The crawl archive for November/December 2021 is now available! The data was crawled Nov 26 – Dec 9 and contains 2.5 billion web pages or 280 TiB of uncompressed content. It includes page captures of 1.2 billion new URLs, not visited in any of our prior crawls.

Improvements

The column url_host_name_reversed was added to the columnar index. It holds the host name in reverse domain name notation (com.example.www) which is more efficient to query. In order to make use of the new column please use the updated table schema. On Amazon Athena you need to recreate table by running the latest table creation statement. Further details are found in the corresponding pull request.

The columnar index is now built using Spark version 3.2.0 and Parquet MR 1.12.1 – these upgrades allow us to go for further improvements next year. Let us know if you observe any incompatibilities using this index to query data from the Nov/Dec 2021 crawl.

The crawler is now based on Tika 2.1.0 for detection of MIME/content types and character sets used to encode HTML documents.

Archive Location and Download

The November/December crawl archive is located in the commoncrawl bucket at crawl-data/CC-MAIN-2021-49/.

To assist with exploring and using the dataset, we provide gzipped files which list all segments, WARC, WAT and WET files.
By simply adding either s3://commoncrawl/ or https://data.commoncrawl.org/ to each line, you end up with the S3 and HTTP paths respectively.

	File List	#Files	Total Size Compressed (TiB)
Segments	CC-MAIN-2021-49/segment.paths.gz	100
WARC files	CC-MAIN-2021-49/warc.paths.gz	64000	68.66
WAT files	CC-MAIN-2021-49/wat.paths.gz	64000	16.66
WET files	CC-MAIN-2021-49/wet.paths.gz	64000	7.18
Robots.txt files	CC-MAIN-2021-49/robotstxt.paths.gz	64000	0.15
Non-200 responses files	CC-MAIN-2021-49/non200responses.paths.gz	64000	2.29
URL index files	CC-MAIN-2021-49/cc-index.paths.gz	302	0.2

The Common Crawl URL Index for this crawl is available at: https://index.commoncrawl.org/CC-MAIN-2021-49/. Also the columnar index has been updated to contain this crawl.

Please donate to Common Crawl if you appreciate our free datasets! We’re also seeking corporate sponsors to partner with Common Crawl for our non-profit work in open data. Please contact [email protected] for sponsorship information.

The crawl archive for October 2021 is now available! The data was crawled Oct 15 – 28 and contains 3.3 billion web pages or 360 TiB of uncompressed content. It includes page captures of 1.3 billion new URLs, not visited in any of our prior crawls.

Archive Location and Download

The October crawl archive is located in the commoncrawl bucket at crawl-data/CC-MAIN-2021-43/.

To assist with exploring and using the dataset, we provide gzipped files which list all segments, WARC, WAT and WET files.
By simply adding either s3://commoncrawl/ or https://data.commoncrawl.org/ to each line, you end up with the S3 and HTTP paths respectively.

	File List	#Files	Total Size Compressed (TiB)
Segments	CC-MAIN-2021-43/segment.paths.gz	100
WARC files	CC-MAIN-2021-43/warc.paths.gz	72000	85.11
WAT files	CC-MAIN-2021-43/wat.paths.gz	72000	22.42
WET files	CC-MAIN-2021-43/wet.paths.gz	72000	9.79
Robots.txt files	CC-MAIN-2021-43/robotstxt.paths.gz	72000	0.15
Non-200 responses files	CC-MAIN-2021-43/non200responses.paths.gz	72000	2.11
URL index files	CC-MAIN-2021-43/cc-index.paths.gz	302	0.25

The Common Crawl URL Index for this crawl is available at: https://index.commoncrawl.org/CC-MAIN-2021-43/. Also the columnar index has been updated to contain this crawl.

Please donate to Common Crawl if you appreciate our free datasets! We’re also seeking corporate sponsors to partner with Common Crawl for our non-profit work in open data. Please contact [email protected] for sponsorship information.

