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The PowerPoint problem

Sending a .pptx is harder than it should be:
  • The recipient needs PowerPoint, Keynote, LibreOffice, or Google Slides installed (and not all of them render the file the same way).
  • Custom fonts silently fall back to defaults if the recipient doesn’t have them — the deck looks wrong on their machine.
  • Animations and transitions break across versions and across apps.
  • File size is heavy: 30 MB+ for a deck with images, multiplied by everyone you email it to.
  • The receiver has to download the file before seeing anything — friction at the worst possible moment.
Even Google Slides — which removes the install requirement — needs a Google account to view properly, breaks for users behind enterprise SSO walls, and doesn’t render well on mobile.

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Why HTML wins

HTML is the most portable visual format on the planet:
  • Every device has a browser. Phones, tablets, laptops, kiosks, smart TVs — if it can open a web page, it can open your deck.
  • No app to install. No PowerPoint license, no Keynote, no Google account, no Reveal.js viewer.
  • No font fallback. Web fonts (local or CDN) render identically for everyone.
  • No version drift. The browser is the runtime. There is no “PowerPoint 2019 vs 2024” issue.
  • One tap to open. A URL works on lock-screen previews, in chat threads, in email signatures, in QR codes.
  • Assets are first-class. Slideless accepts a folder with images, video, 3D models, shaders, and data files — same mental model as a static website. No inline-base64 gymnastics.

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Side-by-side

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What this means in practice

You give a prospect a URL. They tap it on their phone in a meeting room. The deck renders in landscape, fullscreen, with your fonts, your colors, your animations. They never had to install anything, sign in to anything, or download anything. You watch the view count tick up in your dashboard. You publish that URL with two CLI commands:
That’s the promise of HTML for presentations.

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