Features

Everything it does. On one page.

Four tab tools in one, a library and notes beside it. Most of it is free with no limits; Pro adds sync and the power tools.

62 features in 10 areas 42 of them free, with no caps Compare plans

Free in every copy, for good Pro part of Larksail Pro Preview early, may change

Collections & spaces

Save tabs into collections, group collections into spaces, and keep all of it on one board.

10 features
  • Collections

    Free

    Save a tab, a window or a selection. Rename, reorder, drag and drop, sort, open all or just the ones you pick.

  • Spaces

    Free

    Keep work, side projects and that trip apart — a sidebar on the board, a switcher in the side panel.

  • Unlimited, always

    Free

    No caps on collections, saved tabs, spaces or notes. Pro adds power, never room.

  • Board layouts

    Free + Pro

    Cards, List, Launcher and Wide. Pro adds a Table, a free-form dashboard and a mind map.

  • Sticky notes & images

    Free

    Notes and checklists right on the board, image cards, PDFs dropped on a collection.

  • Quick Look

    Free

    Press Space on a saved tab to preview it without opening a tab.

  • Save from anywhere

    Free

    Right-click a page, a window or a link → Save to collection. One click in the toolbar for the current page.

  • Collection history

    Free

    See what a collection looked like before — 90 days of versions, restorable.

  • Collections from bookmarks

    Free

    Turn browser bookmark folders into collections in one go, with one Undo.

  • Covers & the icon library

    Pro

    Collection covers, 3D, tile and duotone icons, note styles and Home backgrounds.

Tab automation

The browser tidies itself — and anything it closes lands in the archive, with Undo.

10 features
  • Auto-suspend

    Free

    Idle tabs free their memory and stay in the tab strip; they reload on click. Exceptions per site.

  • Auto-archive

    Free

    Tabs you stopped using move to the archive on their own. Time away from your computer doesn’t count.

  • Close duplicates

    Free

    One click, or automatically. Smart about tracking parameters and fragments.

  • Already open

    Free

    Open a page you already have and the existing tab comes to you instead.

  • Merge windows

    Free

    All windows, or the ones you pick, into the one you’re in.

  • Declutter

    Free

    Every open tab on one screen: filter by site, age or duplicates, then close, save or group them together.

  • Bulk close

    Free

    Close tabs by address or title pattern with a live preview of what goes.

  • Pin all tabs

    Free

    Pin every tab in a window — or unpin them all — in one undoable step.

  • Closed groups

    Free

    Every tab group is mirrored, so a group closed by hand or by a restart comes back whole.

  • Auto refresh

    Pro

    Reload a tab every 30 seconds up to every hour.

Library & reader

Everything you’ve saved, as a library you can actually find things in again.

9 features
  • The Library

    Free

    Every saved page in one place, with Forgotten to resurface what you saved and never opened.

  • Reader

    Free

    Read saved copies in a clean Text view or the original Page view.

  • Saved copies

    Pro

    Keep a readable copy of each page you save, so it outlives the site. Copies already taken stay readable for everyone.

  • Highlights

    Free + Pro

    Highlight passages in saved copies — and with Pro, add notes to them.

  • Search inside saved pages

    Pro

    Full-text search through the words of every saved copy, not just titles.

  • Full-page snapshots

    Pro

    An exact MHTML or PDF snapshot of a page, shown sandboxed. Chromium browsers.

  • Duplicates

    Free

    Find the same page saved in several collections.

  • Broken links

    Pro

    Check which saved pages are gone or moved, and update their addresses.

  • Reminders

    Pro

    Remind me ▸ on a saved tab or a note, and it comes back when you said.

Notes

Write down what you learned, next to where you learned it.

8 features
  • Block editor

    Free

    Headings, lists, callouts, toggles, tables and [[links]] between notes.

  • Notes beside the page

    Free

    Open notes in the side panel and write while you browse.

  • Notes on collections & tabs

    Free

    A “why did I save this?” line and tags on any collection or saved tab.

  • Boards in notes

    Free + Pro

    Kanban boards with plain cards inside a note. Pro adds due dates, labels, checklists and full-page boards.

  • Live blocks & templates

    Pro

    Live collection and query blocks, templates and the daily note.

  • Find & replace everywhere

    Pro

    Search and replace across all your notes at once.

  • Drawings

    Pro

    Sketch right in a note with /drawing — works offline.

  • Markdown export

    Free

    Every note, as plain Markdown files, whenever you want them.

Focus

Block the sites that pull you away, for as long as you need.

4 features
  • Focus timer

    Free

    Block distracting sites for a set time, with a calm block page instead of an error.

  • Friction unlocks

    Free

    Need in anyway? Unlock for a few minutes after a short wait or a typed phrase — enough to break the reflex.

  • Schedules & budgets

    Pro

    Recurring focus hours and daily per-site time budgets.

  • Pomodoro & strict mode

    Pro

    Work and break cycles, and blocks that can’t be turned off until they end.

Data & backups

Safety nets and no lock-in — free forever, by design.

6 features
  • The archive

    Free

    Every closed tab lands here, grouped by day, searchable and restorable.

  • Undo for everything

    Free

    Every automatic close, move or merge can be undone.

  • Snapshots

    Free

    Automatic snapshots of all your windows, restored exactly — a quiet safety net.

  • Automatic backups

    Free

    A full copy in your Downloads folder on a schedule, with a visible health status.

  • Imports

    Free

    Toby, OneTab, Session Buddy, Workona, Pocket, bookmarks and more — with folders, notes and dates.

  • Exports

    Free

    Everything as JSON and HTML bookmarks; any collection as Markdown too.

Sync & publishing

Your library on every computer, encrypted so only your devices can read it.

3 features
  • End-to-end encrypted sync

    Preview Pro

    Collections, notes, images, highlights and reminders between your computers.

  • Trusted devices

    Preview Pro

    New browsers are approved from one you already have, with a matching code. A recovery key for the worst case.

  • Publish a collection

    Preview Free

    Share a collection as a page at larksail.com/c/… — unpublish any time.

AI

Off until you turn it on — with a provider you choose, or on your own computer.

4 features
  • Ask in search

    Free

    Ask your library a question and get an answer with its sources. Your own key, or a model on your computer.

  • The assistant

    Pro

    Chat with your library, and let it act on tabs and collections — with Undo.

  • Summaries & suggestions

    Pro

    Summaries of saved pages, suggested tags on save and help with writing.

  • Suggest groups

    Pro

    In Declutter, let AI propose how to group the tabs you have open.

Integrations

Send what you save to the tools you already use.

3 features
  • Webhooks

    Pro

    Post saves to Zapier, Make, n8n or Pipedream — or right-click Send to ▸. A Slack preset included.

  • MCP for AI apps

    Pro

    Let Claude, ChatGPT or Cursor on this computer search your library and act on tabs, once you allow it.

  • Slack app

    Coming Pro

    Connect Slack and send collections, tabs and notes to a channel as you.

The free line doesn’t move

Nothing free will get a cap, and nothing that keeps a tab safe or your data portable will ever be Pro. Until Pro launches, every feature here is open to try. See pricing.