Tone Generator (Web Audio)
Generate precise sine, square, sawtooth, and triangle waves at any frequency. Live waveform display, adjustable volume, and frequency slider for tuning, testing speakers, and audio experiments.
Your tools stop working when the Wi-Fi does
The Musician's Knife is the answer
Field work. Remote locations. Unreliable connections. Air-gapped environments. Cloud tools become expensive paperweights. Every tool works offline, forever. Open the HTML file, do your work. No login, no sync, no server required.
The Musician's Knife is a single-file knife with 11 tools that runs entirely in your browser. The Musician's Knife gives musicians eleven practical tools in a single HTML file, powered by the Web Audio API for real sound generation. Generate precise tones, tune your instrument with a live chromatic tuner, keep time with a visual metronome, tap out BPM, look up chords and scales on an interactive piano, explore the circle of fifths, reference note frequencies, generate DTMF tones, train your ear with intervals and chord recognition, and play a live MIDI keyboard with WAV recording — all completely offline.
WHAT'S INSIDE
11 tools in a single HTML file
Chromatic Tuner
Live microphone pitch detection with an analogue needle display. Shows detected note, cents deviation, and frequency. Lock to a specific note for targeted tuning. Adjustable A4 reference (415–466 Hz).
Visual Metronome
Rock-solid tempo from 20–300 BPM with time signatures from 1 to 12 beats. Visual beat indicators, accent on beat one, adjustable volume, and keyboard shortcuts for hands-free control.
BPM Tap Counter
Tap along to music and get an accurate BPM reading averaged over your taps. Shows individual tap intervals, running average, and instant visual feedback. Reset and re-tap anytime.
HOW IT WORKS
Three steps. No setup.
1
Download the file
Purchase The Musician's Knife and download a single HTML file. No installer, no account, no setup.
2
Open in any browser
Double-click to open in Chrome, Firefox, Safari, or Edge. Works on any operating system.
3
Start working
Your data stays in your browser's local storage. Nothing is uploaded. Ever.
COMPLIANCE & GEOGRAPHY
Global
Works in any country. No server dependency, no regional restrictions.
FAQ
Frequently Asked Questions
How does The Musician's Knife solve the working without internet problem?
The Musician's Knife runs entirely in your browser. Field work. Remote locations. Unreliable connections. Air-gapped environments. Cloud tools become expensive paperweights. Every tool works offline, forever. Open the HTML file, do your work. No login, no sync, no server required. Tone generator, chromatic tuner, metronome, BPM tap counter, chord finder, scale visualiser, circle of fifths, frequency table, DTMF generator, ear trainer, and MIDI studio with WAV recording. Real sound from a single file.
Is my data safe with The Musician's Knife?
Yes. The Musician's Knife is a single HTML file. It never connects to any server. Your data stays in your browser's local storage on your device.
What makes The Musician's Knife different from cloud tools?
Cloud tools require internet, charge subscriptions, and store your data externally. The Musician's Knife is a one-time purchase ($39), works offline, and never transmits data.
Is The Musician's Knife really just one file?
Yes. The Musician's Knife is a single HTML file containing 11 tools. Download it, open it in any browser, and start working. No installation, no dependencies, no accounts.
No cloud One fileOne-time purchase
Get The Musician's Knife — $39Sovereignty as a Service