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Customizable interval training timer with work/rest periods and audio cues.
HIIT Timer is a free online tool in the Health category. Use it directly in your browser — no signup, no download, no account required. Works on desktop, mobile, and tablet.
HIIT Timer is part of OneTool — a collection of 60+ free browser-based tools for finance, productivity, developer utilities, PDF tools, and more. All tools are completely free, require no signup, and store data locally in your browser.
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