Is this tool free to use?

Yes, this tool is completely free to use. No registration, subscription, or payment is required. All processing happens directly in your browser.

Does this tool upload data to a server?

No. All processing happens locally in your browser using JavaScript. Your data never leaves your device, ensuring complete privacy and security. The tool works even when offline.

Does this tool work on mobile devices?

Yes, this tool is fully responsive and works on all modern browsers including Chrome, Safari, Firefox, and Edge on desktop, tablet, and mobile devices.

Is an internet connection required to use this tool?

No internet connection is required after the page loads. Since all processing happens in your browser, you can use this tool offline once the page is loaded.

Is there a file size limit?

There is no server-side file size limit since files are processed locally in your browser. The only limitation is your device's memory (RAM). For very large files, we recommend processing them in smaller chunks.

⏱️ Interval Timer

Free online interval timer for HIIT, Tabata, running and circuit training. Customize work/rest durations and rounds. Features sound alerts and visual progress indicators. Perfect for your workout routine.

Work Time (s)

Rest Time (s)

Rounds

Prep Time (s)

Cool Down (s)

⏱️

00:00

Ready

Round: 0/8 Total: 0s

Presets

💡 Tip: Sound alerts play at each phase change. Make sure your volume is on.

How to Use the Interval Timer

Work with audio using the Interval Timer in three steps:

Upload or Record Audio
Upload an audio file (MP3, WAV, OGG, etc.) or use the built-in recorder to capture audio directly. Your audio stays on your device.
Configure Audio Settings
Adjust audio processing options such as speed, pitch, volume, or effects. Preview changes in real time.
Download the Result
Click "Download" to save the processed audio file. You can also copy a shareable link if applicable.

FAQ

什么是间歇计时器？

间歇计时器用于控制训练中的工作和休息时间交替循环。例如Tabata训练法采用20秒工作+10秒休息的模式，HIIT训练通常采用30秒-60秒工作配合30秒-90秒休息的比例。

适合哪些训练？

本计时器适合HIIT高强度间歇训练、Tabata训练、跑步间歇训练、力量训练组间休息、瑜伽流序列计时、拳击回合计时等各类间歇性训练场景。

声音提示是怎样的？

每个阶段开始和结束时有声音提示。工作阶段开始会发出短促的哔声，结束时有长音提示。休息阶段同样有声音区别。最后一组完成后会有三声提示音。

可以设置多个不同的阶段吗？

本工具支持自定义工作和休息时长，以及总轮数。你可以先热身（可选），然后进入工作-休息循环，最后可以设置冷却时间（可选）。所有时间都可以自由调节。