Firefox Developer Tools
Chrome DevTools
Typescript
Fiddler
replit
SplineTech Javascript Debugger
Flow Type
Insomnia REST
HTTP Debugger
Surge for Mac
Charles Proxy
Weer
James
HTTP Headers
HTTP Toolkit
mitmproxy
HTTP Debugger is a professional HTTP sniffer and analyzer for developers.
You can use HTTP Debugger to debug HTTP API calls to a back-end and between back-ends.
HTTP Debugger is very easy of use, with clean UI, and short ramp-up time.
It's not a proxy, and does not produce network issues!
HTTP DebuggerChrome DevTools - Get started with Google Chrome's built-in web developer tools.
Surge for Mac - Advanced Web Debugging Proxy for Mac & iOS
Typescript - TypeScript allows developers to compile a superset of JavaScript to plain JavaScript on any browser, host, or operating system.
Charles Proxy - HTTP proxy / HTTP monitor / Reverse Proxy
Fiddler - Fiddler is a debugging program for websites.
Weer - A HTTP protocol debugger with Chrome DevTools frontend interface