AnyTool Beat Maker generates each drum on the fly with the Web Audio API rather than loading audio files. The kick is a sine wave with a fast downward pitch sweep and a click transient; the snare is a filtered noise burst plus a short tonal body; the hats are bright high-passed noise with a short (closed) or long (open) decay; the clap is several tight noise bursts through a bandpass; the toms are tuned sine drops; and the rim and cowbell are short square-wave blips. Because they are synthesized, they sit close to classic 808/909-style sounds but are honest approximations, not note-for-note samples — and there is nothing to download and no CDN.

On a straight grid, all 16th notes are evenly spaced and the beat can feel stiff. The Swing control pushes the odd (in-between) 16th notes slightly later — at a low setting it adds a subtle bounce common in house and hip-hop, and at a high setting it approaches a triplet shuffle. AnyTool applies the delay precisely on the Web Audio clock when each step is scheduled, so the swing is consistent and the timing of the on-beat steps stays locked. Boom-bap and house presets ship with a touch of swing already dialled in.

Steps are scheduled on the AudioContext sample clock using the canonical "two clocks" lookahead loop — a 25-millisecond timer queues every upcoming step about 100 milliseconds ahead — so the groove is sub-millisecond accurate and does not drift, even when you change tempo, swing or step count while it plays. Keep the tab active and in the foreground for the tightest feel, since browsers throttle background tabs. Rendering the loop to a downloadable WAV or MP3 file is not part of this tool; instead you can save the pattern to your browser or copy a compact pattern code that captures the grid, tempo and swing to reopen or share later.

AnyTool Beat Maker runs entirely in your browser. The drums are generated as short oscillator and noise envelopes with the Web Audio API, so there are no sound files to fetch and nothing is streamed from a server. Saved patterns and pattern codes live only on your device — in localStorage or on your clipboard — and nothing is logged or tracked. The tool never requests microphone access; it only produces sound, it does not listen. It even works offline once the page has been cached.