Charles

Charles

Charles is an HTTP proxy / HTTP monitor / Reverse Proxy that enables a developer to view all of the HTTP and SSL / HTTPS traffic between their machine and the Internet. This includes requests, responses and the HTTP headers (which contain the cookies and caching information).
Charles image
proxy http https monitor reverse-proxy

Charles: HTTP Proxy & Monitor

Charles enables developers to view all of the HTTP and SSL/HTTPS traffic between their machine and the Internet, including requests, responses, and HTTP headers.

What is Charles?

Charles is an HTTP proxy / HTTP monitor / Reverse Proxy that enables a developer to view all of the HTTP and SSL / HTTPS traffic between their machine and the Internet. This includes requests, responses and the HTTP headers (which contain the cookies and caching information).

Key features of Charles include:

  • HTTP proxy - Forward and monitor all HTTP traffic between your computer and the Internet. SSL proxy - Charles decrypts HTTPS traffic for inspection.
  • Rewrite HTTP requests and responses or even script entirely new ones.
  • Throttling - Simulate slow networks by throttling HTTP latency.
  • Device Proxy - Use Charles from an Android or iOS device.
  • Maps Remote - Remotely map requests from phones or tablets connected over WiFi.
  • SSL Proxying - Charles decrypts HTTPS traffic for inspection while keeping the secure SSL tunnel between your browser and the server intact.
  • Recording - Record and replay browser sessions.
  • Sequence Diagram - Visualise requests and responses as an interactive sequence diagram.
  • Rewrite - Rewrite requests and responses, or write entirely new ones.
  • Headers - View full request and response details including headers, parameters and cookies.
  • Images - View images requested by your browser.
  • Minification - Charles automatically minifies responses from web sites so that you see them as your browser does.

In summary, Charles is an indispensable tool for web developers and testers to debug traffic, inspect HTTP headers, set breakpoints, and much more during development, testing, and troubleshooting of web apps and sites.

Charles Features

Features

  1. HTTP proxy
  2. HTTP monitor
  3. Reverse proxy
  4. View HTTP/HTTPS traffic
  5. View requests
  6. View responses
  7. View HTTP headers
  8. View cookies
  9. View caching information

Pricing

  • Free
  • Open Source

Pros

Debug HTTP/HTTPS connections

Inspect traffic between machine and internet

Identify performance issues

Troubleshoot network requests

Cons

Steep learning curve

Manual configuration required

Extra overhead for all HTTP traffic

Potential privacy concerns


The Best Charles Alternatives

Top Development and Debugging & Testing and other similar apps like Charles


Fiddler icon

Fiddler

Fiddler is a free web debugging proxy developed by Telerik that logs all HTTP(S) traffic between your computer and the Internet. It sits between your computer and the servers you communicate with acting as a proxy that allows you to intercept, inspect, modify, and debug traffic.Some key features of Fiddler...
Fiddler image
Burp Suite icon

Burp Suite

Burp Suite is an integrated platform for performing security testing of web applications. It includes a suite of tools used together to map, discover, scan, exploit, and fix web application security issues.Some key features of Burp Suite include:An Interception Proxy that lets you inspect and modify traffic between your browser...
Burp Suite image
Proxyman icon

Proxyman

Proxyman is a feature-rich proxy manager and tester for macOS. It makes it easy to capture, inspect, modify, replay and mock HTTP(S) requests and responses between your computer applications and the internet.With Proxyman you can:Create, organize, enable/disable and edit proxies with a user-friendly GUIModify requests and responses on the fly...
Proxyman image
HTTP Debugger icon

HTTP Debugger

An HTTP debugger is a developer tool that enables debugging, testing and inspection of HTTP requests/responses between a client and server. It provides detailed visibility into all aspects of HTTP communication including:HTTP headers like user-agent, accept types, encoding etc.Query parameters, form data and request payloadsResponse status codes, headers, cookies and...
HTTP Debugger image
HTTP Toolkit icon

