Choose a version:
34% The original file has 242727 bytes (237.0k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 83519 bytes (81.6k, 34%).

After GZIP compression these minified files vary in size:
Microsoft
  37322 bytes (36.4k)
CDN, direct link
jsdelivr
  34037 bytes (33.2k)
CDN, direct link
Boot
  34033 bytes (33.2k)
CDN, direct link
Baidu
  29561 bytes (28.9k)
CDN, direct link
cdnjs
  29548 bytes (28.9k)
CDN, direct link
gzip -6 (default)
  29383 bytes (28.7k)
local copy
Google
  29359 bytes (28.7k)
CDN, direct link
cdnhttps
  29359 bytes (28.7k)
CDN, direct link
Sina
  29329 bytes (28.6k)
CDN, direct link
gzip -9
  29321 bytes (28.6k)
local copy
7zip -mx=9 -tgzip
  28355 bytes (27.7k)
local copy
Yandex
  28279 bytes (27.6k)
CDN, direct link
pigz -11 -n
  28276 bytes (27.6k)
local copy
libdeflate -12
  28275 bytes (27.6k)
local copy
kzip -s0 -rn -b3
  28266 bytes (27.6k)
local copy
Zopfli
  28254 bytes (27.6k)
local copy
Zopfli (defluff)
  28253 bytes (27.6k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/jquery/jquery-2.0.1.min.js

You will automatically get the smallest jQuery 2.0.1 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 25 bytes by using my jQuery 2.0.1 Zopfli version instead of the best available CDN (0.09% smaller than Yandex, 28254 vs. 28279 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 --mls4096 --bsr14 --lazy --ohh

(found September 6, 2015)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 4096  --mls4096
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 (28253 bytes).

Verify file integrity

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

MD5:
curl --silent --compressed http://code.jquery.com/jquery-2.0.1.min.js --location | md5sum
ddfdd15c6936e851df7aabe4d5801f1c  -
curl --silent --compressed http://minime.stephan-brumme.com/files/jquery/jquery-2.0.1.min.zopfli.js.gz | md5sum
ddfdd15c6936e851df7aabe4d5801f1c  -

SHA1:
curl --silent --compressed http://code.jquery.com/jquery-2.0.1.min.js --location | sha1sum
2a35d61baf7dde4a800b08fd7b495a62a8a1e620  -
curl --silent --compressed http://minime.stephan-brumme.com/files/jquery/jquery-2.0.1.min.zopfli.js.gz | sha1sum
2a35d61baf7dde4a800b08fd7b495a62a8a1e620  -

These CDNs send you the original file:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Microsoft 37322 bytes ddfdd15c6936e851df7aabe4d5801f1c (invalid)
jsdelivr 34037 bytes ddfdd15c6936e851df7aabe4d5801f1c (invalid)
Sina 29329 bytes ddfdd15c6936e851df7aabe4d5801f1c (invalid)
Yandex 28279 bytes ddfdd15c6936e851df7aabe4d5801f1c June 15, 2015 @ 21:17

And some CDNs send you a different file:
CDN Size (compressed) MD5 (uncompressed) Comment / Diff Timestamp
Boot 34033 bytes eeadd54c3e1761bb438b4e16821fd674 < //@ sourceMappingURL=jquery-2.0.1.min.map
> //@ sourceMappingURL=jquery.min.map
March 18, 2015 @ 09:43
Baidu 29561 bytes 5aacc6bdd29f90c596188138292d1519 < //@ sourceMappingURL=jquery-2.0.1.min.map
> //@ sourceMappingURL=jquery.min.map
January 7, 2015 @ 10:16
cdnjs 29548 bytes eeadd54c3e1761bb438b4e16821fd674 < //@ sourceMappingURL=jquery-2.0.1.min.map
> //@ sourceMappingURL=jquery.min.map
(invalid)
Google 29359 bytes eeadd54c3e1761bb438b4e16821fd674 < //@ sourceMappingURL=jquery-2.0.1.min.map
> //@ sourceMappingURL=jquery.min.map
(invalid)
cdnhttps 29359 bytes eeadd54c3e1761bb438b4e16821fd674 only different sourceMappingURL December 24, 2015 @ 07:33

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

Other Versions

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

3.2.1, 3.2.0,
3.1.1, 3.1.0,
3.0.0,
2.2.4, 2.2.3, 2.2.2, 2.2.1, 2.2.0,
2.1.4, 2.1.3, 2.1.2, 2.1.1, 2.1.0,
2.0.3, 2.0.2, 2.0.1, 2.0.0,
1.12.4, 1.12.3, 1.12.2, 1.12.1, 1.12.0,
1.11.3, 1.11.2, 1.11.1, 1.11.0,
1.10.2, 1.10.1, 1.10.0,
1.9.1, 1.9.0,
1.8.3, 1.8.2, 1.8.1, 1.8.0,
1.7.2, 1.7.1, 1.7.0,
1.6.4, 1.6.3, 1.6.2, 1.6.1, 1.6,
1.5.2, 1.5.1, 1.5,
1.4.4, 1.4.3, 1.4.2, 1.4.1, 1.4,
1.3.2, 1.3.1, 1.3,
1.2.6, 1.2.5, 1.2.4, 1.2.3, 1.2.2, 1.2.1, 1.2,
1.1.4, 1.1.3, 1.1.2, 1.1.1, 1.1,
1.0.4, 1.0.3, 1.0.2, 1.0.1, 1.0

