AngularJS 0.9.12 - as small as it gets (near-perfect GZIP compression)

Choose a version:

The original file has 321482 bytes (313.9k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 61973 bytes (60.5k, 19%).

After GZIP compression these minified files vary in size:

Boot	27931 bytes (27.3k)	CDN
Baidu	25220 bytes (24.6k)	CDN
cdnjs	25149 bytes (24.6k)	CDN
gzip -6 (default)	25075 bytes (24.5k)	local copy
gzip -9	25022 bytes (24.4k)	local copy
libdeflate -12	24606 bytes (24.0k)	local copy
7zip -mx=9 -tgzip	24377 bytes (23.8k)	local copy
zultra	24252 bytes (23.7k)	local copy
kzip -s0 -rn -b4	24242 bytes (23.7k)	local copy
pigz -11 -n	24199 bytes (23.6k)	local copy
Zopfli	24176 bytes (23.6k)	local copy
Zopfli (defluff)	24175 bytes (23.6k)	local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/angularjs/angular-0.9.12.min.js (or via HTTPS)

You will automatically get the smallest AngularJS 0.9.12 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 973 bytes by using my AngularJS 0.9.12 Zopfli version instead of the best available CDN (4.02% smaller than cdnjs, 24176 vs. 25149 bytes):

Download

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 --mls32768 --bsr19 --lazy --ohh

(found February 5, 2016)

Description	Value	Parameter
iterations	100000	--i100000
maximum blocks	8	--mb8
maximum length score	32768	--mls32768
block splitting recursion	19	--bsr19
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 (24175 bytes).

Download

Verify file integrity

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

MD5:
curl --silent --compressed https://code.angularjs.org/0.9.12/angular-0.9.12.min.js --location | md5sum
26d2ab0332e9a852acd95948c694ac33 -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-0.9.12.min.zopfli.js.gz | md5sum
26d2ab0332e9a852acd95948c694ac33 -

SHA1:
curl --silent --compressed https://code.angularjs.org/0.9.12/angular-0.9.12.min.js --location | sha1sum
7b376cc27f8f92dca6f9d3824912ffc4aa07e149 -
curl --silent --compressed https://minime.stephan-brumme.com/files/angularjs/angular-0.9.12.min.zopfli.js.gz | sha1sum
7b376cc27f8f92dca6f9d3824912ffc4aa07e149 -

These CDNs send you the original file:

CDN	Size (compressed)	MD5 (uncompressed)	Timestamp
Boot	27931 bytes	26d2ab0332e9a852acd95948c694ac33	March 18, 2015 @ 10:02
cdnjs	25149 bytes	26d2ab0332e9a852acd95948c694ac33	March 28, 2014 @ 14:15

And some CDNs send you a different file:

CDN	Size (compressed)	MD5 (uncompressed)	Comment / Diff	Timestamp
Baidu	25220 bytes	d053bc839364b310d487968cc9155594	only whitespaces differ	June 5, 2014 @ 10:05

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

Other Versions

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

1.8.2, 1.8.1, 1.8.0,
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,
1.6.10, 1.6.9, 1.6.8, 1.6.7, 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
24176 bytes	-1 byte	zopfli --i100000 --mls32768 --bsr19 --lazy --ohh	February 5, 2016 @ 13:23
24177 bytes	-1 byte	zopfli --i10000 --mls4096 --bsr10 --lazy --ohh	February 3, 2016 @ 11:25
24178 bytes	-1 byte	zopfli --i10000 --mls32768 --bsr19 --lazy --ohh	November 26, 2015 @ 11:14
24179 bytes	-1 byte	zopfli --i10000 --mls16 --bsr11 --lazy --ohh	November 26, 2015 @ 11:12
24180 bytes	-1 byte	zopfli --i1000 --mls16 --bsr11 --lazy --ohh	September 20, 2015 @ 19:19
24181 bytes	-2 bytes	zopfli --i1000 --mls8192 --bsr4 --lazy --ohh	September 7, 2015 @ 22:23
24183 bytes	-1 byte	zopfli --i1000 --mls4096 --bsr11 --lazy --ohh	September 7, 2015 @ 22:21
24184 bytes	-2 bytes	zopfli --i1000 --mls512 --bsr9 --lazy --ohh	September 7, 2015 @ 22:19
24186 bytes	–	zopfli --i100 --mls4096 --bsr10 --lazy --ohh	September 7, 2015 @ 16:52

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 @ 12:52.

