html-ppt

html-ppt — HTML PPT Studio

Author professional HTML presentations as static files. One theme file = one look. One layout file = one page type. One animation class = one entry effect. All pages share a token-based design system in assets/base.css.

Install

npx skills add https://github.com/lewislulu/html-ppt-skill

One command, no build. Pure static HTML/CSS/JS with only CDN webfonts.

What the skill gives you

• 36 themes (assets/themes/*.css) — minimal-white, editorial-serif, soft-pastel, sharp-mono, arctic-cool, sunset-warm, catppuccin-latte/mocha, dracula, tokyo-night, nord, solarized-light, gruvbox-dark, rose-pine, neo-brutalism, glassmorphism, bauhaus, swiss-grid, terminal-green, xiaohongshu-white, rainbow-gradient, aurora, blueprint, memphis-pop, cyberpunk-neon, y2k-chrome, retro-tv, japanese-minimal, vaporwave, midcentury, corporate-clean, academic-paper, news-broadcast, pitch-deck-vc, magazine-bold, engineering-whiteprint
• 15 full-deck templates (templates/full-decks/<name>/) — complete multi-slide decks with scoped .tpl-<name> CSS. 8 extracted from real-world decks (xhs-white-editorial, graphify-dark-graph, knowledge-arch-blueprint, hermes-cyber-terminal, obsidian-claude-gradient, testing-safety-alert, xhs-pastel-card, dir-key-nav-minimal), 7 scenario scaffolds (pitch-deck, product-launch, tech-sharing, weekly-report, xhs-post 3:4, course-module, presenter-mode-reveal — 演讲者模式专用)
• 31 layouts (templates/single-page/*.html) with realistic demo data
• 27 CSS animations (assets/animations/animations.css) via data-anim
• 20 canvas FX animations (assets/animations/fx/*.js) via data-fx — particle-burst, confetti-cannon, firework, starfield, matrix-rain, knowledge-graph (force-directed), neural-net (pulses), constellation, orbit-ring, galaxy-swirl, word-cascade, letter-explode, chain-react, magnetic-field, data-stream, gradient-blob, sparkle-trail, shockwave, typewriter-multi, counter-explosion
• Keyboard runtime (assets/runtime.js) — arrows, T (theme), A (anim), F/O, S (presenter mode: magnetic-card popup with CURRENT / NEXT / SCRIPT / TIMER cards), N (notes drawer), R (reset timer in presenter)
• FX runtime (assets/animations/fx-runtime.js) — auto-inits [data-fx] on slide enter, cleans up on leave
• Showcase decks for themes / layouts / animations / full-decks gallery
• Managed Chromium render script for PNG export

When to use

Use when the user asks for any kind of slide-based output or wants to turn text/notes into a presentable deck. Prefer this over building from scratch.

🎤 Presenter Mode (演讲者模式 + 逐字稿)

If the user mentions any of: 演讲 / 分享 / 讲稿 / 逐字稿 / speaker notes / presenter view / 演讲者视图 / 提词器, or says things like "我要去给团队讲 xxx", "要做一场技术分享", "怕讲不流畅", "想要一份带逐字稿的 PPT" — use the presenter-mode-reveal full-deck template and write 150–300 words of 逐字稿 in each slide's <aside class="notes">.

See references/presenter-mode.md for the full authoring guide including the 3 rules of speaker script writing:

1. 不是讲稿，是提示信号 — 加粗核心词 + 过渡句独立成段
2. 每页 150–300 字 — 2–3 分钟/页的节奏
3. 用口语，不用书面语 — "因此"→"所以"，"该方案"→"这个方案"

All full-deck templates support the S key presenter mode (it's built into runtime.js). S opens a new popup window with 4 magnetic cards:

• 🔵 CURRENT — pixel-perfect iframe preview of the current slide
• 🟣 NEXT — pixel-perfect iframe preview of the next slide
• 🟠 SPEAKER SCRIPT — large-font 逐字稿 (scrollable)
• 🟢 TIMER — elapsed time + slide counter + prev/next/reset buttons

Each card is draggable by its header and resizable by the bottom-right corner handle. Card positions/sizes persist to localStorage per deck. A "Reset layout" button restores the default arrangement.

