How to Process NotebookLM PPTX Slide Watermarks Locally

NotebookLM can export a slide deck as a PowerPoint file as well as a PDF. The .pptx is the better container if the deck still has a life after the meeting — it keeps its speaker notes, its animations and its editable text. This guide covers the browser-local workflow for that file.

Clean the .pptx in your browser

Open the PPTX Slide Deck tool, choose an exported .pptx up to 100 MB, and start processing. The file is unpacked and repaired in your browser; it is not uploaded to our server. When the result is ready, downloading it uses 10 credits — the same price as a PDF deck, because to you it is the same job.

What the tool supports

• NotebookLM Slide Deck exports saved as .pptx
• Decks up to 100 MB, one full-page image per slide
• Both export shapes: a badge baked into the slide image is repaired pixel by pixel, and a badge attached as a separate shape is removed outright
• A new .pptx download that still opens in PowerPoint, Keynote and Google Slides

Processing time depends on the number of slides and your device. Keep the tab open until the result is ready.

What changes and what stays

Only the bottom-right corner of the slide images is rewritten. Nothing else in the package is touched: speaker notes, transitions, animations, themes, embedded media and every XML part come back byte-for-byte identical. That is why the output is still an editable deck and not a stack of pictures.

If the deck has no watermark, the tool stops and tells you instead of altering a file it did not recognise — and nothing is charged.

Privacy and responsible use

Use the tool only for files you own or have permission to modify. This independent tool is not affiliated with or endorsed by Google LLC. It handles visible slide content only; it does not make a claim about invisible identifiers or metadata.

For pricing and credit details, see Pricing. Working with the PDF export instead? Read the PDF slide guide. Video overviews are covered by the MP4 video guide.