Choose a version:
13% The original file has 1270821 bytes (1,241.0k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 168828 bytes (164.9k, 13%).

After GZIP compression these minified files vary in size:
Boot
  68196 bytes (66.6k)
CDN, direct link
cdnjs
  59450 bytes (58.1k)
CDN, direct link
Google
  59289 bytes (57.9k)
CDN, direct link
unpkg
  58994 bytes (57.6k)
CDN, direct link
gzip -6 (default)
  58971 bytes (57.6k)
local copy
gzip -9
  58834 bytes (57.5k)
local copy
kzip -s0 -rn -b0
  57052 bytes (55.7k)
local copy
libdeflate -12
  57045 bytes (55.7k)
local copy
7zip -mx=9 -tgzip
  57034 bytes (55.7k)
local copy
pigz -11 -n
  56960 bytes (55.6k)
local copy
Zopfli
  56914 bytes (55.6k)
local copy
Zopfli (defluff)
  56912 bytes (55.6k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/angularjs/angular-1.6.6.min.js

You will automatically get the smallest AngularJS 1.6.6 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 2080 bytes by using my AngularJS 1.6.6 Zopfli version instead of the best available CDN (3.65% smaller than unpkg, 56914 vs. 58994 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 --mls8192 --bsr17 --lazy --ohh

(found August 27, 2017)
Description Value Parameter
iterations 1000000  --i1000000
maximum blocks 8  --mb8
maximum length score 8192  --mls8192
block splitting recursion 17  --bsr17
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 (56912 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed https://code.angularjs.org/1.6.6/angular.min.js --location | md5sum
4c619ef91e3fa3f1d4813db2b2eb738d  -
curl --silent --compressed http://minime.stephan-brumme.com/files/angularjs/angular-1.6.6.min.zopfli.js.gz | md5sum
4c619ef91e3fa3f1d4813db2b2eb738d  -

SHA1:
curl --silent --compressed https://code.angularjs.org/1.6.6/angular.min.js --location | sha1sum
c5f77156c6f5397be71914eb80d8f998ea1279e7  -
curl --silent --compressed http://minime.stephan-brumme.com/files/angularjs/angular-1.6.6.min.zopfli.js.gz | sha1sum
c5f77156c6f5397be71914eb80d8f998ea1279e7  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 68196 bytes 4c619ef91e3fa3f1d4813db2b2eb738d August 21, 2017 @ 06:22
cdnjs 59450 bytes 4c619ef91e3fa3f1d4813db2b2eb738d (invalid)
Google 59289 bytes 4c619ef91e3fa3f1d4813db2b2eb738d August 29, 2017 @ 20:15
unpkg 58994 bytes 4c619ef91e3fa3f1d4813db2b2eb738d (invalid)

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

Other Versions

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

1.6.6, 1.6.5, 1.6.4, 1.6.3, 1.6.2, 1.6.1, 1.6.0,
1.5.11, 1.5.10, 1.5.9, 1.5.8, 1.5.7, 1.5.6, 1.5.5, 1.5.4, 1.5.3, 1.5.2, 1.5.1, 1.5.0,
1.4.14, 1.4.13, 1.4.12, 1.4.11, 1.4.10, 1.4.9, 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,
1.3.20, 1.3.19, 1.3.18, 1.3.17, 1.3.16, 1.3.15, 1.3.14, 1.3.13, 1.3.12, 1.3.11, 1.3.10, 1.3.9, 1.3.8, 1.3.7, 1.3.6, 1.3.5, 1.3.4, 1.3.3, 1.3.2, 1.3.1, 1.3.0,
1.2.32, 1.2.31, 1.2.30, 1.2.29, 1.2.28, 1.2.27, 1.2.26, 1.2.25, 1.2.24, 1.2.23, 1.2.22, 1.2.21, 1.2.20, 1.2.19, 1.2.18, 1.2.17, 1.2.16, 1.2.15, 1.2.14, 1.2.13, 1.2.12, 1.2.11, 1.2.10, 1.2.9, 1.2.8, 1.2.7, 1.2.6, 1.2.5, 1.2.4, 1.2.3, 1.2.2, 1.2.1, 1.2.0,
1.1.5, 1.1.4, 1.1.3, 1.1.2, 1.1.1, 1.1.0,
1.0.8, 1.0.7, 1.0.6, 1.0.5, 1.0.4, 1.0.3, 1.0.2, 1.0.1, 1.0.0,
0.10.6, 0.10.5, 0.10.4, 0.10.3, 0.10.2, 0.10.1, 0.10.0,
0.9.19, 0.9.18, 0.9.17, 0.9.16, 0.9.15, 0.9.14, 0.9.13, 0.9.12, 0.9.11, 0.9.10, 0.9.9, 0.9.8, 0.9.7, 0.9.6, 0.9.5, 0.9.4, 0.9.3, 0.9.2, 0.9.1, 0.9.0

