Choose a version:
38% The original file has 49341 bytes (48.2k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 18694 bytes (18.3k, 38%).

After GZIP compression these minified files vary in size:
gzip -6 (default)
  9577 bytes (9.4k)
local copy
gzip -9
  9577 bytes (9.4k)
local copy
libdeflate -12
  9389 bytes (9.2k)
local copy
7zip -mx=9 -tgzip
  9304 bytes (9.1k)
local copy
pigz -11 -n
  9218 bytes (9.0k)
local copy
kzip -s0 -rn -b2
  9206 bytes (9.0k)
local copy
Zopfli
  9204 bytes (9.0k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/jquery/jquery-1.0.2.pack.js

You will automatically get the smallest jQuery 1.0.2 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

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 --mls2048 --bsr25 --lazy --ohh

(found November 23, 2015)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 2048  --mls2048
block splitting recursion 25  --bsr25
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

Verify file integrity

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

MD5:
curl --silent --compressed http://code.jquery.com/jquery-1.0.2.pack.js --location | md5sum
83b2449323c6534a0fa9b0a2fd113726  -
curl --silent --compressed http://minime.stephan-brumme.com/files/jquery/jquery-1.0.2.pack.zopfli.js.gz | md5sum
83b2449323c6534a0fa9b0a2fd113726  -

SHA1:
curl --silent --compressed http://code.jquery.com/jquery-1.0.2.pack.js --location | sha1sum
84b1514a01def3bc0b52f6fa03d0d9fa349bef72  -
curl --silent --compressed http://minime.stephan-brumme.com/files/jquery/jquery-1.0.2.pack.zopfli.js.gz | sha1sum
84b1514a01def3bc0b52f6fa03d0d9fa349bef72  -

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
9204 bytes -1 byte zopfli --i100000 --mls2048 --bsr25 --lazy --ohh November 23, 2015 @ 08:34
9205 bytes -3 bytes zopfli --i1000 --mls512 --bsr7 --lazy --ohh September 16, 2015 @ 18:55
9208 bytes -1 byte zopfli --i1000 --mls64 --bsr16 --lazy --ohh September 16, 2015 @ 18:53
9209 bytes -3 bytes zopfli --i1000 --mls64 --bsr10 --lazy --ohh September 16, 2015 @ 18:52
9212 bytes zopfli --i100 --mls128 --bsr9 --lazy --ohh September 11, 2015 @ 11:14

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 @ 14:37.

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
9224 9225 9218 9220 9224 9223 9223 9213 9213 9219 9224 9233 9238 9225 9224
9214 9217 9219 9207 9209 9209 9220 9208 9225 9236 9246 9260 9249 9246 9245
9213 9214 9216 9208 9208 9209 9216 9211 9207 9206 9215 9216 9222 9221 9221
9210 9208 9206 9207 9207 9206 9211 9207 9204 9208 9216 9224 9236 9223 9223
9222 9222 9223 9223 9230 9225 9220 9210 9215 9207 9219 9226 9229 9224 9222
9209 9209 9212 9206 9207 9206 9207 9207 9207 9207 9216 9224 9225 9225 9225
9210 9208 9208 9206 9206 9206 9206 9207 9207 9207 9217 9224 9221 9222 9222
9208 9209 9213 9206 9207 9209 9207 9207 9207 9208 9215 9219 9226 9222 9223
9209 9209 9206 9214 9207 9209 9208 9207 9207 9208 9217 9224 9229 9223 9223
9210 9210 9210 9208 9206 9206 9207 9208 9207 9208 9211 9231 9222 9224 9222
9210 9209 9206 9206 9205 9206 9207 9207 9208 9208 9216 9226 9228 9220 9220
9208 9206 9209 9207 9205 9207 9209 9207 9207 9207 9216 9220 9223 9221 9222
9210 9209 9209 9207 9207 9207 9209 9207 9206 9207 9216 9226 9221 9221 9221
9209 9209 9208 9207 9206 9212 9207 9207 9208 9208 9216 9225 9225 9222 9222
9209 9213 9207 9207 9206 9208 9209 9208 9207 9207 9221 9222 9222 9225 9224
9209 9209 9206 9206 9208 9207 9207 9207 9207 9211 9215 9222 9227 9221 9221
9209 9209 9208 9207 9208 9207 9209 9208 9207 9208 9204 9227 9227 9223 9223
9210 9209 9209 9206 9207 9210 9209 9207 9206 9207 9204 9227 9223 9221 9221
9209 9209 9206 9206 9206 9206 9208 9207 9207 9210 9217 9220 9227 9222 9222
9210 9210 9208 9206 9206 9207 9208 9207 9207 9207 9216 9219 9227 9221 9221
9209 9207 9206 9207 9206 9206 9208 9207 9207 9208 9204 9226 9224 9221 9221
9210 9210 9209 9206 9204 9206 9209 9207 9207 9207 9216 9224 9228 9222 9224
9210 9209 9209 9207 9208 9208 9210 9207 9207 9206 9215 9222 9226 9222 9223

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 9210 bytes 100%
1,000 9205 bytes -5 bytes 100%
10,000 9205 bytes 100%
100,000 9204 bytes -1 byte 2.32%
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
9206 bytes +2 bytes (+0.02%)
9385 bytes +181 bytes (+1.97%) +179 bytes
9206 bytes +2 bytes (+0.02%)
9213 bytes +9 bytes (+0.10%) +7 bytes
9235 bytes +31 bytes (+0.34%) +29 bytes
9272 bytes +68 bytes (+0.74%) +66 bytes
9311 bytes +107 bytes (+1.16%) +105 bytes
9348 bytes +144 bytes (+1.56%) +142 bytes
9382 bytes +178 bytes (+1.93%) +176 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
Brotli (Wikipedia) brotli brotli -q 11 8522 bytes -682 bytes (-7.41%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 8859 bytes -345 bytes (-3.75%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 8938 bytes -266 bytes (-2.89%)
ZPAQ (Wikipedia) zpaq zpaq -method 69 9090 bytes -114 bytes (-1.24%)
LZMA2 (Wikipedia) xz xz -9 9092 bytes -112 bytes (-1.22%)
ZSTD (Wikipedia) zstd zstd -19 9378 bytes +174 bytes (+1.89%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 9644 bytes +440 bytes (+4.78%)

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 2018.
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