TabTimer

Shows how long each tab has been open. Badge shows count of old tabs.

TabTimer — Shows how long each tab has been open. Badge shows count of old tabs.

TabTimer is a free Chrome extension by lern-digital.de. Everything runs in your browser — no signup, no API key, no tracking. Install once, use offline.

Download ZIP (v1.0.0) How it works

Free · Chrome 114+ · Manifest V3 · Works in Edge & Brave · No signup

3 minutes to get started

1

Install

Download ZIP, unzip, open chrome://extensions, enable Developer Mode, click "Load unpacked", select the folder.
2

Open

Click the TabTimer icon in your toolbar to open the popup.
3

Use

Use the feature. Results stay on your device unless you explicitly copy or download them.

What TabTimer does

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Remembers settings

Your preferences persist between sessions, locally only.

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Fast

Instant results — no servers, no round-trips.

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Private by default

All processing happens on your device. No tracking, no accounts.

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Free

No subscription, no API key, no sign-up.

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Works in Chrome & Edge & Brave

Manifest V3 compatible — runs wherever Chromium runs.

Permissions & why

tabs

Read the active tab's URL/title so the extension can show context and enable the right UI state.

storage

Save your preferences and results in Chrome's local storage on your device.

alarms

Schedule periodic local tasks (e.g. a timer, a reminder).

Your data stays yours

TabTimer runs entirely locally in your browser. No data ever leaves your device. No analytics, no tracking, no telemetry. All settings and results stay in Chrome's local storage on your machine.

Full Privacy Policy →