Observed arrival · 2026-09-30

Marginalia Notes: a PDF reader that remembers

marginalianotes.app Visit website

Editorial interest 81/100 Selection signal · not a rating of the site

A PDF reader that collects passages on a notes canvas, connects related ideas, and links each note back to its source page.

Landing page captured for the 2026-09-30 issue.

For: Readers building connected notes from PDFs
Worth noticing: A canvas export preserves each excerpt’s page, personal note, and labeled links in one Markdown file.

Field notes

The page says PDFs and notes stay in browser IndexedDB, with no account or upload; it also identifies the code as MIT-licensed and links to GitHub. A canvas export becomes a Markdown file containing excerpts, source-page references, notes, and labeled relationships, intended to travel alongside the PDF into ChatGPT or Claude. The page offers a sample PDF and an app launch; it does not describe browser compatibility or storage limits.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

One card from the complete issue

Ask the Descendants

390,826 arrived 1,000 judged 983 catalogued Enter the complete issue