The crawl archive for September 2021 is now available! The data was crawled Sept 16 – 29 and contains 2.95 billion web pages or 310 TiB of uncompressed content. It includes page captures of 1.3 billion new URLs, not visited in any of our prior crawls.

Archive Location and Download

The September crawl archive is located in the commoncrawl bucket at crawl-data/CC-MAIN-2021-39/.

To assist with exploring and using the dataset, we provide gzipped files which list all segments, WARC, WAT and WET files.
By simply adding either s3://commoncrawl/ or https://data.commoncrawl.org/ to each line, you end up with the S3 and HTTP paths respectively.

	File List	#Files	Total Size Compressed (TiB)
Segments	CC-MAIN-2021-39/segment.paths.gz	100
WARC files	CC-MAIN-2021-39/warc.paths.gz	72000	72.16
WAT files	CC-MAIN-2021-39/wat.paths.gz	72000	19.81
WET files	CC-MAIN-2021-39/wet.paths.gz	72000	8.7
Robots.txt files	CC-MAIN-2021-39/robotstxt.paths.gz	72000	0.15
Non-200 responses files	CC-MAIN-2021-39/non200responses.paths.gz	72000	2.19
URL index files	CC-MAIN-2021-39/cc-index.paths.gz	302	0.22

The Common Crawl URL Index for this crawl is available at: https://index.commoncrawl.org/CC-MAIN-2021-39/. Also the columnar index has been updated to contain this crawl.

Please donate to Common Crawl if you appreciate our free datasets! We’re also seeking corporate sponsors to partner with Common Crawl for our non-profit work in open data. Please contact [email protected] for sponsorship information.

The crawl archive for June 2021 is now available! The data was crawled June 12 – 25 and contains 2.45 billion web pages or 260 TiB of uncompressed content. It includes page captures of 1.3 billion new URLs, not visited in any of our prior crawls.

Archive Location and Download

The June crawl archive is located in the commoncrawl bucket at crawl-data/CC-MAIN-2021-25/.

To assist with exploring and using the dataset, we provide gzipped files which list all segments, WARC, WAT and WET files.
By simply adding either s3://commoncrawl/ or https://data.commoncrawl.org/ to each line, you end up with the S3 and HTTP paths respectively.

	File List	#Files	Total Size Compressed (TiB)
Segments	CC-MAIN-2021-25/segment.paths.gz	100
WARC files	CC-MAIN-2021-25/warc.paths.gz	64000	57.9
WAT files	CC-MAIN-2021-25/wat.paths.gz	64000	16.54
WET files	CC-MAIN-2021-25/wet.paths.gz	64000	7.24
Robots.txt files	CC-MAIN-2021-25/robotstxt.paths.gz	64000	0.16
Non-200 responses files	CC-MAIN-2021-25/non200responses.paths.gz	64000	1.76
URL index files	CC-MAIN-2021-25/cc-index.paths.gz	302	0.19

The Common Crawl URL Index for this crawl is available at: https://index.commoncrawl.org/CC-MAIN-2021-25/. Also the columnar index has been updated to contain this crawl.

Please donate to Common Crawl if you appreciate our free datasets! We’re also seeking corporate sponsors to partner with Common Crawl for our non-profit work in open data. Please contact [email protected] for sponsorship information.

The crawl archive for May 2021 is now available! The data was crawled May 5 – 19 and contains 2.6 billion web pages or 280 TiB of uncompressed content. It includes page captures of 1.28 billion new URLs, not visited in any of our prior crawls.

Archive Location and Download

The May crawl archive is located in the commoncrawl bucket at crawl-data/CC-MAIN-2021-21/.

To assist with exploring and using the dataset, we provide gzipped files which list all segments, WARC, WAT and WET files.
By simply adding either s3://commoncrawl/ or https://data.commoncrawl.org/ to each line, you end up with the S3 and HTTP paths respectively.

