Load your file
Even the moment you pick a file, the data never leaves your browser.
Process the slide watermark in a NotebookLM PowerPoint export in your browser and save it back as a PPTX file.
Supports NotebookLM PPTX exports (recommended under 300MB)
Everything runs in your browser's memory. Very large files can crash the tab, especially on phones — keep inputs small.The .pptx is unzipped, only the embedded slide images (ppt/media) are inpainted at the watermark region, and the file is re-zipped.
Formats PPTX → PPTX


No account, no upload queue. Done in three steps.
Even the moment you pick a file, the data never leaves your browser.
A dedicated engine for videos, documents, and images handles the watermark area.
Get the result you previewed as a local file, not a server link.
Tuned to the exact watermark position and size that each NotebookLM and Gemini format uses.
File data is only read and written in the browser memory you're using right now.
Creates the output right on your device instead of an expiring external link.
No. Every processing engine and all file data run inside your browser.
Yes. Text, shapes, and layout are untouched — only the images inside the file are cleaned.
Only the raster images under ppt/media that carry the watermark; the rest of the .pptx is preserved.
No. It only rewrites the affected images and repackages the archive.