Slides scatter your notes.
This puts them back together.
Lecture slides split every idea across a dozen disconnected boxes with no hierarchy. Coherence reads your uploaded slides, PDFs, and notes, and rebuilds them into one unified, consistently structured study guide — decision trees and formula flow for quantitative courses, comparison cards and labeled concepts for theory courses.
1. Add your material
PowerPoint (.pptx), PDF, Word (.docx), images, or plain text/markdown. Add as many as you need for one unit or lecture.
Or paste text instead
2. Settings
How it works
Extraction happens in your browser
Your .pptx, .pdf, and .docx files are parsed locally with JavaScript the moment you drop them in — nothing is uploaded anywhere at this step.
Your key talks directly to Anthropic
The extracted text (plus the reformatting rulebook) is sent straight from your browser to Anthropic's Claude API using your own key. No server of ours ever sees your files or your key.
You get one HTML study guide
The result is a single self-contained HTML file — tabs, decision trees, or comparison cards depending on your course type — ready to open, download, or study from immediately.
This is a static site with no backend. It cannot see your API key or your files — they never pass through any server we control. Standard Anthropic API usage charges from your own account apply per reformat.