Fasting timer for Chrome

See how long is left in your fast from your browser toolbar. Start from your last meal, plan across midnight and finish when you choose.

Download extension ZIP

Version 1.0.0 · Desktop Chrome 120+ · Free

Manual installation instructions
FastingCalc toolbar timer showing time remaining, progress and the estimated eating window.

Install from the ZIP

  1. Download the ZIP and extract it into a folder you can keep on your computer.
  2. Open chrome://extensions in desktop Chrome and turn on Developer mode.
  3. Choose Load unpacked and select the extracted folder containing manifest.json.
  4. Open Chrome’s Extensions menu, pin FastingCalc and click its icon to choose a schedule.

Your timer and privacy

Choose a preset or a custom fast of 1–24 hours. The timer works offline, restores when you reopen Chrome and keeps the last seven finished sessions in this browser profile.

The extension sends no fasting records to the website. You can clear history, reset all local data or turn off completion reminders in the popup. Reminders depend on Chrome running and your device’s notification settings.

For informational use only. Disclaimer · Contact support