Why HTML Presentation Tools Like Gamma and Genspark Break When Converting to Google Slides

HTML-based presentation tools like Gamma and Genspark have gained popularity for their sleek interfaces and AI-powered features. But there's a critical problem that only surfaces when you need to export: HTML elements fundamentally break when converted to native Google Slides or PowerPoint objects.

The HTML Conversion Problem

When you create a presentation in Gamma or Genspark, you're working with HTML, CSS, and web-based rendering. Everything looks great in your browser. But your presentation isn't actually made of slides - it's made of div tags, CSS styles, and JavaScript interactions.

The moment you try to export to Google Slides or PowerPoint, you hit a wall.

What Actually Breaks

• Custom fonts revert to system defaults
• CSS-based layouts collapse into misaligned objects
• Nested bullet points lose their hierarchy
• Text formatting (colors, sizes, spacing) gets stripped
• Images and icons shift positions or disappear
• Interactive elements become static or vanish entirely
• Background gradients flatten to solid colors

Why This Happens: HTML vs. Native Objects

Google Slides and PowerPoint don't understand HTML. They work with a completely different object model:

• Text Boxes: Fixed containers with specific font, size, and positioning properties
• Shapes: Vector objects with defined dimensions and colors
• Bulleted Lists: Structured text with specific indentation levels
• Images: Raster or vector files with locked aspect ratios and positions

HTML, on the other hand, is fluid and flexible. A div can contain anything. CSS can make text behave like buttons. Flexbox can arrange elements dynamically. None of this translates cleanly to the rigid structure of PowerPoint or Google Slides objects.

The Native Solution: Building in Google Slides from the Start

This is where Decky takes a fundamentally different approach. Instead of building in HTML and hoping the conversion works, Decky creates presentations directly in native Google Slides format using the Google Slides API.

Why Native Matters

• Real text boxes: Fully editable, movable, and formattable
• Native objects: Shapes, images, and bullets work exactly as expected
• Template compatibility: Works with your existing Google Slides templates
• Team collaboration: Anyone with Google Slides can edit immediately
• Zero conversion issues: Because there's no conversion needed

The Bottom Line

HTML-based presentation platforms like Gamma and Genspark are impressive technology. But they're optimized for staying within their own ecosystems, not for integrating with the presentation tools most organizations actually use.

If your team lives in Google Slides or PowerPoint - and most do - you need a solution that creates native presentations from the start. That's the only way to avoid the formatting headaches, conversion problems, and wasted time that come with HTML-to-Slides exports.