====== Features ======

Charles helps to debug a wide range of web problems. Below is a list of Charles' features:

  * Cookies are shown in the HTTP headers, so you can see exactly what cookies you are sending and receiving.
  *Every request and response is recorded in Charles. Redirects that are often too quick to see when testing with a web browser can be seen in Charles. Requests from applications other than your web browser (such as Flash movies) can also be seen.
  * Request and response sizes are shown in Charles, so you can see how big each request was.
  * Assets loaded from an HTML page are recorded so that you can see how many images etc are loaded by a page, and where from.
  * All files can be viewed, including JavaScript files, CSS files, HTML files etc.
  * [[Mirror]] all responses to disk, recording your session.
  * [[Blacklist]] sites so that requests are blocked.
  * See the results of caching by seeing cached responses (304 Not Modified), and requests containing last modified dates (IfModifiedSince).
  * Disable caching by removing cache related headers from requests and responses as they pass through Charles, ensuring that you are always requesting the latest file.
  * See whether a cache has served your request by looking for cache-hit HTTP headers.
  * [[SSL debugging|View encrypted HTTPS traffic in plain text]]. Enables you to view requests and responses in plain text even when communicating with an SSL secured web server.
  * Reveal unexpected requests, such as typos and 404s.
  * View requested images.
  * [[Bandwidth Throttle]] your web connection to a specified bytes/second speed, and millisecond latency. This enables you to simulate modem conditions on a high speed internet connection (bandwidth simulator)
  * [[Spoof DNS]] name to ip mappings so that you can test a domain name before it has gone live. Very useful for testing your virtual hosting.
  * [[Export to CSV]] all of the summary data captured by Charles for analysis and reporting in Excel
  * [[Reverse proxy]] creates ports on the localhost that act as regular HTTP servers, but forward all requests to a specified web server.
  * [[HTTP 1.1]] support - including keep-alive, chunking and content-encodings including gzip, compress and deflate.
  * External proxy support - configure an proxy for Charles to use to access the Internet
  * [[NTLM authentication]] support (Windows NT Challenge Response Authentication / Integrated Windows Authentication)
  * Automatic configuration of Windows Internet Proxy settings.
  * Search all headers and bodies for keywords.
  * [[Port forwarding]] support, allows any protocol to be forwarded by Charles and debugged.
  * [[Unicode support|Unicode]] and other charset encoding/decoding support.
  * [[AJAX debugging]] (Asynchronous Javascript and XML) and XMLHTTP debugging
  * AMF parsing to help debug [[Flash Remoting]]
  * Firefox proxy autoconfiguration
  * [[Automatic Update Checking]]
Charles reveals everything that takes place on the web. See the screenshots page for examples of the above.