Why the previews are pixel-perfect: each preview is an <iframe> that loads the actual deck HTML with a ?preview=N query param; runtime.js detects this and renders only slide N with no chrome. So the preview uses the same CSS, theme, fonts, and viewport as the audience view — colors and layout are guaranteed identical.

Smooth navigation: on slide change, the presenter window sends postMessage({type:'preview-goto', idx:N}) to each iframe. The iframe just toggles .is-active between slides — no reload, no flicker. The two windows also stay in sync via BroadcastChannel.

Only presenter-mode-reveal is designed from the ground up around the feature with proper example 逐字稿 on every slide.

Keyboard in presenter window: ← → navigate (syncs audience) · R reset timer · Esc close popup. Keyboard in audience window: S open presenter · T cycle theme · ← → navigate (syncs presenter) · F fullscreen · O overview.

Before you author anything — ALWAYS ask or recommend

Do not start writing slides until you understand three things. Either ask the user directly, or — if they already handed you rich content — propose a tasteful default and confirm.

1. Content & audience. What's the deck about, how many slides, who's watching (engineers / execs / 小红书读者 / 学生 / VC)?
2. Style / theme. Which of the 36 themes fits? If unsure, recommend 2-3 candidates based on tone:
   • Business / investor pitch → pitch-deck-vc, corporate-clean, swiss-grid
   • Tech sharing / engineering → tokyo-night, dracula, catppuccin-mocha, terminal-green, blueprint
   • 小红书图文 → xiaohongshu-white, soft-pastel, rainbow-gradient, magazine-bold
   • Academic / report → academic-paper, editorial-serif, minimal-white
   • Edgy / cyber / launch → cyberpunk-neon, vaporwave, y2k-chrome, neo-brutalism
3. Starting point. One of the 14 full-deck templates, or scratch? Point to the closest templates/full-decks/<name>/ and ask if it fits. If the user's content suggests something obvious (e.g. "我要做产品发布会" → product-launch), propose it confidently instead of asking blindly.

A good opening message looks like:

我可以给你做这份 PPT！先确认三件事：

1. 大致内容 / 页数 / 观众是谁？
2. 风格偏好？我建议从这 3 个主题里选一个：tokyo-night（技术分享默认好看）、xiaohongshu-white（小红书风）、corporate-clean（正式汇报）。
3. 要不要用我现成的 tech-sharing 全 deck 模板打底？

Only after those are clear, scaffold the deck and start writing.

Quick start

1. Scaffold a new deck. From the repo root:

   ./scripts/new-deck.sh my-talk
   open examples/my-talk/index.html
   

2. Pick a theme. Open the deck and press T to cycle. Or hard-code it:

   <link rel="stylesheet" id="theme-link" href="../assets/themes/aurora.css">
   

   Catalog in references/themes.md.
3. Pick layouts. Copy <section class="slide">...</section> blocks out of files in templates/single-page/ into your deck. Replace the demo data. Catalog in references/layouts.md.
4. Add animations. Put data-anim="fade-up" (or class="anim-fade-up") on any element. On <ul>/grids, use anim-stagger-list for sequenced reveals. For canvas FX, use <div data-fx="knowledge-graph">...</div> and include <script src="../assets/animations/fx-runtime.js"></script>. Catalog in references/animations.md.
5. Use a full-deck template. Copy templates/full-decks/<name>/ into examples/my-talk/ as a starting point. Each folder is self-contained with scoped CSS. Catalog in references/full-decks.md and gallery at templates/full-decks-index.html.
6. Render to PNG.

