Footnote
A layer of private notes and community discussion that lives on top of every webpage — not just ones with built-in comments.
Free to use. Your notes are end-to-end encrypted.
What you get
Private Notes
Write notes on any webpage. Encrypted end-to-end with AES-256 before leaving your device — not even we can read them.
Community Discussion
See what others are saying about the page you're on. Post comments, reply to threads, and follow conversations in real time.
Works Everywhere
Overlays on any URL — news articles, docs, research papers, product pages. No integration needed from the site owner.
Cross-Device Sync
Your encryption key syncs across your own Chrome installs. Notes follow you — nobody else can read them.
Privacy-first, by design
Notes are encrypted with AES-256-GCM before they leave your device. The encryption key lives in your browser's secure storage — synced across your own Chrome installs, never sent to any server. Even if our database were compromised, your notes are unreadable ciphertext.
Read our Privacy PolicyReady to annotate the web?
Install the free Chrome extension in seconds. No account required to take notes.
Install Footnote