What packages do you support?

We use TeX Live 2023 for new projects and copies of existing projects, which provides about 4000 packages, including:

• Figures with pstricks and TikZ. Here are some examples.
• Bibliographies with bibtex and biblatex. Here are some examples.
• Packages, such as fontspec that require XeLaTeX or LuaLaTeX for unicode and font support.

For more details please see this blog post.

Existing projects continue to use the TeX Live image that was current at the time the project was created—this protects against adverse affects, such as incompatibilities, that could be introduced by future package updates.

To update the TeX Live version used by an existing project you can make a copy of that project which automatically updates the copied project to use the Overleaf's most recent version of TeX Live. Alternatively, the cloned (copied) project can be configured manually to use a different version of TeX Live.

Also note that you can upload .sty and .cls files for other packages, for example those from CTAN.