Tab Activity draws your browsing day as an instrument — a 24-hour dial where every ring is a site and every arc is a stretch of real, focused attention. Not tabs left open. Attention.
FREE · NO ACCOUNT · NOTHING LEAVES YOUR MACHINE
The idea
Most time trackers count how long a tab existed — so twenty pinned tabs all report eight hours, and the numbers mean nothing. Tab Activity measures something stricter: a site only earns time while its tab is focused, its window is focused, and you are actually active at the keyboard or mouse.
Walk away and the clock pauses. Watch a film fullscreen and it doesn't — the one exception is media you're plausibly watching. What's left is an honest record of your attention, drawn beautifully enough that you'll actually look at it.
What's inside
Your day on a 24-hour face: midnight at the top, each site on its own ring, each focused session a luminous arc. Hover any arc for the page title and exact times. A brass hand marks now, and the centre keeps your running total.
The same day laid flat — every session a frame, in order. The gaps are usually the most interesting part.
A 7×24 heatmap shows when in the week your attention burns brightest, with peak-hour and busiest-day stats. Month and year views stack each day into colored bars until your history reads like a texture.
Tag domains as Work, Learning, Entertainment — whatever fits your life — and flip any view to read by intent instead of by site.
Set a daily allowance per site, or one budget for everything. Cross it and you get a single quiet notification — once, not a nag. Tab Activity warns; it never blocks. The choice stays yours, and the overshoot stays on the record.
Exclude sites from tracking entirely, hide them from view, purge a single domain's history, export everything as JSON or CSV, or wipe it all. A badge on the toolbar icon can show today's total, if you want a glanceable conscience.
Four instruments
Privacy
An extension that watches your browsing should make you suspicious. Here is why this one doesn't need your trust, only your inspection:
Tab Activity makes no network requests. Ever.
Everything is stored in your browser's local database (IndexedDB) on your device. There is no server, no account, no sync, no analytics, no telemetry, and no third-party code.
Only the site domain is kept long-term — youtube.com, never the 300-character URL of what you watched. Page titles are held for at most 7 days for the day view, then discarded in the nightly rollup.
Incognito windows are never tracked. Excluded domains are never recorded. Deleting your data deletes it — there is no copy anywhere else, which also means: export before you switch machines, or it stays behind.
The source is readable — no build step, no minification. Open the extension folder and read exactly what runs.
The full policy lives at privacy.html — the same document linked from the Chrome Web Store listing.
Install