Back up and move your fasting log
Keep a copy of your sessions and water log, move them to a new device, or open them in a spreadsheet.
Talk with a healthcare professional before changing how you eat if you have a medical condition, take medication, are pregnant or breastfeeding, are under 18, or have a history of disordered eating. Stop and seek help if you feel unwell.
Why a backup matters
Fasting Toolkit has no accounts. Your sessions, water entries and weekly plan are stored in your browser’s local storage on one device. That keeps them private, but it means they disappear if you clear your browsing data, reset your phone or switch browsers, and they do not appear on your other devices.
Download a backup
- Open the fasting log.
- Scroll to “Back up or move your log” and press Download backup (.json).
- Save the file somewhere safe, such as your computer, cloud storage or email it to yourself. It is named with today’s date, for example fasting-toolkit-backup-2026-10-09.json.
Restore on another device or browser
- Copy the backup file to the new device.
- Open fastingtoolkit.com/fasting-log in the browser you want to use.
- Press Restore from backup and choose the file.
- Confirm the merge. Sessions and water entries are added to anything already there, and exact duplicates are skipped. Your weekly plan is restored only if the new browser does not have one yet.
Open your sessions in a spreadsheet
Export sessions (.csv) creates a file with one row per session and four columns: start, end, hours and planned_hours. Open it in Excel, Google Sheets or Numbers to sort, filter or chart your history. The CSV is for reading only; to restore data, use the .json backup.
| start | end | hours | planned_hours |
|---|---|---|---|
| 2026-10-06 20:00 | 2026-10-07 12:15 | 16.25 | 16 |
| 2026-10-07 19:30 | 2026-10-08 09:30 | 14.00 |
Privacy
Backups are created and read entirely in your browser. Nothing is uploaded to Fasting Toolkit. Once downloaded, the file is yours, so store it as you would any personal file. Anyone with the file can see the times it contains.
Reviewed October 2026 by Lee Palmer · How we write our guides · Report an error