WebSiteSniffer Alternatives

Wireshark is the world's foremost network protocol analyzer. It lets you capture and interactively browse the traffic running on a computer network. It is the de facto (and often de jure) standard across many industries and educational institutions.

GNU Wget is a free software package for retrieving files using HTTP(S) and FTP, the most widely-used Internet protocols. It is a non-interactive command line tool, so it may easily be called from scripts, cron jobs, terminals without X-Windows support, etc.

Fiddler is a Web Debugging Proxy which logs all HTTP(S) traffic between your computer and the Internet. Fiddler allows you to inspect all HTTP(S) traffic, set breakpoints, and "fiddle" with incoming or outgoing data.

Cyotek WebCopy is a free tool for copying full or partial websites locally onto your harddisk for offline viewing.

tcpdump is a common packet analyzer that runs under the command line. It allows the user to intercept and display TCP/IP and other packets being transmitted or received over a network to which the computer is attached.

MetaProducts Offline Explorer is a Windows XP/2003/2008/Vista/7/8/10 program that allows you to download an unlimited number of your favorite Web and FTP sites for later offline viewing, editing or browsing.

macOS application that automatically downloads websites from the Internet. It does this by asynchronously copying the site's webpages, images, PDFs, style sheets, and other files to your local hard drive, duplicating the site's directory structure.

grab-site is a crawler for archiving websites to WARC files. It includes a dashboard for monitoring multiple crawls, and supports changing URL ignore patterns during the crawl.

Download all the HTML source code and assets of any website.

WebCopier is an easy-to-use website mirror utility. It allows to download entire Web sites, store them locally and view them later, at users' convenience.