HTTP Toolkit

HTTP Toolkit is an open-source web debugging proxy and HTTP inspection tool for debugging and testing web applications and APIs. It allows developers to intercept, inspect, modify, mock, and replay HTTP requests and responses as they pass between a web browser, application, or other HTTP client and the server.Key features...
HTTP Toolkit image
Mitmproxy icon

Mitmproxy

mitmproxy is an open-source interactive HTTPS proxy developed in Python. It allows users to intercept, inspect, modify, and replay web traffic flows. Some key features of mitmproxy include:Works as a HTTP/HTTPS proxy server that sits between your traffic source and destinationProvides an interactive console interface to inspect and manipulate traffic...
Mitmproxy image
Requestly icon

Requestly

Requestly is a useful web debugging proxy and browser extension that allows you to modify network requests and responses on the fly. It can be installed as a browser extension on Chrome, Firefox, and Opera and as a standalone app on Mac, Windows, and Linux.Some key features of Requestly include:Modify...
Requestly image
NetworkMiner icon

NetworkMiner

NetworkMiner is an open source network forensic analysis tool used to analyze network traffic captures (PCAP files). It can detect operating systems, sessions, hostnames, open ports, passwords and more from network traffic using deep packet inspection techniques.Some of the key features of NetworkMiner include:Detecting operating systems and versions from network...
NetworkMiner image
OWASP Zed Attack Proxy (ZAP) icon

OWASP Zed Attack Proxy (ZAP)

OWASP Zed Attack Proxy (ZAP) is an open-source web application security scanner used to find vulnerabilities in web applications. It provides automated and manual tools to scan APIs, access control weaknesses, injection flaws, cross-site scripting, insecure configuration issues, and more.Key features of ZAP include:Automated scanner detects vulnerabilities like SQL injection,...
OWASP Zed Attack Proxy (ZAP) image
PaladinVPN icon

PaladinVPN

PaladinVPN is a virtual private network (VPN) service designed to provide online privacy and security. It uses advanced encryption protocols to create a secure tunnel for your internet traffic, protecting it from prying eyes and hiding your IP address from websites and third parties.When connected to PaladinVPN, your internet traffic...
PaladinVPN image
Live HTTP Headers (Chrome) icon

Live HTTP Headers (Chrome)

Live HTTP Headers is a free Chrome extension that provides an interactive interface for viewing all HTTP requests and responses as they happen within the browser. It works by intercepting and logging all network traffic between the browser and servers.Some key features of Live HTTP Headers include:Displays all HTTP headers...
Live HTTP Headers (Chrome) image
LightProxy icon

LightProxy

LightProxy is a free, open-source proxy server software designed to enable anonymous web browsing and access control. As a proxy server, LightProxy acts as an intermediary between users and the internet, allowing for masking of IP addresses and encryption of traffic.Some key features of LightProxy include:Lightweight and fast - optimized...
LightProxy image
Surge for Mac icon

Surge for Mac

Surge for Mac is a developer tool focused on static web projects. It allows web developers and designers to build, test, preview, and publish static websites and web apps directly on their local computer.Some key features of Surge for Mac include:Built-in, intuitive web server - Makes sites hosted with Surge...
Surge for Mac image
HttpFox icon

HttpFox

HttpFox is a useful Firefox add-on for web developers and anyone who wants to analyze and debug HTTP requests and responses. It captures all HTTP traffic between the browser and server, allowing you to inspect headers, cookies, caching information, and more.Some key features of HttpFox include:Inspecting all parts of an...
HttpFox image
HTTPScoop icon

HTTPScoop

HTTPScoop is an open-source web debugging proxy built for debugging and testing modern web applications that use HTTPS. It allows developers to intercept, inspect, and modify HTTPS traffic from their web apps or sites.Some key features of HTTPScoop include:Works as a reverse proxy to decrypt, analyze, and re-encrypt HTTPS traffic...
HTTP Analyzer icon

HTTP Analyzer

HTTP Analyzer is a versatile software tool used for inspecting, editing, tracking, debugging, and replaying HTTP traffic. It provides a graphical user interface that allows developers and testers to deeply analyze network requests and responses, gain insight into API calls, troubleshoot connectivity and performance issues, and optimize web and mobile...
HTTP Analyzer image
PolarProxy icon

