Kepler

Browser extension

Mark up the web for your AI.

The Kepler extension lives where you browse. Save any page with what’s inside it, comment on the exact spot, and keep it all in spaces you share and your AI can use.

Bookmarks, retired.

  1. Save with full context

    One click saves the page to a space with what’s inside it. Kepler summarises it and keeps your note beside it, not just a bare URL.

    Pictured: Saving spacex.com/humanspaceflight from the browser: Save in Kepler’s dock on the page saves it to Space trip, and Kepler keeps its summary. SpaceX’s page for crewed flights: Earth orbit, a space station, the Moon and Mars, on Dragon and Starship.

  2. Comment on the exact spot

    Switch to comment mode and pin a thought to a paragraph, an image or a price. It stays anchored there, for you and everyone in the space.

    Pictured: A comment pinned to a paragraph of Human Spaceflight: “Sixteen sunrises a day.”

  3. Talk it through

    Reply in the thread, mention the people in your space, or mention Kepler to answer from what you’ve all saved.

    Pictured: A thread: Mia: “Do we need astronaut training?” Roger: “@Kepler what did we save about training?” Kepler answers: “The Reddit thread you saved says about two weeks of training, and Mia’s note says the centrifuge day is the hard one.”

  4. Summarise in a click

    Summarise a video or a long page without leaving it. Kepler reads the transcript or the text and keeps the key points with your save.

    Pictured: Before your first spaceflight, a video on YouTube: pointing at it brings up Kepler’s Clip and Summarize pill. Summarize sends its transcript to be summarised, and Kepler’s side panel keeps the summary with the save in Space trip: “Train for the launch, not the float. Pack light: every gram costs fuel.”

  5. Ask your space

    Ask Kepler in the side panel. Answers come from the saves, notes and comments in your space.

    Pictured: Asked in Space trip: “Which trip fits our plans?” Kepler searches the space, finds two saves and answers from them.

  6. Spaces you share

    Keep a space for each project, from a trip to your recipes or your research. It’s yours until you invite people to save and comment with you.

    Pictured: In Kepler’s side panel, mia@example.com is invited to Space trip as a contributor; the invitation is sent and they’re listed as pending.

Where the deep work happens.

The extension is where you do the work: re-reading sources, layering annotations, building threads, and pulling it all into context for AI.

  1. Research.

    Triage and synthesise

    Save while you browse, comment across sources, then ask AI to reason over the whole set.

  2. Learning.

    Keep what each lesson taught

    Save tutorials, docs and threads as you learn, with a note on what to try, then ask what they said.

  3. Teams.

    Shared context that lasts

    Comment threads and shared spaces keep your team’s knowledge in one place instead of scattered across tabs.

Add it to your browser

Available across every major browser, with Safari on the way.

Save on the move.

Save pages, videos and posts from your phone with the Kepler app, on iPhone, iPad and Android.