The Best Slides-as-Code Presentation Tools for Developers

If you’ve ever built a presentation in PowerPoint, Google Slides, Keynote, or similar tools, you know the manual work: dragging boxes, designing every slide by hand, nudging images pixel by pixel, losing formatting on every paste, and no version control. You can git diff your source code — but not your slides.

Slides-as-code is the alternative: write presentations in Markdown, in your IDE, version-controlled, CI/CD-friendly, and shareable as static HTML. In the age of agents, that matters even more — the format is text-based and structured, so agents can draft decks with near-zero error rate while I focus on the narrative.

Before building a slide system into my Astro site, I evaluated every serious option in this space. This post is that comparison — the criteria, the tools, and the tradeoffs that led to my pick.

What Makes a Good Slides-as-Code Tool?

Before diving into tools, here’s what I was evaluating:

• Markdown support — Can I write slides in .md files without leaving my editor?
• Code highlighting — Syntax highlighting with stepped reveal (highlight lines progressively)?
• Math support — KaTeX or MathJax for equations?
• Theming — CSS-based themes that match my site’s design system?
• PDF export — For conferences that require PDF submissions?
• Framework dependency — Does it force me into React, Vue, or another runtime?
• Embeddability — Can I embed the output inside an existing website (not just as a standalone app)?
• Git-friendliness — Is the source format diffable, mergeable, reviewable?
• Active maintenance — Is the project still maintained?
• Learning curve — How fast can I go from zero to first deck?

Reveal.js — The Veteran

revealjs.com · ~71k GitHub stars · Vanilla JavaScript · v6.0 (March 2026)

Reveal.js is the grandfather of web-based presentations. Created by Hakim El Hattab almost 15 years ago, it remains the most starred HTML presentation framework by a wide margin.

What makes it stand out:

• Zero framework dependency. Vanilla JS. Works with Astro, Next, Svelte, plain HTML — anything that serves a webpage.
• Plugin ecosystem. Markdown, syntax highlighting, math (KaTeX/MathJax), speaker notes, multiplexing, search — all as composable plugins.
• Fragment system. The most expressive click-to-reveal system: fade-up, fade-in-then-out, grow, shrink, highlight-red, strike, with explicit ordering via data-fragment-index.
• Auto-animate. Magic-move transitions between slides via data-id matching.
• Code highlight with stepped reveal. Write ```js [1-3|5|7-9] ` and Reveal steps through highlighted line ranges on each click.
• Fullscreen backgrounds. Color, image, video (with loop/muted), or even a live iframe as a slide background.
• PDF export. Append ?print-pdf to any deck URL and Chrome prints it perfectly.
• v6. The latest release brought Vite-based builds, TypeScript types included in the package, and an official React wrapper.

The tradeoff: Compared to other tools, Reveal asks for a bit more initial setup and has a slightly steeper learning curve. Slides are HTML <section> elements (with an optional Markdown plugin), so you’re closer to the metal. The upside is total control.

Best for: Highly customized presentations, portfolio showcases, embedding inside existing websites, teams that need plugin extensibility without framework lock-in.

Slidev — The DX King

sli.dev · ~46k GitHub stars · Vue 3 + Vite

Slidev is what happens when someone says “what if the IDE experience for slides was as good as for code?” It’s purpose-built for developers presenting technical content, and it shows.

What makes it stand out:

• Vue components inline. Drop <Tweet id="..." />, <Youtube id="..." />, or any Vue component directly into your Markdown slides.
• Shiki code highlighting with animations. Line-by-line highlighting that animates, not just toggles.
• Monaco editor. Embed a live VS Code-like editor in your slides for live coding demos.
• Built-in recording. Record your presentation with webcam overlay and export as video.
• Mermaid diagrams. Native support for sequence diagrams, flowcharts, etc.
• Themes as npm packages. Community themes installable via npm install.
• LLM-friendly syntax. The Markdown format is so structured that AI assistants generate valid Slidev decks almost every time.

The tradeoff: Slidev is a standalone Vue/Vite application, not a library you embed. You run slidev build and get a static SPA. If you want slides inside an existing non-Vue website (like an Astro or Next.js site), you’d need to maintain a separate build pipeline, lose your host site’s Content Collections, i18n system, theme toggle, SEO/AEO infrastructure, and sitemap integration.

Best for: Developer conference talks where the deck IS the product. Teams already on Vue. Speakers who want recording and live coding built in.

Marp — The Minimalist

marp.app · ~3.5k stars (CLI) · Marpit framework · CommonMark

Marp is the tool that proves constraints breed clarity. Write CommonMark Markdown. Add a YAML frontmatter for theme and pagination. Use --- to separate slides. Done.

What makes it stand out:

• Flattest learning curve. If you know Markdown, you know 95% of Marp.
• VS Code extension. Live preview as you type, with hot reload.
• PPTX export. The only tool on this list that exports directly to PowerPoint.
• CI/CD integration. Marp + GitHub Actions = slides auto-rendered on every push. Treat decks as build artifacts alongside your documentation.
• Near-zero LLM error rate. The format is so minimal that AI tools almost never produce invalid Marp Markdown.
• Morphing animations (v4+). Named elements can animate between slides — a lighter version of Reveal’s auto-animate.