PolarProxy

PolarProxy is an open-source proxy software designed to provide robust privacy and anonymity protection while browsing the internet. It works by routing the user's traffic through multiple proxy servers, making it very difficult to trace the originating IP address and location.Some key features of PolarProxy include:Support for chaining multiple proxy...
PolarProxy image
WebScarab icon

WebScarab

WebScarab is an open source web application security testing tool developed by OWASP. It provides an interactive environment to intercept, inspect, modify and replay HTTP and HTTPS requests and responses between a browser and web server. WebScarab allows security testers and developers to identify and exploit security vulnerabilities in web...
WebScarab image
Apptalk.ninja icon

Apptalk.ninja

apptalk.ninja is a comprehensive suite of communication and collaboration tools designed to help teams work better together. At its core, it provides messaging, video conferencing, and file sharing capabilities to facilitate real-time discussion and content sharing.Beyond basic communication features, apptalk.ninja includes more advanced capabilities for task and project management. Teams...
Proxie icon

Proxie

Proxie is a privacy-oriented web browser launched in 2021. It is designed to give users more control over their privacy online by blocking online trackers and ads by default. Some key features of Proxie include:Built-in ad and tracker blocking that works automatically without extensions or settings changes neededEncrypted proxy connections...
Proxie image
Camilla Proxy icon

Camilla Proxy

Camilla Proxy is an open-source proxy software designed to provide online anonymity and bypass internet censorship. It operates by routing a user's internet traffic through multiple intermediate proxy servers, encrypting the data flow at each hop. This makes it very difficult to trace the traffic back to the original user.Some...
Weer icon

Weer

Weer is a weather app tailored for outdoor adventurers, travelers, and nature lovers. It sets itself apart from traditional weather apps by focusing on hyperlocal weather conditions using data from a crowdsourced network of personal weather stations.Instead of relying solely on airport and government weather stations located miles away, Weer...
Andiparos icon

Andiparos

Andiparos is an open-source vector graphics editor for Windows, macOS and Linux. It provides users with tools to create and edit 2D vector graphics including logos, illustrations, icons, diagrams, charts and more.Some of the key features of Andiparos include:Vector drawing and editing tools like pen, pencil, brushes, shape tools, etc.Color...
Andiparos image
Uthrottle icon

Uthrottle

Uthrottle is a free, open-source internet traffic shaper and bandwidth limiter application for Windows. It gives users control over their internet bandwidth usage by allowing them to set limits for both overall usage as well as on a per-application basis.Some key features of Uthrottle include:Set global download/upload speed limits for...
Uthrottle image
Proxy.app icon

Proxy.app

Proxy.app is a feature-rich proxy manager developed specifically for the macOS platform. It provides an intuitive graphical user interface that allows users to easily manage multiple proxy configurations.Some key features of Proxy.app include:Create unlimited proxy configurations with support for protocols like HTTP, SOCKS5, HTTPS, and moreEasily switch between different proxy...
Proxy.app image
Slowy icon

Slowy

Slowy is a free and open-source cross-platform media player application designed with simplicity in mind. Originally developed as a minimalist audio player, Slowy has evolved to support a wide range of media codecs and formats including support for audio formats like MP3, FLAC, WAV as well as support for common...
Slowy image
HoneyProxy icon

HoneyProxy

HoneyProxy is an open-source proxy server software designed to facilitate monitoring, analysis, and access control of web traffic. It functions as a man-in-the-middle proxy that intercepts communication between clients and web servers to log, inspect, and modify requests and responses.Key features of HoneyProxy include:Interception of all HTTP and HTTPS requests...
HoneyProxy image
Cellist icon

Cellist

Cellist is a cloud-based test automation platform used by development and QA teams to test native, hybrid and web apps across real iOS, Android and desktop browsers at scale. Some key capabilities and benefits include:Supports UI, functional, visual, accessibility, performance testing through a single unified platform.Provides access to a large,...
Cellist image