Enter the URL of the website you want to test at low bandwidths, then select the bandwidth you want to simulate

Plus how to run a web application when the JavaScript itself is disabled*.

If you do web development, you’ve probably heard of REST. But if you’re like me, you usually just pretend to know what it is, and nod politely when someone asks you if what you’re making is RESTful. I use HTTP, err, that means it’s RESTful right?

It takes a 'snapshot' of a webpage that will always be online even if the original page disappears.
This can be useful if you want to take a 'snapshot' a page which could change soon: price list, job offer, real estate listing, drunk blog post, ...

IPFS is a peer-to-peer distributed file system that seeks to connect all computing devices with the same system of files. In some ways, IPFS is similar to the Web, but IPFS could be seen as a single BitTorrent swarm, exchanging objects within one Git repository. In other words, IPFS provides a high throughput content-addressed block storage model, with content-addressed hyperlinks. This forms a generalized Merkle DAG, a data structure upon which one can build versioned file systems, blockchains, and even a Permanent Web. IPFS combines a distributed hashtable, an incentivized block exchange, and a self-certifying namespace. IPFS has no single point of failure, and nodes do not need to trust each other.

Quickjack allows you to easily perform clickjacking, or steal "clicks" from users on many websites, forcing the user to unknowingly click buttons or links
https://www.owasp.org/index.php/Clickjacking_Defense_Cheat_Sheet

Package managers like Composer for PHP and NPM for Node have become essential tools for simplifying a developer’s life. A package manager is a tool for keeping track of what you’ve installed, as well as installing and upgrading packages. They also check for dependencies and compatibility. Bower is a package manager for the web.

Render beautiful pixel perfect representations of websites in your terminal

Perform the same request against two HTTP servers and diff the results.

Silicon is a high performance, middleware oriented, C++14 http web framework. It brings to C++ the high expressive power of other web frameworks based on dynamic languages without introducing run-time overhead. Its compile-time static metaprogramming paradigm allows to match the performances of servers written in C.

A collection of useful .htaccess snippets.