Every claim, one click from its source.

Underanchor is a LaTeX editor where every sentence is anchored to the exact paragraph of the source PDF it comes from. Bring your own AI (Claude, ChatGPT) via MCP; your supervisor reviews the text and the source side by side.

How it works

Upload your PDFs: every paragraph becomes a citable unit with its exact position on the page.
Write in standard LaTeX and anchor each sentence to the paragraph that supports it; sentences without a source are flagged.
Click a citation to open the PDF at the right page with the paragraph highlighted.
Share with your supervisor, who reviews the text and the cited paragraph side by side, for free.

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