August 2017 Crawl Archive Now Available

The crawl archive for August 2017 is now available! The archive is located in the commoncrawl bucket at crawl-data/CC-MAIN-2017-34/. It contains 3.28 billion+ web pages and over 280 TiB of uncompressed content.

To improve coverage and freshness we used the top 50 million ranked hosts from the May/June/July 2017 webgraph data set and added over 800 million new URLs (not contained in any crawl archive before), of which

  • 300 million URLs were found by a side crawl within a maximum of 3 links (“hops”) away from the home pages of the top 40 million hosts;
  • 525 million URLs are a random sample extracted from sitemaps (if provided by any of the top 50 million hosts).

The following improvements affect the WAT and WET extraction:

  • improved spacing / word segmentation in WET extracts, see issue #13
  • extract URLs from JavaScript code in onClick attributes (issue #8)

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 to each line, you end up with the S3 and HTTP paths respectively.

File List#FilesTotal Size
Compressed (TiB)
WARC filesCC-MAIN-2017-34/warc.paths.gz7200065.14
WAT filesCC-MAIN-2017-34/wat.paths.gz7200022.18
WET filesCC-MAIN-2017-34/wet.paths.gz720009.81
Robots.txt filesCC-MAIN-2017-34/robotstxt.paths.gz720000.12
Non-200 responses filesCC-MAIN-2017-34/non200responses.paths.gz720001.49
URL index filesCC-MAIN-2017-34/cc-index.paths.gz3020.24

The Common Crawl URL Index for this crawl is available at: 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.

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