Online MetronomeA precise digital metronome for musicians and music practice.
Online Metronome
A precise digital metronome for musicians and music practice.
Set BPM
Adjust the tempo with the BPM slider or type a specific value.
Choose Time Signature
Select your time signature (4/4, 3/4, 6/8, etc.).
Start
Click Start to begin the metronome. Accent beats are highlighted.
What Is Online Metronome?
The Online Metronome is a precise, browser-based metronome for musicians and music students. Set your desired BPM (beats per minute), choose a time signature, and start practicing with a steady, accurate beat. The metronome uses the Web Audio API's OscillatorNode for sample-accurate timing that doesn't drift like setTimeout-based metronomes. Features include adjustable tempo (20-300 BPM), common time signatures (4/4, 3/4, 6/8, 5/4, 7/8), accented first beats, and a visual beat indicator. Tap tempo lets you set the BPM by tapping along to a song.
Why Use Our Online Metronome?
- Sample-accurate timing using Web Audio API scheduling
- Multiple time signatures including compound meters
- Tap tempo feature to match existing music
- Visual beat indicator alongside audible clicks
Common Use Cases
Instrument Practice
Maintain steady tempo while practicing scales, exercises, or pieces.
Band Rehearsal
Use as a reference tempo for band practice sessions.
Songwriting
Set a consistent tempo while composing or recording demos.
Exercise
Maintain a steady pace for activities like jump rope, running cadence, or dance practice.
Technical Guide
The metronome uses Web Audio API scheduling for sample-accurate timing. Instead of setTimeout (which drifts due to JavaScript event loop delays), the metronome schedules click sounds using AudioContext.currentTime. A scheduler function runs at ~25ms intervals using setInterval but only uses it to schedule future Web Audio events. Click sounds are generated by OscillatorNodes: the downbeat (accent) uses a higher frequency (1000 Hz) and the other beats use a lower frequency (800 Hz). Each click is a short sine wave burst (50ms) with a quick attack and decay envelope applied via GainNode scheduling. The beat interval is calculated as 60 / BPM seconds. A visual indicator uses requestAnimationFrame synchronized with the audio scheduling. Tap tempo averages the intervals between the last 4 taps to determine BPM.
Tips & Best Practices
- 1Start slow and gradually increase tempo for effective practice
- 2Use the accent pattern to emphasize downbeats in your time signature
- 3Tap tempo is useful for matching the tempo of a song you're learning
- 4Practice with a metronome regularly to develop a strong internal sense of timing
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Audio ToolsFrequently Asked Questions
QHow accurate is the timing?
QWhat time signatures are available?
QWhat is tap tempo?
QCan I change the click sound?
QDoes it work on mobile?
About Online Metronome
Online Metronome is a free online tool from FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration required. No ads. Just fast, reliable tools.