Online Music Tools

Free music utilities for musicians, producers and enthusiasts. Metronome, BPM calculator, frequency converter, note equivalency and more.

Audio Storage Calculator: WAV, FLAC and MP3 File Size

Estimate the disk space needed for your audio recordings in WAV, FLAC and MP3 based on sample rate and bit depth.

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BPM to Milliseconds Calculator for Delay and Reverb

Convert your project tempo (BPM) into exact delay times (ms) and frequencies (Hz). The essential tool for setting delays, reverbs and compressors with rhythmic precision.

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Frequency to Musical Note Converter

Convert hertz to musical notes instantly. Identify the exact note of any frequency, measure the deviation in cents, hear the pure tone and tune synthesisers and samplers with precision.

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Online Metronome: High Precision Visual and Audio

Free online metronome for musicians. Millisecond precision with Web Audio API. Visual, audio and Tap Tempo. Perfect for instrument practice.

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Music Note Equivalency: Latin, Anglophone and German Systems

Interactive translator of musical notes between Latin (Do, Re, Mi), Anglo-Saxon (C, D, E) and Germanic (H) systems. Includes piano visualizer, octaves and frequencies (Hz).

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Phase Distance Calculator for Microphones

Calculate the delay and compensation needed to align microphones. Avoid phase cancellation and comb filtering with sample-accurate precision and temperature adjustment.

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Guitar String Tension Calculator

Estimate the tension of every guitar string from its gauge, scale length and tuning. Compare the feel of complete string sets offline in metric or imperial units.

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What you will find in this category

Online metronome with Web Audio API - millisecond precision
BPM to milliseconds calculator for delays and reverbs
Frequency to musical note converter (Hz, cents and detuning)
Phase distance calculator for microphone alignment
Note equivalency between Latin, American and German systems
Digital audio storage calculator

# Music Tools for Every Stage of the Creative Process

From the first rehearsal to the final mastering, every musician and producer needs precise tools available at any time. Our collection of online music utilities has been designed with one clear goal: maximum technical precision with minimum friction.No installation required. All tools run directly in your browser, are completely free and protect your privacy: no data leaves your device.

# For the Practising Musician

The online metronome is the fundamental tool for any musician in training or in practice. Our metronome uses the Web Audio API to guarantee millisecond precision, eliminate drift and provide visual feedback with a ripple effect. The Tap Tempo feature lets you instantly find the BPM of any song.

# For the Music Producer

The BPM to milliseconds calculator is essential in any mixing session. Syncing a delay or reverb to the song tempo makes the difference between a mix that breathes and one that sounds artificial. Similarly, the phase distance calculator aligns microphones with sample-level precision and prevents phase cancellation in multi-microphone recordings.

# For the Sound Engineer

The frequency to musical note converter transforms any Hz value to its equivalent note, also showing the deviation in cents. Perfect for tuning analogue synthesisers, identifying problematic resonances in a room, or working with off-pitch samples. The digital audio storage calculator helps plan recording projects and manage disk space with precision.

Technical Precision

All tools are based on mathematically verified algorithms. No approximations: results are exact and reproducible.

Full Privacy

Processing happens on your device. No audio, file or personal data is transmitted to any server.

# The Universal Language of Music

Music is a language with multiple notation systems. The note equivalency tool instantly translates between the Latin system (Do, Re, Mi...), the American system (C, D, E...) and the German system (C, D, E... with H instead of B), avoiding confusion when communicating with musicians from different traditions or reading scores from different countries.
No installation needed
All tools run directly in the browser, with no plugins or additional apps. Bookmark this page to have them always at hand during your sessions.