WhatWeb identifies websites. Its goal is to answer the question, “What is that Website?”. WhatWeb recognises web technologies including content management systems (CMS), blogging platforms, statistic/analytics packages, JavaScript libraries, web servers, and embedded devices. WhatWeb has over 1700 plugins, each to recognise something different. WhatWeb also identifies version numbers, email addresses, account IDs, web framework modules, SQL errors, and more.

• Over 1700 plugins
• Control the trade off between speed/stealth and reliability
• Plugins include example URLs
• Performance tuning. Control how many websites to scan concurrently.
• Multiple log formats: Brief (greppable), Verbose (human readable), XML, JSON, MagicTree, RubyObject, MongoDB, SQL, and ElasticSearch.
• Proxy support including TOR
• Custom HTTP headers
• Basic HTTP authentication
• Control over webpage redirection
• Nmap-style IP ranges
• Fuzzy matching
• Result certainty awareness
• Custom plugins defined on the command line

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 WhatWeb - Next generation web scanner.
 Version 0.4.7 by Andrew Horton aka urbanadventurer from Security-Assessment.com
 Homepage: http://www.morningstarsecurity.com/research/whatweb
 
 Usage: whatweb [options] 
 
 TARGET SELECTION:
                   Enter URLs, filenames or nmap-format IP ranges.
                         Use /dev/stdin to pipe HTML directly
   --input-file=FILE, -i Identify URLs found in FILE, eg. -i /dev/stdin
   --url-prefix          Add a prefix to target URLs
   --url-suffix          Add a suffix to target URLs
   --url-pattern         Insert the targets into a URL. Requires --input-file,
                         eg. www.example.com/%insert%/robots.txt
   --example-urls, -e    Add example URLs for each selected plugin to the target
                         list. By default will add example URLs for all plugins.
 
 AGGRESSION LEVELS:
   --aggression, -a=LEVEL The aggression level controls the trade-off between
                         speed/stealth and reliability. Default: 1
                         Aggression levels are:
         1 (Passive)     Make one HTTP request per target. Except for redirects.
         2 (Polite)      Reserved for future use
         3 (Aggressive)  Triggers aggressive plugin functions only when a
                         plugin matches passively.
         4 (Heavy)       Trigger aggressive functions for all plugins. Guess a
                         lot of URLs like Nikto.
 
 HTTP OPTIONS:
   --user-agent, -U=AGENT Identify as AGENT instead of WhatWeb/0.4.7.
   --user, -u= HTTP basic authentication
   --header, -H          Add an HTTP header. eg "Foo:Bar". Specifying a default
                         header will replace it. Specifying an empty value, eg.
                         "User-Agent:" will remove the header.
   --follow-redirect=WHEN Control when to follow redirects. WHEN may be `never',
                         `http-only', `meta-only', `same-site', `same-domain'
                         or `always'. Default: always
   --max-redirects=NUM   Maximum number of contiguous redirects. Default: 10
 
 SPIDERING:
   --recursion, -r       Follow links recursively. Only follow links under the
                         path Default: off
   --depth, -d           Maximum recursion depth. Default: 10
   --max-links, -m       Maximum number of links to follow on one page
                         Default: 250
   --spider-skip-extensions Redefine extensions to skip.
                         Default: zip,gz,tar,jpg,exe,png,pdf
 
 PROXY:
   --proxy               <hostname[:port]> Set proxy hostname and port
                         Default: 8080
   --proxy-user           Set proxy user and password
 
 PLUGINS:
   --plugins, -p         Comma delimited set of selected plugins. Default is all.
                         Each element can be a directory, file or plugin name and
                         can optionally have a modifier, eg. + or -
                         Examples: +/tmp/moo.rb,+/tmp/foo.rb
                         title,md5,+./plugins-disabled/
                         ./plugins-disabled,-md5
    -p + is a shortcut for -p +plugins-disabled
   --list-plugins, -l    List the plugins
   --info-plugins, -I    Display information for all plugins. Optionally search
                         with keywords in a comma delimited list.
   --custom-plugin       Define a custom plugin called Custom-Plugin,
                         Examples: ":text=>'powered by abc'"
                         ":regexp=>/powered[ ]?by ab[0-9]/"
                         ":ghdb=>'intitle:abc \"powered by abc\"'"
                         ":md5=>'8666257030b94d3bdb46e05945f60b42'"
                         "{:text=>'powered by abc'},{:regexp=>/abc [ ]?1/i}"
 
 LOGGING & OUTPUT:
   --verbose, -v         Increase verbosity, use twice for plugin development.
   --colour,--color=WHEN control whether colour is used. WHEN may be `never',
                         `always', or `auto'
   --quiet, -q  Do not display brief logging to STDOUT
   --log-brief=FILE      Log brief, one-line output
   --log-verbose=FILE    Log verbose output
   --log-xml=FILE        Log XML format
   --log-json=FILE       Log JSON format
   --log-json-verbose=FILE Log JSON Verbose format
   --log-magictree=FILE  Log MagicTree XML format
   --log-object=FILE     Log Ruby object inspection format
   --log-mongo-database  Name of the MongoDB database
   --log-mongo-collection Name of the MongoDB collection. Default: whatweb
   --log-mongo-host      MongoDB hostname or IP address. Default: 0.0.0.0
   --log-mongo-username  MongoDB username. Default: nil
   --log-mongo-password  MongoDB password. Default: nil
   --log-errors=FILE     Log errors
 
 PERFORMANCE & STABILITY:
   --max-threads, -t     Number of simultaneous threads. Default: 25.
   --open-timeout        Time in seconds. Default: 15
   --read-timeout        Time in seconds. Default: 30
   --wait=SECONDS        Wait SECONDS between connections
                         This is useful when using a single thread.
 
 HELP & MISCELLANEOUS:
   --help, -h            This help
   --debug               Raise errors in plugins
   --version             Display version information. (WhatWeb 0.4.7)
 
 EXAMPLE USAGE:
   whatweb example.com
   whatweb -v example.com
   whatweb -a 3 example.com
   whatweb 192.168.1.0/24