Try it here: https://tzarnal.github.io/Opal/

This is a no-datastore, client-side paste service with syntax highlighting. It turns text into LZMA-compressed, Base64-encoded URLs.

The is a fork of the original Topaz Paste with syntax highlighting added

For those who wish to syntax highlight original existing Topaz links this userscript will automatically redirect Topaz to Opal.

Because the entire paste is inside the URL, there's no risk of losing your data because a 3rd-party service vanished or deleted old pastes. If you have the URL, you have the pasted data.

For example, here's the service hosting (a version of) its own HTML.

Uses LZMA-JS (© 2016 Nathan Rugg nmrugg@gmail.com).

Uses Highlightjs Copyright (c) 2006, Ivan Sagalaev.