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

Changelog

Best Zopfli parameters so far:
Size Improvement Parameters Found
56914 bytes -1 byte zopfli --i1000000 --mls8192 --bsr17 --lazy --ohh August 27, 2017 @ 18:44
56915 bytes -2 bytes zopfli --i100000 --mls8192 --bsr17 --lazy --ohh August 26, 2017 @ 22:34
56917 bytes -3 bytes zopfli --i100000 --mls8192 --bsr40 --lazy --ohh August 26, 2017 @ 21:19
56920 bytes -1 byte zopfli --i10000 --mls8192 --bsr40 --lazy --ohh August 25, 2017 @ 14:08
56921 bytes -2 bytes zopfli --i10000 --mls32 --bsr25 --lazy --ohh August 25, 2017 @ 14:04
56923 bytes -2 bytes zopfli --i1000 --mls8192 --bsr17 --lazy --ohh August 25, 2017 @ 12:53
56925 bytes -1 byte zopfli --i1000 --mls32 --bsr12 --lazy --ohh August 25, 2017 @ 12:47
56926 bytes -6 bytes zopfli --i1000 --mls512 --bsr16 --lazy --ohh August 25, 2017 @ 12:46
56932 bytes zopfli --i100 --mls2 --bsr10 --lazy --ohh August 25, 2017 @ 12:15

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

Most recent activity on August 29, 2017 @ 20:15.

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
56978 56965 56963 56968 56969 56968 56968 56963 56961 56963 57059 56953 57059 56951 56975
56960 56957 56958 56972 56959 56956 56953 56958 56952 56951 56942 56952 56953 56934 56950
56959 56967 56963 56959 56955 56953 56936 56954 56956 56950 56950 56952 56942 56939 56962
56957 56956 56961 56958 56950 56954 56944 56945 56936 56951 56936 56949 56941 56946 56949
56957 56962 56960 56952 56969 56955 56936 56948 56939 56950 56943 56949 56944 56941 56944
56957 56963 56962 56970 56953 56955 56956 56957 56952 56955 56939 56944 56950 56948 56949
56917 56961 56971 56949 56942 56944 56932 56930 56929 56930 56940 56952 56935 56933 56955
56958 56945 56953 56945 56925 56940 56935 56944 56930 56930 56930 56944 56929 56934 56947
56971 56949 56953 56955 56916 56944 56931 56925 56932 56931 56924 56945 56928 56932 56953
56955 56944 56952 56937 56937 56937 56925 56939 56928 56933 56924 56944 56932 56931 56952
56956 56949 56953 56954 56934 56944 56937 56947 56925 56936 56924 56944 56942 56934 56949
56954 56943 56962 56947 56941 56940 56934 56934 56926 56929 56924 56944 56930 56933 56948
56944 56946 56959 56958 56921 56940 56925 56948 56924 56931 56938 56952 56936 56937 56953
56953 56948 56958 56971 56944 56942 56932 56939 56933 56936 56929 56946 56914 56932 56948
56958 56953 56963 56969 56952 56946 56932 56933 56924 56934 56931 56946 56943 56932 56950
56956 56926 56952 56947 56939 56939 56933 56945 56923 56929 56935 56943 56946 56933 56953
56959 56950 56964 56967 56933 56941 56931 56945 56931 56940 56932 56944 56941 56935 56952
56957 56945 56960 56955 56957 56940 56945 56933 56924 56937 56938 56944 56941 56932 56948
56958 56949 56952 56951 56936 56941 56924 56943 56932 56935 56940 56945 56941 56933 56951
56961 56955 56954 56949 56922 56940 56933 56939 56925 56927 56937 56952 56941 56934 56954
56940 56950 56955 56953 56921 56937 56931 56950 56926 56938 56924 56944 56930 56948 56951
56940 56948 56956 56951 56945 56941 56933 56935 56926 56933 56926 56945 56927 56935 56958
56938 56951 56938 56944 56936 56936 56932 56938 56923 56941 56922 56927 56917 56933 56959

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 56932 bytes 100%
1,000 56923 bytes -9 bytes 100%
10,000 56920 bytes -3 bytes 100%
100,000 56915 bytes -5 bytes 1.16%
1,000,000 56914 bytes -1 byte 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
57052 bytes +138 bytes (+0.24%)
57052 bytes +138 bytes (+0.24%)
57059 bytes +145 bytes (+0.25%) +7 bytes
57070 bytes +156 bytes (+0.27%) +18 bytes
57072 bytes +158 bytes (+0.28%) +20 bytes
57084 bytes +170 bytes (+0.30%) +32 bytes
57071 bytes +157 bytes (+0.28%) +19 bytes
57111 bytes +197 bytes (+0.35%) +59 bytes
57104 bytes +190 bytes (+0.33%) +52 bytes

Non-DEFLATE Algorithms

Archivers based on completely different compression algorithms often produce superior results.
Unfortunately, browsers only support gzip compression at the moment.
Algorithm Program Parameters Size Compared To Best Zopfli
ZPAQ (Wikipedia) zpaq zpaq -method 69 44019 bytes -12895 bytes (-22.66%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 46483 bytes -10431 bytes (-18.33%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 48192 bytes -8722 bytes (-15.32%)
Brotli (Wikipedia) brotli brotli -q 11 51656 bytes -5258 bytes (-9.24%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 52458 bytes -4456 bytes (-7.83%)
LZMA2 (Wikipedia) xz xz -9 53216 bytes -3698 bytes (-6.50%)
ZSTD (Wikipedia) zstd zstd -19 54781 bytes -2133 bytes (-3.75%)

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 2017.
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