   ./scripts/render.sh templates/theme-showcase.html       # one shot
   ./scripts/render.sh examples/my-talk/index.html 12      # 12 slides
   

Authoring rules (important)

• Always start from a template. Don't author slides from scratch — copy the closest layout from templates/single-page/ first, then replace content.
• Use tokens, not literal colors. Every color, radius, shadow should come from CSS variables defined in assets/base.css and overridden by a theme. Good: color: var(--text-1). Bad: color: #111.
• Don't invent new layout files. Prefer composing existing ones. Only add a new templates/single-page/*.html if none of the 30 fit.
• Respect chrome slots. .deck-header, .deck-footer, .slide-number and the progress bar are provided by assets/base.css + runtime.js.
• Keyboard-first. Always include <script src="../assets/runtime.js"></script> so the deck supports ← → / T / A / F / S / O / hash deep-links.
• One .slide per logical page. runtime.js makes .slide.is-active visible; all others are hidden.
• Supply notes. Wrap speaker notes in <div class="notes">…</div> inside each slide. Press S to open the overlay.
• NEVER put presenter-only text on the slide itself. Descriptive text like "这一页展示了……" or "Speaker: 这里可以补充……" or small explanatory captions aimed at the presenter MUST go inside <div class="notes">, NOT as visible <p> / <span> elements on the slide. The .notes class is display:none by default — it only appears in the S overlay. Slides should contain ONLY audience-facing content (titles, bullet points, data, charts, images).

Writing guide

See references/authoring-guide.md for a step-by-step walkthrough: file structure, naming, how to transform an outline into a deck, how to choose layouts and themes per audience, how to do a Chinese + English deck, and how to export.

Catalogs (load when needed)

• references/themes.md — all 36 themes with when-to-use.
• references/layouts.md — all 31 layout types.
• references/animations.md — 27 CSS + 20 canvas FX animations.
• references/full-decks.md — all 15 full-deck templates.
• references/presenter-mode.md — 演讲者模式 + 逐字稿编写指南（技术分享/演讲必看）.
• references/authoring-guide.md — full workflow.

File structure

html-ppt/
├── SKILL.md                 (this file)
├── references/              (detailed catalogs, load as needed)
├── assets/
│   ├── base.css             (tokens + primitives — do not edit per deck)
│   ├── fonts.css            (webfont imports)
│   ├── runtime.js           (keyboard + presenter + overview + theme cycle)
│   ├── themes/*.css         (36 token overrides, one per theme)
│   └── animations/
│       ├── animations.css   (27 named CSS entry animations)
│       ├── fx-runtime.js    (auto-init [data-fx] on slide enter)
│       └── fx/*.js          (20 canvas FX modules: particles/graph/fireworks…)
├── templates/
│   ├── deck.html                  (minimal 6-slide starter)
│   ├── theme-showcase.html        (36 slides, iframe-isolated per theme)
│   ├── layout-showcase.html       (iframe tour of all 31 layouts)
│   ├── animation-showcase.html    (20 FX + 27 CSS animation slides)
│   ├── full-decks-index.html      (gallery of all 14 full-deck templates)
│   ├── full-decks/<name>/         (14 scoped multi-slide deck templates)
│   └── single-page/*.html         (31 layout files with demo data)
├── scripts/
│   ├── new-deck.sh                (scaffold a deck from deck.html)
│   └── render.sh                  (managed Chromium → PNG)
└── examples/demo-deck/            (complete working deck)

Rendering to PNG

scripts/render.sh uses Playwright's managed Chromium renderer. Do not call the user's installed Google Chrome directly for PNG export, especially on macOS desktop builds where Crashpad/profile permissions can abort Chrome before a screenshot is written. If the managed renderer fails once, surface that error and stop instead of retrying alternate Chrome launch commands.

For multi-slide capture, runtime.js exposes #/N deep-links, and render.sh iterates 1..N.

./scripts/render.sh templates/single-page/kpi-grid.html        # single page
./scripts/render.sh examples/demo-deck/index.html 8 out-dir    # 8 slides, custom dir

Keyboard cheat sheet

←  →  Space  PgUp  PgDn  Home  End    navigate
F                                       fullscreen
S                                       open presenter window (magnetic cards: current/next/script/timer)
N                                       quick notes drawer (bottom overlay)
R                                       reset timer (in presenter window)
?preview=N                              URL param — force preview-only mode (single slide, no chrome)
O                                       slide overview grid
T                                       cycle themes (reads data-themes attr)
A                                       cycle demo animation on current slide
#/N in URL                              deep-link to slide N
Esc                                     close all overlays

License & author

MIT. Copyright (c) 2026 lewis <sudolewis@gmail.com>.