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
2	24234	24233	24230	24232	24240	24243	24245	24243	24201	24196	24201	24213	24213	24213	24211
4	24186	24187	24186	24190	24177	24182	24194	24200	24195	24202	24198	24186	24179	24204	24199
6	24182	24185	24184	24181	24182	24186	24196	24187	24194	24184	24195	24182	24187	24194	24196
7	24183	24186	24183	24186	24184	24185	24183	24181	24180	24188	24185	24182	24183	24212	24196
8	24208	24210	24182	24207	24182	24203	24201	24197	24184	24184	24184	24197	24192	24182	24181
9	24181	24187	24181	24181	24188	24188	24183	24182	24181	24181	24184	24180	24182	24196	24182
10	24183	24183	24181	24182	24180	24179	24181	24181	24182	24183	24192	24177	24179	24196	24181
11	24179	24181	24180	24179	24183	24185	24182	24181	24181	24184	24184	24180	24181	24182	24182
12	24182	24185	24180	24181	24182	24186	24185	24182	24182	24183	24188	24182	24185	24197	24182
13	24187	24188	24185	24195	24182	24184	24183	24182	24182	24185	24185	24185	24183	24191	24182
14	24181	24184	24187	24183	24181	24186	24182	24180	24181	24181	24186	24181	24181	24200	24192
15	24180	24184	24182	24182	24182	24186	24182	24180	24181	24187	24187	24183	24181	24179	24183
16	24183	24186	24183	24181	24184	24193	24195	24196	24179	24181	24187	24183	24180	24208	24201
17	24179	24187	24184	24181	24181	24187	24184	24186	24183	24181	24184	24181	24181	24181	24197
18	24181	24183	24182	24181	24181	24185	24188	24180	24181	24186	24184	24177	24180	24192	24181
19	24181	24185	24182	24183	24179	24182	24180	24181	24182	24184	24187	24183	24182	24196	24176
20	24180	24183	24183	24185	24178	24182	24184	24181	24183	24181	24184	24180	24181	24180	24184
21	24181	24185	24188	24183	24185	24183	24179	24181	24183	24183	24184	24186	24182	24194	24190
22	24181	24185	24181	24180	24184	24184	24183	24187	24182	24186	24185	24184	24183	24181	24180
23	24180	24185	24180	24182	24184	24181	24188	24182	24181	24186	24186	24184	24184	24179	24181
25	24182	24185	24180	24181	24183	24186	24183	24180	24185	24188	24184	24183	24181	24196	24182
30	24180	24182	24182	24180	24184	24188	24182	24180	24182	24184	24184	24183	24180	24192	24188
40	24180	24186	24181	24180	24182	24185	24180	24182	24185	24188	24186	24182	24185	24196	24183

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	24185 bytes	–	100%
1,000	24180 bytes	-5 bytes	100%
10,000	24177 bytes	-3 bytes	100%
100,000	24176 bytes	-1 byte	1.45%
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
(any)	24268 bytes	+92 bytes (+0.38%)	+26 bytes
1	24677 bytes	+501 bytes (+2.07%)	+435 bytes
2	24268 bytes	+92 bytes (+0.38%)	+26 bytes
3	24282 bytes	+106 bytes (+0.44%)	+40 bytes
4	24242 bytes	+66 bytes (+0.27%)	–
5	24270 bytes	+94 bytes (+0.39%)	+28 bytes
6	24300 bytes	+124 bytes (+0.51%)	+58 bytes
7	24296 bytes	+120 bytes (+0.50%)	+54 bytes
8	24301 bytes	+125 bytes (+0.52%)	+59 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 - for example, your browser actually supports it !

Algorithm	Program	Parameters	Size	Compared To Best Zopfli
ZPAQ (Wikipedia)	zpaq	zpaq -method 69	21086 bytes	-3090 bytes (-12.78%)
RAR (proprietary)	RAR	rar a -m5 -md64m -mc63:128t -mt1	21688 bytes	-2488 bytes (-10.29%)
Brotli (Wikipedia)	brotli	brotli -q 11	22448 bytes	-1728 bytes (-7.15%)
PPMd (Wikipedia)	7zip	7za a -mx=9 -m0=ppmd	22821 bytes	-1355 bytes (-5.60%)
LZMA2 (Wikipedia)	xz	xz -9	23700 bytes	-476 bytes (-1.97%)
Burrows-Wheeler transform (Wikipedia)	bzip2	bzip2 -9	24316 bytes	+140 bytes (+0.58%)
Zstandard (Wikipedia)	zstd	zstd -19	24430 bytes	+254 bytes (+1.05%)

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):

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 2026.
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.