Sites and apps similar to httptools.dev include HTTP Toolkit, which is open source with a free version. Other options are HTTP Debugger, Live HTTP Headers, URL Encoder and Decoder and RequestHeaders. In total there are five Web Debuggers like httptools.dev for Windows, Linux, Mac, Android and iPhone.
HTTP Toolkit is a beautiful, cross-platform & open-source HTTP(S) debugging proxy, analyzer & client, with built-in support for modern tools and automatic interception for clients from Docker to Android to iOS.
Spain
EU
HTTP Debugger captures and decrypts HTTP/HTTPS from any Windows app without proxy setup — HTTP/2, WebSocket, SSE, gRPC and localhost included. Edit and replay requests, modify traffic on the fly, and let an AI assistant read the session over the built-in MCP server.
The goal of this project is to adds information about the HTTP headers in three ways:
Canada
URL Encoder and Decoder is an online application for "url encode" or "url decode". Its unique feature which makes it different from the rest online encoders/decoders is that it keeps track of your recent works.
United States
Check HTTP Status Codes, SSL Validation, WWW Authentication, Redirects, Access Control, Cache Control, Content Encoding, Cookie Data and more...