	File List	#Files	Total Size Compressed (TiB)
Segments	CC-MAIN-2021-21/segment.paths.gz	100
WARC files	CC-MAIN-2021-21/warc.paths.gz	64000	66.17
WAT files	CC-MAIN-2021-21/wat.paths.gz	64000	17.61
WET files	CC-MAIN-2021-21/wet.paths.gz	64000	7.65
Robots.txt files	CC-MAIN-2021-21/robotstxt.paths.gz	64000	0.17
Non-200 responses files	CC-MAIN-2021-21/non200responses.paths.gz	64000	1.86
URL index files	CC-MAIN-2021-21/cc-index.paths.gz	302	0.2

The Common Crawl URL Index for this crawl is available at: https://index.commoncrawl.org/CC-MAIN-2021-21/. Also the columnar index has been updated to contain this crawl.

Please donate to Common Crawl if you appreciate our free datasets! We’re also seeking corporate sponsors to partner with Common Crawl for our non-profit work in open data. Please contact [email protected] for sponsorship information.

The crawl archive for April 2021 is now available! The data was crawled April 10 – 23 and contains 3.1 billion web pages or 320 TiB of uncompressed content. It includes page captures of 1.35 billion new URLs, not visited in any of our prior crawls.

Archive Location and Download

The April crawl archive is located in the commoncrawl bucket at crawl-data/CC-MAIN-2021-17/.

To assist with exploring and using the dataset, we provide gzipped files which list all segments, WARC, WAT and WET files.
By simply adding either s3://commoncrawl/ or https://data.commoncrawl.org/ to each line, you end up with the S3 and HTTP paths respectively.

	File List	#Files	Total Size Compressed (TiB)
Segments	CC-MAIN-2021-17/segment.paths.gz	100
WARC files	CC-MAIN-2021-17/warc.paths.gz	64000	69.78
WAT files	CC-MAIN-2021-17/wat.paths.gz	64000	21.05
WET files	CC-MAIN-2021-17/wet.paths.gz	64000	9.25
Robots.txt files	CC-MAIN-2021-17/robotstxt.paths.gz	64000	0.16
Non-200 responses files	CC-MAIN-2021-17/non200responses.paths.gz	64000	1.76
URL index files	CC-MAIN-2021-17/cc-index.paths.gz	302	0.23

The Common Crawl URL Index for this crawl is available at: https://index.commoncrawl.org/CC-MAIN-2021-17/. Also the columnar index has been updated to contain this crawl.

Please donate to Common Crawl if you appreciate our free datasets! We’re also seeking corporate sponsors to partner with Common Crawl for our non-profit work in open data. Please contact [email protected] for sponsorship information.

The crawl archive for February/March 2021 is now available! The data was crawled between February 24th and March 9th and contains 2.7 billion web pages or 280 TiB of uncompressed content. It includes page captures of 1.2 billion new URLs, not visited in any of our prior crawls.

Improvements and Fixes

The ISO639-3 code for the Hmong language was updated to "hmn" – the code "blu" used so far was already deprecated in 2008. Crawl archives prior to this crawl will still use the code "blu". More details about this update are found here.

Archive Location and Download

The February/March crawl archive is located in the commoncrawl bucket at crawl-data/CC-MAIN-2021-10/.

To assist with exploring and using the dataset, we provide gzipped files which list all segments, WARC, WAT and WET files.
By simply adding either s3://commoncrawl/ or https://data.commoncrawl.org/ to each line, you end up with the S3 and HTTP paths respectively.

