Health & Fitness · Free tool
Fasting Timer
Start a fasting timer for 16:8, 18:6, 20:4, OMAD, or a custom schedule. Shows elapsed, remaining, and eating window.
Updated April 2026
Started at —
Not started
00:00:00
16:00:00 remaining to 16h target
Target: 16:00:00 (16h)
Estimate only — consult a doctor or RD for medical advice.
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What it does
Start a fasting timer for 16:8, 18:6, 20:4, OMAD, or a custom schedule. Shows elapsed, remaining, and eating window.
Runs entirely in your browser — no upload, no account, no watermark. For more tools in this category see the full tools index.
How to use it
- Fill in the inputs or drop your file.
- Click the primary button to run.
- Copy or download the result.