The next PPT — edit AI-generated HTML decks in your browser, then export pixel-perfect PPTX / PDF in one click.
English | 简体中文
Your AI tool already writes beautiful
deck.html. NextPPT is the missing last mile: click to fix one word, drag to rearrange, ship it as a slide — without another prompt round.
Demo placeholder · drop a
demo.gif into docs/assets/
"Let the AI write the slides as HTML" is a real workflow now. Cursor / Claude / ChatGPT nail Flex layouts, KaTeX, Mermaid and custom fonts — and still struggle with native PowerPoint XML. So people ship a gorgeous deck.html instead of fighting Keynote.
Then the same three problems show up:
- Last-minute edits hurt. Your advisor says "change that one line on slide 16." You're back in the AI tool: prompt, wait, diff, save. Once is fine; the tenth time you want to scream.
- Projectors want PPT/PDF. Schools require
.pptx, clients want.pdf, and raw HTML on a projector loves to drop fonts or stall on the network. - Privacy anxiety is real. Thesis defenses, client proposals, internal decks — people don't want to upload any of it to an online editor.
NextPPT does one thing well: take HTML you already have, let you point-and-edit it in the browser, and export high-fidelity PPT/PDF — without your files ever leaving your machine.
It is not an AI slide generator, not another DSL like reveal.js / Slidev, not a cloud editor. It's a pair of scissors for AI decks.
pnpm install
pnpm dev
# web → http://localhost:5173 api → http://localhost:3000In a Chromium browser (Chrome / Edge / Brave / Arc):
- Open — pick a folder with your
deck.htmland assets, drag in a single.html, or try the built-in sample on the home page. Open a file that isn't a valid deck and you get a clear inline hint that links straight to the guide's prompt — no silent failure. - Edit — Edit mode: click text, tweak fonts/colors in the panel, double-click to type inline. Move mode: drag, resize, and reorder layers (bring to front / send to back, forward / backward one step) like PowerPoint — no code. Entering Move mode auto-detects draggable elements, so anything is movable on the first try.
- Export — PPTX or PDF, up to 5120×2880, page ranges supported. Done.
Edits auto-save to disk (debounced) with timestamped snapshots in .hds-backup/.
New here? Open the Guide from the nav bar — a three-step generate / edit / export walkthrough with a copy-ready prompt, switchable between English and Chinese.
A browser SPA handles all editing; a stateless service only appears at export time and forgets everything when it's done.
flowchart LR
ai["AI outputs deck.html"] --> open["Open in browser"]
open --> edit["Edit / Move modes"]
edit --> save["Auto-save local + backup"]
edit --> export["One-click export"]
export --> svc["Puppeteer worker"]
svc --> file["PPTX / PDF"]
- Editing uses the File System Access API — read, edit, write, never upload.
- Export screenshots each slide at high DPI, builds PPTX/PDF, wipes temp files. No database, no object storage.
- Point-and-edit. Any
<section class="slide">deck works. Property panel for font, weight, color, align, decoration, links, images. - Edit / Move modes. Edit = text only, calm. Move = freeform drag, resize, and full layer ordering (to front / to back, forward / backward one step) — like native PPT. Move mode auto-extracts draggable elements, so you never have to "wake up" a layer first.
- Mermaid, live. Raw Mermaid source renders in the editor and stays crisp in export.
- High-fidelity export. Image-based PPTX / PDF that matches your HTML. Up to 5120×2880; single page or ranges.
- Guided onboarding. A built-in guide page walks generate → edit → export with a copy-ready AI prompt; opening a malformed file surfaces an inline hint that points you there instead of failing silently.
- Bilingual UI. Chinese / English across the site, guide, and editor, switchable anywhere.
- Two ways in. Folder mode (sibling images + backups) or single self-contained HTML (base64 images).
- Local-first. Files stay on disk; the server only touches content for the seconds it takes to export.
| Browser | Folder mode | Single-file mode |
|---|---|---|
| Chrome / Edge / Brave / Arc / Opera | Yes | Yes |
| Safari / Firefox | Planned (ZIP fallback) | Planned |
During editing, your data never leaves your machine. Export sends content to a temp worker for a few dozen seconds, then deletes it. Nothing persisted, nothing trained on.
- docs/ROADMAP.md — what's next
- docs/GROWTH.md — positioning and channels
- docs/PRD.md · docs/TRD.md — product & technical specs
Built for people who live this workflow. Issues and PRs welcome — if it saves you one painful night before a talk, that's already worth it.