Keep your notes on the page
Write beside what you’re reading. Your notes return when you revisit the page.
Your thoughts,
right on your tabs
A note that feels like yours
Choose your colors and text size. Make space for your ideas, your way.
Give your agent a place to write
Connect Codex or Claude to read, create, and update notes on the same page. Agent connections are optional.
More ways to use Duonote
Keep the text you select
Select text on a webpage, then right-click to save it in a note with supported formatting.
Paste pictures, too
Bring text and images into your notes. Your saved pictures stay with the note.
Create with a shortcut
Start a note from the keyboard, then click where you want to place it.
More than plain text
Use headings, bold, italic, lists, checklists, links and dividers.
Size the words that matter
Change the size of selected text, without resizing the rest of your note.
Find your color
Choose a preset or make your own. Text adapts to keep your note readable.
Put it where it helps
Drag your note by its dotted handle and resize it to fit your space.
Copy it. Make another
Copy a note’s content or duplicate the whole note to keep working from it.
Clear some space
Hide notes until you need them. Bring overlapping notes forward or send them back.
Take it as Markdown
Download a note as a .md file, with any pictures saved alongside it.
Local. Ready offline
Write without an account or internet connection. Notes are saved in your Chrome profile.
Write in either direction
Mix Arabic and English, with text direction set for each paragraph.
Frequently asked questions
What is Duonote?
Duonote is a Google Chrome extension for notes on webpages. Keep a checklist beside a task, leave feedback on a design, or save research alongside its source. Notes are stored in your Chrome profile. You can write them yourself or connect an AI agent to read, create and update them.
Will my notes be there when I come back?
Yes. Notes are saved in your Chrome profile and return when you revisit the page’s saved URL, even after restarting Chrome. Open notes also stay with their tab as you browse.
What can I customize?
Choose a preset or custom color, change text size, and drag or resize each note. Add headings, bold and italic text, links, bullet and numbered lists, and checklists. You can also duplicate notes or download them as Markdown.
Do I need an AI agent to use Duonote?
No. You can create and edit notes yourself, without an agent or an account. Manual notes work offline, too.
How do Codex and Claude use my notes?
Connect an agent in Settings → Agents and approve access in Chrome. Codex and Claude Code can use the local MCP connection to read, create and update notes. Claude web and desktop use a separate hosted connection where configured. See the Codex and Claude setup guide.
Where are my notes stored?
Your notes are stored locally in your Chrome profile, with no cloud sync. When you connect an agent, the note content and page URLs it requests can be shared with that AI provider. Notes displayed on a webpage are part of that page, so avoid putting secrets in them.
Which browsers and pages are supported?
Duonote is built for desktop Google Chrome, version 120 or later. It works on ordinary webpages where the extension has permission to run. Chrome blocks extensions on its internal pages and the Chrome Web Store. See supported pages.
Can I try it before buying?
Yes. You can keep one saved note for free per Chrome profile. A license removes the note limit. Hidden notes still count toward the free limit.
Is this a subscription?
No. A Duonote license costs $9.99 USD once, with all future updates included. After purchase, enter your key in Settings → License to activate it. Initial activation needs an internet connection.