Troubleshooting

Fix Corrupted AI PowerPoint Files

Updated September 2026

If you're seeing “PowerPoint found a problem with some content” repair dialogs from other AI presentation tools, you're not alone. It is one of the most common complaints about AI presentation tools — and it has a simple cause and solution.

Why AI Presentations Get Corrupted

Most AI presentation tools (Gamma, former Tome, SlidesAI) build slides as HTML web pages, then convert that HTML into .pptx format. This conversion produces invalid Office Open XML — which PowerPoint flags as corrupted content requiring repair.

Common Symptoms

"We found a problem with some content in [filename].pptx" repair dialog
Fonts replaced with system defaults (Calibri, Arial) after opening
Chart/diagram elements converted to flat, non-editable images
Slide layouts shifted — elements overlapping or misaligned
Missing images or broken image placeholders
File size unusually large (embedded base64 data instead of proper assets)

The Solution: Native PPTX Generation

Dekked doesn't convert from HTML. Instead, it builds PowerPoint objects directly using the Office Open XML specification — the same format Microsoft PowerPoint uses natively. Every text box, chart, shape, and image is a proper PowerPoint element.

Zero repair dialogs — guaranteed

Editable charts with real data

Proper font embedding

Correct slide master references

Native image embedding (not base64)

Valid Office Open XML structure

How to Switch from a Broken Tool

1Copy the text content from your corrupted presentation (or use the original source document)
2Upload the source document (PDF, DOCX, or text) to Dekked
3Review the AI-generated outline and adjust slide structure as needed
4Generate and download a clean, native .pptx file that opens without issues

Related guides

Never see a repair dialog again

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