For several hours Tuesday, a significant portion of the internet was unavailable in Cloudflare's worst outage since 2019.

Cloudflare said on Tuesday morning that it was "all hands on deck" trying to work out the cause of the outage.

The company behind the outage, Cloudflare, is responsible for providing a range of services for websites such as performance enhancement capabilities, security and application development tools through its global network. But on Tuesday, Nov. 18, the company’s outage took major websites such as X, Spotify and ChatGPT down with it.

Infrastructure company Cloudflare has been hit with what it calls "widespread 500 errors, [with] Dashboard and API also failing."

A massive Cloudfare outage led to issues on X, Spotify, ChatGPT, Mumsnet and Bet365 earlier today - problems remain despite a fix being announced

An outage at internet infrastructure giant Cloudflare took down several big websites and services, including ChatGPT, Claude, Spotify, and X.

What is Cloudflare? Why is NJ Transit, X (Twitter) and other major apps down? See the latest, what's going on.