An open-source slide studio that lives inside Codex

What it does

Codex Slides is a browser-first presentation studio that plugs into OpenAI Codex. You describe a deck, point it at a repo or some files, and the agent walks through research, outline, visual styling, and rendering—saving everything to disk as a durable project. The result exports to PDF or PPTX, with speaker notes intact.

The interesting bit

Every slide is rendered as a full visual canvas—image-native—so the tool trades PowerPoint editability for design fidelity and speed. Fast mode fans out page generation in parallel, letting a ten-slide deck land in about four to five minutes while the outline and style stay locked.

Key highlights

• 118 visual systems out of the box: 45 curated templates plus 73 community styles.
• 24 guided scenarios covering research decks, data stories, redesigns, and keynotes.
• Zero extra API keys; runs on your existing codex login and stores projects locally.
• Live presenter mode with a synchronized audience window and preserved speaker notes.
• Five aspect ratios and up to 4K render quality.

Caveats

• Exported PPTX files contain full-slide images, not individually editable shapes.
• Requires OpenAI Codex; it is not a standalone web app.

Verdict

Worth a look if you already live in Codex and need presentation-ready decks without juggling separate tools. Skip it if you need pixel-perfect PowerPoint editability or don’t use a coding agent.