 5.9.3, 5.9.2, 5.9.1, 5.9.0, 5.8.2, 5.8.1, 5.8.0, 5.7.0, 5.6.0, 5.5.0, 5.4.0, 5.3.0, 5.2.0, 5.1.0, 5.0.1, 5.0.0,
4.13.0, 4.12.2, 4.12.1, 4.12.0, 4.11.0, 4.10.2, 4.10.1, 4.10.0,
4.9.1, 4.9.0, 4.8.0, 4.7.4, 4.7.3, 4.7.2, 4.7.1, 4.7.0, 4.6.0, 4.5.0, 4.4.4, 4.4.3, 4.4.2, 4.4.1, 4.4.0, 4.3.0, 4.2.8, 4.2.7, 4.2.6, 4.2.5, 4.2.4, 4.2.3, 4.2.2, 4.2.1, 4.2.0, 4.1.1, 4.1.0, 4.0.0,
3.5.17, 3.5.16, 3.5.15, 3.5.14, 3.5.13, 3.5.12, 3.5.11, 3.5.10, 3.5.9, 3.5.8, 3.5.7, 3.5.6, 3.5.5, 3.5.4, 3.5.3, 3.5.2, 3.5.1, 3.5.0, 3.4.13, 3.4.12, 3.4.11, 3.4.10, 3.4.9, 3.4.8, 3.4.6, 3.4.5, 3.4.4, 3.4.3, 3.4.2, 3.4.1, 3.4.0, 3.3.13, 3.3.12, 3.3.11, 3.3.10, 3.3.9, 3.3.8, 3.3.7, 3.3.6, 3.3.5, 3.3.4, 3.3.3, 3.3.2, 3.3.1, 3.3.0, 3.2.8, 3.2.7, 3.2.6, 3.2.5, 3.2.4, 3.2.3, 3.2.2, 3.2.1, 3.2.0, 3.1.10, 3.1.9, 3.1.8, 3.1.7, 3.1.6, 3.1.5, 3.1.4, 3.1.3, 3.1.2, 3.1.1, 3.1.0, 3.0.8, 3.0.7, 3.0.6, 3.0.5, 3.0.4, 3.0.3, 3.0.2, 3.0.1, 3.0.0

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

Changelog

Best Zopfli parameters so far:
Size Improvement Parameters Found
76537 bytes -3 bytes zopfli --i1000000 --mls512 --bsr6 --lazy --ohh November 20, 2019 @ 07:02
76540 bytes -9 bytes zopfli --i100000 --mls512 --bsr6 --lazy --ohh November 19, 2019 @ 12:03
76549 bytes -10 bytes zopfli --i10000 --mls512 --bsr6 --lazy --ohh November 18, 2019 @ 22:38
76559 bytes -3 bytes zopfli --i1000 --mls2 --bsr12 --lazy --ohh November 18, 2019 @ 18:01
76562 bytes -17 bytes zopfli --i1000 --mls2 --bsr21 --lazy --ohh November 18, 2019 @ 18:00
76579 bytes zopfli --i100 --mls512 --bsr6 --lazy --ohh November 18, 2019 @ 17:13

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

Most recent activity on July 20, 2020 @ 12:55.

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
76922 76912 76991 76974 76980 76988 76995 76965 77097 77111 77125 77115 76932 76916 76929
76590 76603 76824 76832 76643 76647 76642 76828 77027 76826 76789 76837 76712 76886 76768
76567 76647 76774 76563 76777 76570 76575 76563 76537 76785 76789 76575 76727 76725 76711
77065 76701 76829 76781 76780 76567 76802 76784 76764 76759 76578 76612 76716 76820 76765
76568 76557 76873 76622 76629 76632 76855 76847 76861 76890 76930 76681 76572 76829 76737
76594 76544 76895 76771 76882 76569 76566 76769 76774 76753 76746 76584 76573 76721 76766
76565 76572 76771 76773 76891 76563 76767 76764 76768 76786 76570 76602 76563 76777 76766
76597 76887 76872 76768 76774 76561 76763 76773 76766 76738 76552 76695 76570 76809 76638
76551 76574 76771 76765 76753 76566 76763 76765 76762 76768 76572 76579 76572 76682 76737
76758 76560 76754 76567 76569 76562 76765 76773 76765 76743 76782 76589 76570 76744 76713
76560 76555 76750 76751 76774 76568 76764 76762 76768 76801 76570 76577 76570 76624 76798
76952 76758 76883 76879 76566 76566 76762 76772 76766 76742 76781 76594 76569 76761 76737
76591 76564 76765 76748 76775 76565 76764 76768 76763 76791 76773 76591 76572 76773 76735
76559 76870 76752 76559 76976 76680 76770 76847 76859 76782 76792 76595 76570 76760 76736
76561 76564 76775 76768 76775 76567 76763 76767 76765 76744 76780 76577 76776 76745 76737
76558 76875 76769 76765 76561 76863 76763 76573 76766 76739 76783 76597 76569 76715 76610
76587 76887 76760 76765 76758 76568 76762 76763 76758 76743 76776 76570 76576 76762 76710
76552 76568 76770 76777 76891 76562 76764 76763 76764 76783 76571 76602 76565 76775 76735
76752 76890 76772 76877 76776 76569 76766 76767 76767 76787 76782 76600 76571 76764 76739
76592 76887 76772 76880 76888 76567 76765 76764 76764 76784 76778 76579 76573 76769 76615
76587 76558 76770 76747 76893 76563 76767 76765 76769 76745 76779 76584 76567 76766 76615
76861 76869 76890 76561 76886 76565 76767 76766 76763 76780 76780 76742 76730 76559 76740
76553 76885 76750 76766 76890 76566 76772 76766 76767 76779 76776 76576 76569 76763 76739

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 76579 bytes 100%
1,000 76559 bytes -20 bytes 100%
10,000 76549 bytes -10 bytes 100%
100,000 76540 bytes -9 bytes 0.58%
1,000,000 76537 bytes -3 bytes 0.29%
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
76958 bytes +421 bytes (+0.55%) +177 bytes
78329 bytes +1792 bytes (+2.34%) +1548 bytes
78208 bytes +1671 bytes (+2.18%) +1427 bytes
76971 bytes +434 bytes (+0.57%) +190 bytes
76963 bytes +426 bytes (+0.56%) +182 bytes
76955 bytes +418 bytes (+0.55%) +174 bytes
76931 bytes +394 bytes (+0.51%) +150 bytes
76881 bytes +344 bytes (+0.45%) +100 bytes
76781 bytes +244 bytes (+0.32%)

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 60230 bytes -16307 bytes (-21.31%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 67040 bytes -9497 bytes (-12.41%)
LZMA2 (Wikipedia) xz xz -9 67964 bytes -8573 bytes (-11.20%)
Brotli (Wikipedia) brotli brotli -q 11 68033 bytes -8504 bytes (-11.11%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 70092 bytes -6445 bytes (-8.42%)
Zstandard (Wikipedia) zstd zstd -19 73388 bytes -3149 bytes (-4.11%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 76078 bytes -459 bytes (-0.60%)

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 2020.
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.