The tradeoff: Limited interactivity. No fragments (progressive reveal on click). No live code demos. The styling system is powerful (full CSS) but the defaults are presentation-grade, not web-experience-grade. If you need “wow factor,” Marp might feel too restrained.

Best for: Quick Markdown-to-PDF slide decks. Sprint review decks. Documentation-as-slides. Teams that want slides in their CI pipeline with zero ceremony.

Spectacle — The React Native

formidable.com/open-source/spectacle · ~10k GitHub stars · React 18+

Spectacle takes the opposite approach from Marp: if you know React, you already know Spectacle. Slides are JSX components.

What makes it stand out:

• Full React ecosystem. Any React library works in your slides — charts, maps, data viz, interactive demos.
• Live code preview. Show running code alongside its source, editable in real-time.
• Markdown support. Via MarkdownSlideSet component, for those who prefer writing over JSX.
• Multiple starter templates. One-page HTML, Markdown, Vite, or webpack.
• Active maintenance. v10.2.3 (Oct 2025), 180+ contributors over 10 years.

The tradeoff: Requires React 18+. The bundle is heavier than Reveal or Marp. If your site isn’t React, adding Spectacle means adding a second framework runtime. The JSX-first authoring model is powerful but has a steeper learning curve for non-React developers.

Best for: React teams who want slides that feel like their product code. Presentations with heavy interactive elements or data visualization.

Honorable Mentions

Impress.js (~38k stars) — The Prezi-like experience in vanilla JS. Slides positioned in 3D space with CSS transforms. Spectacular for spatial storytelling, but niche. HTML-only authoring (no Markdown), reduced maintenance activity.

WebSlides (~6k stars) — Beautiful defaults with 40+ reusable components. Horizontal and vertical navigation. Less actively maintained but still functional. HTML authoring required.

Pandoc + Beamer — The LaTeX pipeline. Write Markdown, convert to Beamer PDF via Pandoc. Ideal for academia. Not web-native.

Online and AI-Powered Platforms

Not everything needs to be code. Here’s when cloud platforms make more sense:

Platform	Strength	Best For
Gamma	Generate full decks from text prompts	Quick AI-generated presentations for meetings
Pitch	Real-time collaborative editing	Team pitch decks, investor presentations
Beautiful.ai	AI layout engine that auto-arranges content	Design-heavy decks without a designer
slides.com	WYSIWYG editor built on Reveal.js by the same author	Reveal-style decks without writing code
Google Slides	Universal compatibility, easy sharing	Corporate environments, cross-team collaboration
Canva	Massive template library	Non-technical presenters, social media content

These platforms solve different problems than slides-as-code. If your audience is investors or a non-technical team, Google Slides or Pitch might be the pragmatic choice. If your audience is developers and your content is code, the slides-as-code tools above are what you want.

The Full Comparison

Feature	Reveal.js	Slidev	Marp	Spectacle
Technology	Vanilla JS	Vue 3/Vite	Node.js	React 18+
Markdown	Plugin	Native	Native	Component
Framework dep.	None	Vue	None	React
Code highlight	Stepped reveal	Shiki animations	Basic	Live preview
Math	KaTeX/MathJax	KaTeX	MathJax/KaTeX	Limited
Fragments	Rich	Basic	No	Basic
Auto-animate	Yes	Yes	Morphing (v4)	No
PDF export	?print-pdf	Yes	Native (+ PPTX)	Yes
Embeddable	Yes	No (standalone)	Limited	No (standalone)
VS Code ext.	No	No	Yes	No
Recording	No	Built-in	No	No
GitHub stars	~71k	~46k	~3.5k	~10k
Learning curve	Medium	Medium (Vue helps)	Low	Medium (React)

My Pick — and Why (Slides-as-Code Inside My Own Site)

I wanted to integrate a slides-as-code system into my own site for my tech talks — to have xergioalex.com itself host the decks, not an external service. That’s why I chose Reveal.js.

The deciding factor wasn’t that Reveal has the best DX (Slidev wins there) or the flattest learning curve (Marp wins). It was embeddability.

I needed slides to live inside my Astro website — as first-class content, with the same multilingual support, the same theme system, the same SEO and AEO infrastructure as my blog posts. Reveal is vanilla JS that I can initialize in a Svelte component, inside an Astro layout, importing CSS only on deck pages. No second framework runtime. No separate build pipeline.

In the next post in this series, I’ll walk through exactly how I built it: a three-type deck catalog with discriminated-union schemas, build-time Markdown rendering, asset isolation, AEO twins, and live dark/light theme sync.

Resources

• Reveal.js — Official site
• Slidev — Official site
• Marp — Official site
• Spectacle — Official site
• Impress.js — Official site
• Gamma — AI presentation platform
• Pitch — Collaborative presentations