	File List	#Files	Total Size Compressed (TiB)
Segments	CC-MAIN-2021-10/segment.paths.gz	100
WARC files	CC-MAIN-2021-10/warc.paths.gz	64000	62.51
WAT files	CC-MAIN-2021-10/wat.paths.gz	64000	18.44
WET files	CC-MAIN-2021-10/wet.paths.gz	64000	8.06
Robots.txt files	CC-MAIN-2021-10/robotstxt.paths.gz	64000	0.2
Non-200 responses files	CC-MAIN-2021-10/non200responses.paths.gz	64000	1.58
URL index files	CC-MAIN-2021-10/cc-index.paths.gz	302	0.21

The Common Crawl URL Index for this crawl is available at: https://index.commoncrawl.org/CC-MAIN-2021-10/. Also the columnar index has been updated to contain this crawl.

Please donate to Common Crawl if you appreciate our free datasets! We’re also seeking corporate sponsors to partner with Common Crawl for our non-profit work in open data. Please contact [email protected] for sponsorship information.

The crawl archive for October 2018 is now available! It contains 3.0 billion web pages and 240 TiB of uncompressed content, crawled between October 15th and 24th.

The October crawl contains 600 million new URLs, not contained in any crawl archive before. New URLs stem from:

• extracting and sampling URLs from sitemaps, RSS and Atom feeds if provided by hosts visited in prior crawls. Hosts are selected from the highest-ranking 60 million domains of the May/June/July 2018 webgraph data set
• a breadth-first side crawl within a maximum of 10 links (“hops”) away from the home pages of the top 40 million domains of the webgraph dataset
• a random sample of outlinks taken from WAT files of the September crawl
• 15 million external links sampled from Wikipedia data dumps

Please note that the character set detection was not fully working for the first 13 segments of the October crawl – about 15% of the page captures in these segments have no charset and language assigned. More information is found in the bug report.

Archive Location and Download

The October crawl archive is located in the commoncrawl bucket at crawl-data/CC-MAIN-2018-43/.

To assist with exploring and using the dataset, we provide gzipped files which list all segments, WARC, WAT and WET files.
By simply adding either s3://commoncrawl/ or https://data.commoncrawl.org/ to each line, you end up with the S3 and HTTP paths respectively.

	File List	#Files	Total Size Compressed (TiB)
Segments	CC-MAIN-2018-43/segment.paths.gz	100
WARC files	CC-MAIN-2018-43/warc.paths.gz	56000	58.84
WAT files	CC-MAIN-2018-43/wat.paths.gz	56000	19.34
WET files	CC-MAIN-2018-43/wet.paths.gz	56000	8.22
Robots.txt files	CC-MAIN-2018-43/robotstxt.paths.gz	56000	0.21
Non-200 responses files	CC-MAIN-2018-43/non200responses.paths.gz	56000	1.78
URL index files	CC-MAIN-2018-43/cc-index.paths.gz	302	0.23

The Common Crawl URL Index for this crawl is available at: https://index.commoncrawl.org/CC-MAIN-2018-43/. Also the columnar index has been updated to contain this crawl.

Please donate to Common Crawl if you appreciate our free datasets! We’re also seeking corporate sponsors to partner with Common Crawl for our non-profit work in open data. Please contact [email protected] for sponsorship information.

The crawl archive for April 2018 is now available! The archive is located in the commoncrawl bucket at crawl-data/CC-MAIN-2018-17/. It contains 3.1 billion web pages and 230 TiB of uncompressed content, crawled between April 19th and 27th.

The April crawl contains 625 million new URLs, not contained in any crawl archive before. New URLs are “mined” by

• extracting and sampling URLs from
  • sitemaps if provided by any of the highest-ranking 100 million hosts taken from the Nov/Dec/Jan 2017/2018 webgraph data set
  • RSS and Atom feeds (random sample of 1 million feeds taken from the March crawl data)
• a breadth-first side crawl within a maximum of 4 links (“hops”) away from the home pages of the top 40 million hosts or top 40 million domains of the webgraph dataset
• a random sample taken from WAT files of the March crawl

We took actions to reduce the amount of images unintentionally crawled: Although our crawler is focused to fetch HTML pages, there has always been a small amount (1-2%) of other document formats. We accept these – it’s a part of the web and these WARC records are useful to gain insights, e.g. to test PDF or Office document parsers at scale. However, because image links contained in sitemaps haven’t properly filtered out, the amount of images has grown during the last time and reached 2% in March 2018. As a result of filtering image links from sitemaps, the amount of images now has dropped to approx. 0.5%, cf. the MIME type statistics of the latest three monthly crawls.

