NotebookLM is showing a 'file too big' or 'exceeds limit' error on your PDF. The 200MB limit is the cause — compress your file below it instantly using the tool above.
👉 Fix: Compress your file below 200 MB using the tool above.
NotebookLM surfaces three distinct error messages for oversized PDFs: 'file too big', 'exceeds limit', and 'upload failed'. All three point to the same root cause — the 200MB per-file cap. Scanned PDFs store each page as a high-resolution image, which inflates file size far beyond what a text-only PDF of the same page count would produce. Compressing reduces embedded image quality without touching the text layer NotebookLM reads for analysis.
It means your PDF exceeds the 200MB per-file limit. NotebookLM will also show this as 'exceeds limit' or 'upload failed' depending on where in the upload flow the rejection occurs. Compress the PDF below 200MB to fix it.Source: Google Help ↗
Your PDF is over 200MB. Scanned PDFs and research papers with embedded high-resolution images are the most common cause. Each scanned page is stored as an image, which inflates file size significantly compared to a text-only PDF.Source: Google Help ↗
Compress your PDF using the tool above. This reduces embedded image quality and removes redundant data, bringing the file below the 200MB limit without affecting the text NotebookLM reads.Source: Google Help ↗
Yes — all three messages indicate the same root cause: your PDF exceeds the 200MB per-file limit. The message shown depends on where in the upload process the rejection occurs.Source: Google Help ↗
Split the PDF into smaller parts and upload them as separate sources in NotebookLM. Each part must be under 200MB.Source: Google Help ↗