Best Free Online Metronome: How to Choose One

Search for a free online metronome and you will find hundreds of pages that all look the same: a number, a play button, and a click sound. They are not the same. The difference between a good one and a bad one is invisible until you have practised with it for a few minutes — and by then you may have internalised timing errors that took months to build.

This guide is about how to judge one, with an honest account of where our own metronome fits and where it does not.

The four things that actually matter

1. The timing engine. A browser cannot use a JavaScript timer for musical time. setInterval and setTimeout run on the main thread beside layout, scripts and garbage collection, so they wander by tens of milliseconds under load. A well-built browser metronome uses the Web Audio API’s hardware clock and a lookahead scheduler — the pattern Chris Wilson documented in A Tale of Two Clocks — where clicks are queued in advance and rendered by the audio hardware itself. If a metronome’s code uses setInterval to trigger sound directly, it will drift.

2. What happens when the tab is hidden. Practising from a tablet while the browser is in the background is common. Browsers throttle timers in hidden tabs, so a naive metronome stops or stutters the moment you switch away. A lookahead scheduler survives this by widening its scheduling window — our metronome, for example, extends to 1.5 seconds when the page is hidden, which is enough to ride out the throttling.

3. The features you will actually use. A click at 120 BPM is table stakes. What separates tools is subdivisions (eighths, triplets, sixteenths), odd meters (5/4, 7/8), a tempo ramp for speed work, tap tempo for matching a recording, and a silent or visual mode for practice where sound is not an option.

4. Friction and privacy. A metronome should open and play. No account, no download, no microphone permission (a metronome has no reason to listen to your room), and no upload. Anything else is a product decision, not a musical one.

The realistic candidates

Option	Timing engine	Works offline	Subdivisions / odd meters	Cost	Best for
Google’s built-in metronome widget	Browser audio	No	Basic pulse only — no subdivisions, odd meters or ramp	Free	A quick tempo reference in search results
Free browser tools (this site included)	Web Audio lookahead (when built well)	No	Varies; the best ones cover subdivisions, odd meters and ramps	Free	Practice at a desk, tablet or laptop
Phone metronome apps	Native audio	Usually yes	Varies; often excellent	Free–paid	Practice away from a computer
Hardware metronomes	Dedicated clock	Yes	Varies by model	Paid	Band rooms, teaching studios, no-phone policies
DAW click track	Host audio engine	Depends	Full, tied to the project	With the DAW	Recording and production work

The honest summary: Google’s widget is fine for checking a tempo and useless for practising one, because it offers a single pulse and disappears when you leave the results page. Browser tools are the strongest free option for structured practice. Apps and hardware win on portability and offline use.

How to test any metronome in 60 seconds

You do not need to read source code to spot a bad timing engine. Three quick tests:

1. The slow-tempo test. Set 40 BPM and listen for two minutes. Timer drift is most audible at slow tempos, where a wandering click is obvious against silence.
2. The busy-tab test. Start the metronome, then open a heavy page in another tab for thirty seconds. A well-scheduled metronome keeps clicking without a stutter; a naive one lurches when you return.
3. The subdivision test. Turn on sixteenth notes and listen at 60 BPM. If the subdivisions wobble against the main beats, they are being scheduled separately rather than derived from the same clock.

Any tool that passes all three is using its audio clock properly. Most free pages on the first page of results fail at least one.

The feature checklist

Before you commit to a tool, check the list against what you actually practise:

• Subdivisions — eighths, triplets, sixteenths, with the main accent preserved. Essential for scale and technique work.
• Odd meters — at minimum 5/4 and 7/8, ideally with grouping accents (3+2, 2+2+3).
• Tempo ramp — automatic speed increases every few bars; the single most useful feature for building speed without fooling yourself.
• Tap tempo — measure a tempo from a recording instead of guessing.
• Visual / silent mode — a pendulum or screen indicator with the clicks muted, for apartments, stages and hearing protection.
• Shareable setups — a URL that carries tempo, meter and subdivision, so a teacher can send a student exactly the click they mean.

Where our metronome fits

Ours is a free browser metronome with a Web Audio lookahead scheduler, a draggable pendulum, meters from 1 to 7 beats, eighth/triplet/sixteenth subdivisions, tap tempo, a speed-trainer mode, a polyrhythm second voice, and a full-viewport stage mode that keeps working silently. It needs no account, asks for no microphone permission, and does nothing with your data.

It is also honest about its limits: it is a browser tool, so it needs a connection the first time and does not work offline; there is no phone app; and if you want haptic feedback or a device that lives in your gig bag, a hardware metronome or a wearable is the right purchase.

For the practice that most people actually do — a desk, a laptop or tablet, a structured session with subdivisions and tempo work — it is the free option we would recommend, because we built the timing engine to be the part you never have to think about. Try it at /tools/metronome/ with a specific setup: ?bpm=72&sig=4&sub=2 is a good default for slow technique work.

The short answer

If you want one sentence to take away: the best free online metronome is the one that schedules its clicks on the audio hardware clock, keeps playing when the tab is hidden, and covers subdivisions and odd meters — and among those, pick the one whose interface you will actually open every day. Everything else is decoration.

For the next step, read how to practise with a metronome or compare metronome apps and hardware if you are deciding what to buy.