remark
Leading#4 in Open sourcehigh confidence
A simple in-browser, Markdown-driven slideshow (~13k stars) for people comfortable with HTML/CSS. A long-standing lightweight option.Our read
Why it ranks #4
A long-standing lightweight Markdown slideshow project at about 13k GitHub stars, but its last repository push was in 2024 and current momentum is limited.Here is the catch
maintenance activity is low
fewer modern export, animation and component features
no native PowerPoint editing workflow
Does this well
minimal setup and a very small conceptual surface
plain Markdown makes decks easy to version
works from a single HTML page
Pricing
Checked by hand on 2026-07-23. Prices in this category change often — if this looks wrong, it probably is.
Key features
Markdown-to-slides in the browserPresenter mode and notesSyntax highlightingCustom CSS and ratio controls
Sources we read
Quick facts
More in this area
The rest of the Open source column.- 1reveal.jsThe de-facto standard open-source HTML presentation framework (~72k stars) — Markdown authoring, PDF export, speaker notes, LaTeX and auto-animate. The most-adopted tool in the entire category.
- 2SlidevThe modern developer favorite (~47.8k stars): Markdown-driven decks powered by Vite/Vue 3 with live coding, Mermaid, KaTeX and PPTX/PDF/PNG export. Also ships its own official Agent Skill (see below).
- 3impress.jsPrezi-style CSS3 3D and zoom transitions with full HTML/CSS/JS control (~38.2k stars). Very high adoption, though less actively maintained than reveal.js and Slidev.
- 5SpectacleA React/JSX-based presentation library (~10.1k stars) from Formidable Labs, strong for live code demos and the React ecosystem; actively maintained.
- 6python-pptxThe foundational Python library for programmatically generating and reading .pptx (~3.5k stars). Star count is modest but real-world adoption is enormous — it is the engine the Anthropic pptx skill and most PPTX tooling depend on, so it ranks above higher-starred JS tools on adoption depth.
- 7Marp (marp-cli)A mature Markdown-to-slides ecosystem (~3.7k stars for the CLI, plus a popular VS Code extension) exporting HTML/PDF/PPTX. Lower star count than the leaders but a well-adopted Markdown-native toolchain.