reveal.js
Leading#1 in Open sourcehigh confidence
The 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.Our read
Why it ranks #1
The most-starred dedicated presentation framework at about 72k GitHub stars, with long-running adoption, active maintenance and a large plugin/theme ecosystem.Here is the catch
requires web-development skills for deep customization
browser rendering and print-to-PDF can vary
does not create native editable PowerPoint files
Does this well
mature, highly customizable web presentation standard
large ecosystem and excellent documentation
works well for technical talks and interactive demos
Pricing
Checked by hand on 2026-07-23. Prices in this category change often — if this looks wrong, it probably is.
Key features
HTML and Markdown slide authoringNested slides, notes and overview modeCode highlighting, math and auto-animatePDF export and plugin API
Sources we read
Quick facts
More in this area
The rest of the Open source column.- 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.
- 4remarkA simple in-browser, Markdown-driven slideshow (~13k stars) for people comfortable with HTML/CSS. A long-standing lightweight option.
- 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.