Choose a version:
13% The original file has 966818 bytes (944.2k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 126404 bytes (123.4k, 13%).

After GZIP compression these minified files vary in size:
Boot
  53253 bytes (52.0k)
CDN, direct link
cdnjs
  46531 bytes (45.4k)
CDN, direct link
unpkg
  46531 bytes (45.4k)
CDN, direct link
gzip -6 (default)
  46508 bytes (45.4k)
local copy
cdnhttps
  46486 bytes (45.4k)
CDN, direct link
Google
  46451 bytes (45.4k)
CDN, direct link
gzip -9
  46411 bytes (45.3k)
local copy
7zip -mx=9 -tgzip
  45037 bytes (44.0k)
local copy
kzip -s0 -rn -b1
  45014 bytes (44.0k)
local copy
libdeflate -12
  45010 bytes (44.0k)
local copy
pigz -11 -n
  44938 bytes (43.9k)
local copy
Zopfli
  44905 bytes (43.9k)
local copy
Zopfli (defluff)
  44904 bytes (43.9k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/angularjs/angular-1.3.20.min.js

You will automatically get the smallest AngularJS 1.3.20 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 1546 bytes by using my AngularJS 1.3.20 Zopfli version instead of the best available CDN (3.44% smaller than Google, 44905 vs. 46451 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 --i100000 --mb8 --mls16384 --bsr22 --lazy --ohh

(found February 9, 2016)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 16384  --mls16384
block splitting recursion 22  --bsr22
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 (44904 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed https://code.angularjs.org/1.3.20/angular.min.js --location | md5sum
a706ca14720086f417910e2eb1e60ec3  -
curl --silent --compressed http://minime.stephan-brumme.com/files/angularjs/angular-1.3.20.min.zopfli.js.gz | md5sum
a706ca14720086f417910e2eb1e60ec3  -

SHA1:
curl --silent --compressed https://code.angularjs.org/1.3.20/angular.min.js --location | sha1sum
244b1d27c4ae10cde0d2a5a19e60fb6491836286  -
curl --silent --compressed http://minime.stephan-brumme.com/files/angularjs/angular-1.3.20.min.zopfli.js.gz | sha1sum
244b1d27c4ae10cde0d2a5a19e60fb6491836286  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 53253 bytes a706ca14720086f417910e2eb1e60ec3 October 9, 2015 @ 22:35
cdnjs 46531 bytes a706ca14720086f417910e2eb1e60ec3 (invalid)
unpkg 46531 bytes a706ca14720086f417910e2eb1e60ec3 July 11, 2016 @ 15:53
cdnhttps 46486 bytes a706ca14720086f417910e2eb1e60ec3 December 24, 2015 @ 07:32
Google 46451 bytes a706ca14720086f417910e2eb1e60ec3 December 6, 2015 @ 20:30

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
44905 bytes -1 byte zopfli --i100000 --mls16384 --bsr22 --lazy --ohh February 9, 2016 @ 05:20
44906 bytes -2 bytes zopfli --i10000 --mls16384 --bsr13 --lazy --ohh February 9, 2016 @ 04:27
44908 bytes -1 byte zopfli --i1000 --mls16384 --bsr13 --lazy --ohh February 8, 2016 @ 22:56
44909 bytes -1 byte zopfli --i10000 --mls4 --bsr30 --lazy --ohh February 8, 2016 @ 22:09
44910 bytes -1 byte zopfli --i1000 --mls4 --bsr30 --lazy --ohh February 8, 2016 @ 21:47
44911 bytes -2 bytes zopfli --i1000 --mls16384 --bsr14 --lazy --ohh February 8, 2016 @ 21:42
44913 bytes zopfli --i100 --mls16384 --bsr14 --lazy --ohh February 8, 2016 @ 19:32

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

Most recent activity on July 11, 2016 @ 15:53.

