ThirdNote
ThirdNote
Free Chrome extension

Capture everything.
Remember anything.

Turn information into knowledge. Highlight what matters in your AI chats, videos and across the web, lay it out on a board, and review it as flashcards.

No account. No servers. Your notes stay in your browser.
ThirdNote reader showing a saved chat with highlights
Works everywhere

Works where you learn

Save whole AI conversations, clip any page, capture any part of the screen.

AI chatsVideosArticlesResearch papersSocial postsPDF slidesAny website
Features

Everything you need to remember

Highlight in four colours

Select text and press 1 to 4. Key point, Important, Example, Idea, or names you choose.

Save chats that keep growing

Press Save chat once. New messages are added automatically while you keep chatting.

Capture any part of the screen

Grab a video frame, a chart or a post. On videos the timestamp comes with it. Screenshots never get lost in your gallery again.

One collection at a time

Switch on Collecting and every save, from any site, lands in the collection you are working on.

Review as flashcards

Your own questions become the prompts. Recall first, reveal, and mark what to see again.

A board for your ideas

Lay out screenshots, notes and highlights on a canvas with sticky notes, images and arrows. Export to Markdown or PDF.

Highlight the answers that matter

A small toolbar appears under your selection. Pick a colour, add a note if you like, done. Highlights come back every time you open the page.

Highlighting text in an AI chat

Your ideas, on one board

Every collection has a canvas. Screenshots, clips, notes and saved chats appear as cards. Move them, resize them, connect them with arrows, and drop in sticky notes, headings and images. Great for thumbnail ideas, research and study maps.

ThirdNote board with screenshots, notes and sticky notes

Everything worth remembering, in one place

The side panel keeps your collections, groups and highlights next to whatever you are reading. Search across all of it.

ThirdNote side panel with highlights

Remember anything

Review mode shows one card at a time. Your question on the front, your highlight on the back. Keyboard friendly: Space, 1, 2.

Flashcard review

Private by design

ThirdNote has no servers and no accounts. Everything you save lives in your own browser, and you can download a full backup whenever you want.

Read the privacy policy
  • Stored only on your device
  • No tracking, no analytics, no ads
  • Reads a chat only when you save it

Turn information into knowledge

ThirdNote is on its way to the Chrome Web Store. This button will take you there as soon as it is live.

Add to Chrome, it's free