To assist with exploring and using the dataset, we provide gzipped files which list all segments, WARC, WAT and WET files.
By simply adding either s3://commoncrawl/ or https://data.commoncrawl.org/ to each line, you end up with the S3 and HTTP paths respectively.

	File List	#Files	Total Size Compressed (TiB)
Segments	CC-MAIN-2018-17/segment.paths.gz	100
WARC files	CC-MAIN-2018-17/warc.paths.gz	64320	54.24
WAT files	CC-MAIN-2018-17/wat.paths.gz	64320	19.22
WET files	CC-MAIN-2018-17/wet.paths.gz	64320	8.4
Robots.txt files	CC-MAIN-2018-17/robotstxt.paths.gz	64320	0.2
Non-200 responses files	CC-MAIN-2018-17/non200responses.paths.gz	64320	1.58
URL index files	CC-MAIN-2018-17/cc-index.paths.gz	302	0.23

The Common Crawl URL Index for this crawl is available at: https://index.commoncrawl.org/CC-MAIN-2018-17/. Also the columnar index has been updated to contain this crawl.

Please donate to Common Crawl if you appreciate our free datasets! We’re also seeking corporate sponsors to partner with Common Crawl for our non-profit work in open data. Please contact [email protected] for sponsorship information.

The crawl archive for May 2017 is now available! The archive is located in the commoncrawl bucket at crawl-data/CC-MAIN-2017-22/. It contains 2.96 billion+ web pages and over 250 TiB of uncompressed content.

To improve coverage and freshness we used the top 25 million ranked hosts from the Feb/Mar/Apr 2017 webgraph data set and added about 500 million new URLs (not contained in any crawl archive before), of which:

• 330 million URLs were found by a side crawl within a maximum of 3 links (“hops”) away from the home pages of the top 25 million hosts;
• 160 million URLs are a random sample extracted from sitemaps (if provided by any of these 25 million hosts).

About 40% of the crawl archive’s 2.96 billion URLs overlap with the preceding April 2017 crawl.

The following changes have been made to WARC (also WAT and WET) files:

• the timestamp in WARC filenames now indicates the capture time (fetch time) of the WARC content (see details)
• WARC files and the URL index now contain the detected MIME type (based on the actual content) in addition to the “Content-Type” sent in the HTTP response (details).

To assist with exploring and using the dataset, we provide gzipped files which list all segments, WARC, WAT and WET files. By simply adding either s3://commoncrawl/ or https://data.commoncrawl.org/ to each line, you end up with the S3 and HTTP paths respectively.

	File List	#Files	Total Size Compressed (TiB)
Segments	CC-MAIN-2017-22/segment.paths.gz	100
WARC files	CC-MAIN-2017-22/warc.paths.gz	56788	57.98
WAT files	CC-MAIN-2017-22/wat.paths.gz	56788	19.87
WET files	CC-MAIN-2017-22/wet.paths.gz	56788	8.95
Robots.txt files	CC-MAIN-2017-22/robotstxt.paths.gz	56788	0.11
Non-200 responses	CC-MAIN-2017-22/non200responses.paths.gz	56788	1.38

The Common Crawl URL Index for this crawl is available at: https://index.commoncrawl.org/CC-MAIN-2017-22/. For more information on working with the URL index, please refer to the previous blog post or the Index Server API. There is also a command-line tool client for common use cases of the URL index.

Please donate to Common Crawl if you appreciate our free datasets! We’re also seeking corporate sponsors to partner with Common Crawl for our non-profit work in open data. Please contact [email protected] for sponsorship information.