QUESTIONS · SOURCES AND LIMITS
How do I work around the NotebookLM source limit?
Short answer
You cannot raise the limit, but you can fit more into it. Merge related sources into one text source, combine small text files before importing, and split work across notebooks by topic. NotebookLM Ultra Exporter has a merge tool in the Sources panel that keeps a table of contents, the original titles and links.
Steps
- Install NotebookLM Ultra Exporter in desktop Chrome, then refresh any open NotebookLM (Gemini Notebook) tab.
- In the Sources panel, tick at least 2 sources.
- Choose Merge into one source and name it.
- Check the result, then delete the originals to free slots.
What to know
- A merged source must still fit the per-source size limit.
- Citations then point to the merged source, not to the individual documents.
- The originals are not deleted automatically; remove them once you have checked the merged source.
Google changes these menus often. The item's own menu in your notebook shows what is built in today.
Free or Pro?
Free, with no daily export quota and no website account needed. Pro covers the extension only; it does not include a Google subscription or raise NotebookLM's own limits. Current prices are on the pricing page.
Frequently asked questions
Is upgrading my Google plan the alternative?
Yes. Paid Google plans allow more sources per notebook. Merging is the no-cost option.
Related guides
When a notebook reaches its source limit, NotebookLM Ultra Exporter can combine several sources into one text source that keeps a table of contents, the.
Google documents a limit of 50 sources per notebook on the free tier, with each source limited to 500,000 words or 200 MB.
To add Markdown notes or documentation, select the .md files in the NotebookLM Ultra Exporter import center.
NotebookLM accepts website links through its add-source dialog, a few at a time. To import a long list, paste the URLs, one per line or mixed into text, into.
NotebookLM takes YouTube videos one link at a time and does not expand a playlist. Paste the playlist URL into the YouTube import of NotebookLM Ultra.
NotebookLM fetches links from Google servers, not from your browser. A page fails when it needs a login, sits behind a paywall, blocks automated requests, or.
NotebookLM cannot open a ChatGPT conversation from its link. Either copy the conversation and paste it as a text source, or open the chat with NotebookLM.
NotebookLM accepts PDF, text and Markdown files, Word documents, Google Docs and Slides, web page links, YouTube links, audio files, images and pasted text.