NBLM2PPTX
FreeConvert NotebookLM PDFs to PPTX with separated background images and editable text layers using Gemini AI
FreeFree tier
About NBLM2PPTX
NBLM2PPTX is an open-source tool that converts NotebookLM exported PDFs into PPTX presentations with separated background images and editable text layers. It leverages Google Gemini AI for OCR and text extraction, offering a dual mode OCR system (Lite for speed and API quota savings, Standard for full font style preservation) and parallel processing to reduce conversion time to 2-3 seconds per page. The tool features a modern light theme with internationalization support (English, Spanish, Japanese, French, Simplified Chinese), browser-based API key storage, and collapsible UI elements. It is available on GitHub under the MIT license.
Key Features
Dual Mode OCR System: Lite (gemini-2.5-flash-lite) for speed and API savings, Standard (gemini-2.5-flash) for full font style detection
Parallel Processing Technology: Simultaneous text removal and OCR, reduces processing time to 2-3 seconds per page with intelligent fault tolerance
Hybrid Text Extraction: Uses PDF.js native text extraction for precise positioning without additional API calls
AI Text Removal: Cleans background images by removing embedded text from NotebookLM PDFs
Complete Internationalization (i18n): Professional light theme design for English, Spanish, Japanese, French, and Chinese with language-specific fonts
Browser-based API Key Storage: Uses localStorage for API key setup, eliminating the need for code editing
Clear Usage Guidelines: Specifies best use cases for Lite vs Standard OCR modes
Free and Open Source: Licensed under MIT with active development
Pros & Cons
Pros
- Free and open-source under MIT license, no cost for the tool itself
- Dual OCR modes allow users to balance speed and quality based on their needs
- Parallel processing significantly reduces conversion time compared to sequential methods
- Output preserves editable text layers and separates background images for easy editing
- Multi-language support with professional, modern UI design
- No code editing required for API key setup thanks to browser-based storage
- Active development with regular updates and improvements
- Handles text removal from embedded images in NotebookLM PDFs
Cons
- Requires a Google Gemini API key; API usage incurs costs beyond the tool itself
- Lite OCR model applies uniform text styling, losing font size hierarchy and color variations
- Designed specifically for NotebookLM exported PDFs; may not work with arbitrary PDFs
- Requires technical setup: must be run as a script or local web application
- Still in development; some features may be experimental or version-dependent
Best For
Converting NotebookLM PDF exports into editable PowerPoint presentationsRepurposing plain text notes, meeting minutes, or content drafts (Lite OCR model)Creating beautiful presentations, brand showcases, or teaching slides with preserved visual hierarchy (Standard OCR model)Extracting text from NotebookLM PDFs for further editing while keeping background images intact
FAQ
What is NBLM2PPTX?
It is an open-source tool that converts NotebookLM exported PDFs into PPTX presentations, separating background images and creating editable text layers using Gemini AI for OCR and text extraction.
How does the dual mode OCR work?
The Lite model uses gemini-2.5-flash-lite for faster processing and 50% API quota savings, but applies uniform styling. The Standard model uses gemini-2.5-flash to preserve font sizes, weights, and colors for full visual hierarchy.
Is NBLM2PPTX free?
Yes, the tool itself is free and open source under the MIT license. However, it relies on Google Gemini API, which may incur usage costs.
Do I need to set up an API key?
Yes, you need a Google Gemini API key. The tool provides a browser-based interface using localStorage to store the key, so you don't need to edit code.
What languages are supported?
The interface supports English, Spanish, Japanese, French, and Simplified Chinese, with language-specific font fallbacks.
Can I use it with any PDF?
The tool is specifically designed for NotebookLM exported PDFs. It may not work properly with other PDF formats.