Notes summarizer
Summarise a lecture, reading or chapter into the few ideas that matter, at the length you choose. The key terms from your notes are kept, not paraphrased away.
0 / 12,000 characters
Length
Your summary appears here
Read it once, then try to rewrite it from memory. The parts you cannot reproduce are the parts to study.
How to write a summary of your notes yourself
The AI can compress text, but writing a summary yourself is a study technique in its own right, because you have to decide what matters. A reliable routine:
- Find the question the lecture answered. "How do plants turn light into sugar?" is a better anchor than "Lecture 6".
- List the three to five ideas that answer it, in one line each.
- Keep the exact terms your course uses. A summary that swaps "Calvin cycle" for "the sugar-making part" will not help in the exam.
- Close the notes and write it. Then compare. This is the blurting method by another name.
Cornell notes build this in: the summary box at the bottom of each page. See the Cornell notes guide and template.
Questions students ask
How does the notes summarizer work?
Choose a length and press "Summarise with AI". The AI rewrites your notes into a short summary that keeps the key terms, starting with the most important idea. The "Key sentences" button instead picks the most information-dense sentences from your own text, offline, without rewriting anything.
Can it summarise lecture transcripts or textbook chapters?
Yes, any text up to 12,000 characters (about 2,000 words). For a longer chapter, summarise it section by section; the separate summaries make a good one-page revision sheet.
Should I study from a summary?
Use a summary to get the big picture before a lecture or at the start of revision. For the exam itself, turn the summary into questions: summaries alone are rated only moderately effective in Dunlosky et al. (2013) because they depend on what you do with them.
Is my text stored?
No. The offline mode never leaves your browser. The AI mode sends the text once to generate the summary; NoteSynthesis does not keep it. Your last input is saved only in your own browser.