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 or 100,000.
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
44943 44932 44938 44941 44940 44930 44937 44942 44934 44935 44936 44935 44940 44931 44935
44937 44938 44939 44940 44932 44934 44928 44929 44929 44922 44918 44920 44918 44914 44955
44922 44909 44909 44912 44912 44914 44917 44912 44918 44917 44919 44919 44925 44915 44923
44936 44938 44909 44920 44919 44919 44914 44920 44923 44917 44935 44927 44917 44923 44912
44918 44939 44942 44923 44938 44916 44911 44926 44921 44917 44924 44917 44921 44916 44913
44920 44930 44924 44952 44908 44912 44913 44912 44920 44918 44920 44915 44929 44916 44910
44927 44927 44925 44932 44914 44923 44922 44924 44916 44917 44924 44916 44918 44909 44918
44915 44909 44910 44924 44911 44912 44916 44923 44916 44916 44920 44916 44914 44917 44910
44915 44911 44913 44914 44911 44912 44913 44921 44914 44916 44925 44918 44913 44911 44915
44915 44910 44912 44913 44915 44918 44911 44923 44915 44916 44923 44922 44907 44905 44916
44921 44938 44941 44941 44906 44936 44909 44919 44916 44916 44921 44919 44918 44908 44915
44920 44937 44911 44921 44919 44920 44914 44920 44923 44917 44921 44921 44911 44911 44910
44915 44909 44939 44913 44909 44917 44914 44920 44914 44921 44928 44909 44912 44909 44911
44917 44937 44927 44948 44908 44917 44906 44920 44915 44916 44922 44915 44914 44916 44942
44927 44927 44930 44945 44912 44912 44919 44923 44916 44916 44921 44917 44914 44909 44948
44915 44909 44939 44941 44910 44918 44908 44921 44922 44916 44916 44918 44940 44910 44945
44928 44929 44924 44941 44939 44927 44909 44920 44914 44916 44915 44920 44914 44915 44913
44915 44938 44926 44934 44909 44917 44910 44910 44924 44916 44921 44920 44929 44908 44912
44915 44939 44909 44935 44909 44917 44908 44919 44921 44917 44923 44919 44913 44905 44912
44914 44909 44910 44914 44912 44917 44919 44920 44916 44918 44926 44917 44912 44909 44911
44927 44927 44941 44944 44926 44917 44916 44919 44916 44917 44921 44916 44917 44929 44952
44914 44908 44925 44909 44906 44918 44912 44916 44916 44918 44923 44917 44917 44910 44912
44915 44910 44910 44914 44909 44911 44910 44920 44915 44914 44923 44917 44918 44915 44910

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 44913 bytes 100%
1,000 44908 bytes -5 bytes 100%
10,000 44906 bytes -2 bytes 100%
100,000 44905 bytes -1 byte 2.61%
1,000,000
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
45014 bytes +109 bytes (+0.24%)
45014 bytes +109 bytes (+0.24%)
45025 bytes +120 bytes (+0.27%) +11 bytes
45056 bytes +151 bytes (+0.34%) +42 bytes
45073 bytes +168 bytes (+0.37%) +59 bytes
45114 bytes +209 bytes (+0.47%) +100 bytes
45097 bytes +192 bytes (+0.43%) +83 bytes
45087 bytes +182 bytes (+0.41%) +73 bytes
45109 bytes +204 bytes (+0.45%) +95 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 35853 bytes -9052 bytes (-20.16%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 37434 bytes -7471 bytes (-16.64%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 39246 bytes -5659 bytes (-12.60%)
Brotli (Wikipedia) brotli brotli -q 11 41207 bytes -3698 bytes (-8.24%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 42017 bytes -2888 bytes (-6.43%)
LZMA2 (Wikipedia) xz xz -9 42680 bytes -2225 bytes (-4.95%)
ZSTD (Wikipedia) zstd zstd -19 43800 bytes -1105 bytes (-2.46%)

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