Choose a version:
14% The original file has 777753 bytes (759.5k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 106506 bytes (104.0k, 14%).

After GZIP compression these minified files vary in size:
Boot
  44925 bytes (43.9k)
CDN, direct link
cdnjs
  39577 bytes (38.6k)
CDN, direct link
gzip -6 (default)
  39324 bytes (38.4k)
local copy
cdnhttps
  39302 bytes (38.4k)
CDN, direct link
Yandex
  39261 bytes (38.3k)
CDN, direct link
gzip -9
  39260 bytes (38.3k)
local copy
Google
  39253 bytes (38.3k)
CDN, direct link
7zip -mx=9 -tgzip
  38084 bytes (37.2k)
local copy
kzip -s0 -rn -b1
  38080 bytes (37.2k)
local copy
libdeflate -12
  38050 bytes (37.2k)
local copy
pigz -11 -n
  38044 bytes (37.2k)
local copy
Zopfli
  38011 bytes (37.1k)
local copy
Zopfli (defluff)
  38010 bytes (37.1k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/angularjs/angular-1.2.21.min.js

You will automatically get the smallest AngularJS 1.2.21 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 1242 bytes by using my AngularJS 1.2.21 Zopfli version instead of the best available CDN (3.27% smaller than Google, 38011 vs. 39253 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 --mls256 --bsr14 --lazy --ohh

(found November 27, 2015)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 256  --mls256
block splitting recursion 14  --bsr14
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 (38010 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed https://code.angularjs.org/1.2.21/angular.min.js --location | md5sum
adeb4d7ed4d2b5e90bb397072f385beb  -
curl --silent --compressed http://minime.stephan-brumme.com/files/angularjs/angular-1.2.21.min.zopfli.js.gz | md5sum
adeb4d7ed4d2b5e90bb397072f385beb  -

SHA1:
curl --silent --compressed https://code.angularjs.org/1.2.21/angular.min.js --location | sha1sum
7f090affc71727e6fe0cbb210db33f853eef4f6a  -
curl --silent --compressed http://minime.stephan-brumme.com/files/angularjs/angular-1.2.21.min.zopfli.js.gz | sha1sum
7f090affc71727e6fe0cbb210db33f853eef4f6a  -

All listed CDNs deliver identical contents:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 44925 bytes adeb4d7ed4d2b5e90bb397072f385beb March 18, 2015 @ 10:30
cdnjs 39577 bytes adeb4d7ed4d2b5e90bb397072f385beb December 18, 2014 @ 18:00
cdnhttps 39302 bytes adeb4d7ed4d2b5e90bb397072f385beb December 24, 2015 @ 07:32
Yandex 39261 bytes adeb4d7ed4d2b5e90bb397072f385beb June 11, 2015 @ 14:17
Google 39253 bytes adeb4d7ed4d2b5e90bb397072f385beb July 25, 2014 @ 20:24

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

Other Versions

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

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
38011 bytes -1 byte zopfli --i100000 --mls256 --bsr14 --lazy --ohh November 27, 2015 @ 23:05
38012 bytes -1 byte zopfli --i10000 --mls2048 --bsr6 --lazy --ohh September 9, 2015 @ 15:07
38013 bytes -2 bytes zopfli --i10000 --mls512 --bsr11 --lazy --ohh September 9, 2015 @ 14:43
38015 bytes -1 byte zopfli --i1000 --mls2048 --bsr14 --lazy --ohh September 7, 2015 @ 19:50
38016 bytes -2 bytes zopfli --i1000 --mls512 --bsr10 --lazy --ohh September 7, 2015 @ 19:49
38018 bytes zopfli --i100 --mls4096 --bsr8 --lazy --ohh September 7, 2015 @ 16:30

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

Most recent activity on June 16, 2016 @ 14:40.

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
38015 38015 38015 38013 38012 38013 38013 38013 38016 38015 38018 38019 38017 38014 38015
38016 38016 38030 38017 38023 38033 38015 38016 38016 38017 38014 38011 38017 38015 38018
38014 38015 38019 38014 38013 38016 38013 38015 38012 38013 38011 38015 38013 38015 38017
38011 38013 38014 38016 38016 38031 38029 38026 38029 38015 38021 38014 38014 38013 38016
38013 38014 38018 38015 38017 38016 38013 38014 38013 38018 38023 38013 38013 38014 38015
38024 38027 38034 38042 38016 38028 38025 38024 38033 38021 38030 38028 38030 38013 38015
38022 38016 38022 38014 38018 38030 38029 38014 38013 38014 38030 38029 38013 38014 38013
38013 38013 38012 38018 38020 38029 38016 38028 38013 38014 38022 38030 38014 38014 38014
38014 38013 38014 38016 38018 38017 38017 38013 38031 38014 38030 38028 38013 38014 38017
38013 38014 38014 38015 38015 38017 38014 38015 38011 38018 38018 38015 38014 38014 38016
38023 38022 38022 38015 38013 38017 38013 38011 38013 38018 38013 38016 38013 38014 38016
38023 38016 38022 38017 38016 38018 38019 38025 38012 38015 38021 38013 38014 38014 38016
38022 38021 38023 38042 38019 38027 38029 38026 38028 38033 38028 38023 38014 38013 38014
38012 38013 38014 38028 38032 38026 38030 38026 38033 38029 38030 38029 38012 38015 38015
38014 38013 38014 38019 38019 38030 38024 38035 38013 38014 38016 38015 38013 38014 38016
38014 38015 38016 38013 38013 38013 38013 38015 38016 38018 38018 38014 38013 38013 38013
38013 38013 38013 38013 38017 38013 38013 38015 38012 38012 38023 38014 38016 38014 38015
38017 38012 38013 38014 38014 38017 38014 38033 38014 38014 38020 38013 38013 38013 38013
38022 38022 38023 38041 38023 38031 38029 38035 38013 38013 38018 38017 38013 38014 38015
38013 38014 38021 38014 38019 38016 38015 38021 38012 38014 38016 38013 38012 38014 38014
38014 38013 38016 38014 38016 38017 38014 38013 38026 38014 38023 38028 38013 38014 38017
38012 38013 38023 38022 38030 38026 38029 38035 38012 38014 38018 38014 38014 38014 38017
38012 38011 38014 38014 38016 38017 38013 38013 38013 38014 38018 38015 38013 38013 38015

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 38016 bytes 100%
1,000 38014 bytes -2 bytes 100%
10,000 38011 bytes -3 bytes 100%
100,000 38011 bytes 2.03%
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
38081 bytes +70 bytes (+0.18%) +1 byte
38080 bytes +69 bytes (+0.18%)
38106 bytes +95 bytes (+0.25%) +26 bytes
38133 bytes +122 bytes (+0.32%) +53 bytes
38179 bytes +168 bytes (+0.44%) +99 bytes
38205 bytes +194 bytes (+0.51%) +125 bytes
38219 bytes +208 bytes (+0.55%) +139 bytes
38201 bytes +190 bytes (+0.50%) +121 bytes
38218 bytes +207 bytes (+0.54%) +138 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 30836 bytes -7175 bytes (-18.88%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 32046 bytes -5965 bytes (-15.69%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 33549 bytes -4462 bytes (-11.74%)
Brotli (Wikipedia) brotli brotli -q 11 34942 bytes -3069 bytes (-8.07%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 35896 bytes -2115 bytes (-5.56%)
LZMA2 (Wikipedia) xz xz -9 36316 bytes -1695 bytes (-4.46%)
ZSTD (Wikipedia) zstd zstd -19 37231 bytes -780 bytes (-2.05%)

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