Charles

Charles is a web proxy (HTTP Proxy / HTTP Monitor) that runs on your own computer. Your web browser (or any other Internet application) is then configured to access the Internet through Charles, and Charles is then able to record and display for you all of the data that is sent and received.

Features

• SSL proxying: view SSL requests and responses in plain text
• Bandwidth throttling to simulate slower Internet connections including latency
• AJAX debugging : view XML and JSON requests and responses as a tree or as text
• AMF: view the contents of Flash Remoting / Flex Remoting messages as a tree
• Repeat requests to test back-end changes
• Edit requests to test different inputs
• Breakpoints to intercept and edit requests or responses
• Validate recorded HTML, CSS, and RSS/atom responses using the W3C validator

Note: Version 4 is a paid upgrade from previous versions. Upgrade information can be found here.

Minor Improvements:

• Mirror tool now supports partial responses (so you can mirror some streaming video)
• JSON export option added to Web Interface
• Recognize WebSocket upgrades on an existing connection

Bug Fixes:

• Support IPv6 literal addresses in Location host fields
• Fix hung requests that occurred in some rare, but consistent circumstances
• Fix fault in multipart form viewer when expanding file details
• Improve SSL connection establishment when the first protocol offered is rejected aggressively
• Fix right-click issue on macOS on computers with a trackpad, where popup menus would appear then disappear