Presenton (https://presenton.ai/ — documentation: https://github.com/presenton/presenton) generates presentations from an imported statement or document.

Open source, it can be installed and then used offline (with API key) on a server or on a computer.
The online “Playground” allows generation without installation. Fine management of the instruction with number of slides, language (French supported), tone, type of images (AI or bank), type of narration, table of contents, title page…
A library of 8 templates is available.
The themes are customizable.

It is possible to import your own PPTX or PDF file to extract colors and layouts.

An editor allows you to edit individually generated elements, add slides, and switch to full-screen presentation mode.

In the “Playground” version, 50 free credits per month with 1 credit per slide consumed only when exporting and 1 credit for importing a model.