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

Changelog

Best Zopfli parameters so far:
Size Improvement Parameters Found
28254 bytes -1 byte zopfli --i100000 --mls4096 --bsr14 --lazy --ohh September 6, 2015 @ 07:50
28255 bytes -1 byte zopfli --i100000 --mls8192 --bsr11 --lazy --ohh September 6, 2015 @ 06:13
28256 bytes -4 bytes zopfli --i100000 --mls512 --bsr10 --lazy --ohh September 1, 2015 @ 23:07
28260 bytes -3 bytes zopfli --i10000 --mls512 --bsr10 --lazy --ohh September 1, 2015 @ 20:59
28263 bytes -1 byte zopfli --i1000 --mls512 --bsr10 --lazy --ohh September 1, 2015 @ 20:35
28264 bytes -1 byte zopfli --i1000 --mls512 --bsr6 --lazy --ohh September 1, 2015 @ 20:34
28265 bytes zopfli --i100 --mls512 --bsr14 --lazy --ohh September 1, 2015 @ 20:17

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
28264 28261 28261 28263 28264 28264 28266 28264 28261 28262 28262 28264 28262 28271 28281
28264 28264 28264 28270 28263 28264 28265 28261 28257 28259 28259 28259 28257 28261 28260
28260 28262 28266 28269 28269 28263 28267 28261 28257 28260 28260 28261 28255 28270 28268
28265 28262 28269 28269 28264 28260 28265 28260 28264 28262 28262 28263 28261 28271 28255
28265 28265 28269 28270 28264 28266 28266 28261 28257 28260 28260 28260 28255 28265 28272
28264 28267 28264 28268 28263 28264 28267 28260 28258 28261 28260 28260 28257 28260 28260
28264 28265 28264 28263 28267 28266 28267 28263 28256 28260 28259 28258 28256 28271 28268
28264 28265 28264 28266 28264 28266 28266 28263 28258 28258 28260 28258 28255 28270 28268
28264 28264 28265 28262 28264 28264 28265 28263 28259 28258 28259 28258 28256 28265 28266
28272 28267 28265 28268 28263 28262 28270 28264 28257 28261 28260 28261 28256 28260 28268
28264 28271 28264 28263 28264 28259 28263 28260 28257 28257 28259 28254 28255 28265 28267
28262 28265 28266 28268 28264 28264 28265 28257 28261 28260 28261 28262 28261 28269 28267
28273 28262 28267 28262 28264 28263 28266 28262 28257 28257 28260 28258 28257 28260 28269
28270 28265 28270 28268 28265 28261 28265 28260 28262 28262 28261 28262 28261 28269 28267
28273 28264 28264 28264 28264 28265 28267 28263 28263 28261 28261 28254 28261 28262 28266
28265 28265 28264 28266 28267 28263 28263 28261 28261 28261 28260 28264 28260 28268 28267
28270 28270 28264 28271 28264 28261 28267 28261 28262 28266 28262 28263 28262 28269 28268
28272 28262 28267 28268 28266 28256 28263 28262 28261 28261 28255 28256 28260 28261 28268
28265 28263 28270 28270 28264 28260 28265 28261 28263 28264 28263 28256 28260 28267 28269
28264 28266 28264 28267 28264 28265 28268 28260 28261 28261 28261 28256 28261 28269 28266
28263 28266 28264 28270 28264 28260 28261 28263 28261 28261 28263 28262 28262 28269 28267
28274 28271 28264 28266 28264 28262 28270 28261 28262 28262 28261 28259 28260 28268 28268
28263 28265 28264 28264 28268 28263 28263 28260 28262 28261 28261 28261 28261 28269 28268

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 28262 bytes 100%
1,000 28260 bytes -2 bytes 100%
10,000 28258 bytes -2 bytes 100%
100,000 28254 bytes -4 bytes 18.26%
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
28344 bytes +90 bytes (+0.32%) +78 bytes
28343 bytes +89 bytes (+0.31%) +77 bytes
28267 bytes +13 bytes (+0.05%) +1 byte
28266 bytes +12 bytes (+0.04%)
28275 bytes +21 bytes (+0.07%) +9 bytes
28308 bytes +54 bytes (+0.19%) +42 bytes
28353 bytes +99 bytes (+0.35%) +87 bytes
28388 bytes +134 bytes (+0.47%) +122 bytes
28415 bytes +161 bytes (+0.57%) +149 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 23465 bytes -4789 bytes (-16.95%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 23956 bytes -4298 bytes (-15.21%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 25145 bytes -3109 bytes (-11.00%)
Brotli (Wikipedia) brotli brotli -q 11 26437 bytes -1817 bytes (-6.43%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 26787 bytes -1467 bytes (-5.19%)
LZMA2 (Wikipedia) xz xz -9 27536 bytes -718 bytes (-2.54%)
ZSTD (Wikipedia) zstd zstd -19 27984 bytes -270 bytes (-0.96%)

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