Free Tools — free browser utilities for musicians

Audio Analysis Console

Drop in any audio file and see exactly what's going on inside it — a full readout of your track, right in the browser.

• Instant analysis
  Drop a WAV or MP3 and the console breaks it down in seconds — no uploads, no waiting.
• Visual readouts
  See your audio at a glance — waveform and frequency content laid out clearly.
• File details
  Sample rate, channels, duration, and format — everything you need to know about the file.
• 100% private
  Your audio is analyzed entirely on your device. Nothing is sent to any server.

BPM Tapper

Tap along to any song and instantly know its tempo. No uploads, no waiting — just tap and read the BPM.

• Tap-to-detect
  Click or tap any key in time with the beat — the tool averages your taps and locks in the exact BPM.
• Smart averaging
  Outliers are automatically discarded so one mistimed tap won't throw off the result.
• Half & double time
  The tool suggests if the track might be at half-time or double-time, so you never misread the groove.
• Copy & paste
  One click copies the BPM to your clipboard — drop it straight into your DAW or notes.
• 100% private
  No audio is recorded or uploaded. Everything happens in your browser.

Key & Scale Finder

Drop in a song or hum a melody and the tool tells you the key, scale, and compatible chords — instantly.

• Audio or MIDI input
  Drop a WAV, MP3, or MIDI file — or use your microphone to hum the melody directly into the tool.
• Key + scale detection
  Identifies major, minor, and modal scales with confidence scoring so you know how sure the result is.
• Relative & parallel keys
  See the relative minor/major and parallel key at a glance — essential for modulation and remixing.
• Compatible chords
  Instantly see the diatonic chord progression for the detected key — start writing immediately.
• 100% local
  All analysis runs in your browser. Your audio never leaves your device.

Browser Metronome

A rock-solid metronome that runs in your browser — precise, adjustable, and always ready when you practice.

• 20–300 BPM range
  From ultra-slow practice tempos to blistering speed drills — dial in exactly what you need.
• Tap tempo
  Tap the button in time and the metronome matches your feel — no manual BPM entry needed.
• Accent beats
  Set the first beat of every bar to ring louder — essential for keeping your place in odd time signatures.
• Visual & audio cues
  Choose click, woodblock, or hi-hat sounds — or follow the swinging pendulum visually.
• No install needed
  Opens in any browser on any device — phone, tablet, or laptop. Bookmark it and go.

Chord Progression Generator

Break through writer's block with instant chord progressions in any key, style, or mood — then export to MIDI.

• Any key, any mode
  Pick a root note and choose from major, minor, Dorian, Mixolydian, and more — the tool builds diatonic progressions that actually work.
• Style presets
  Pop, jazz, lo-fi, cinematic, EDM — each preset biases the generator toward progressions that fit the genre.
• Lock & reroll
  Love the first two chords? Lock them in and regenerate the rest until the progression feels right.
• Export to MIDI
  Download the progression as a MIDI file — drag it straight into Ableton, Logic, FL Studio, or any DAW.
• Play & preview
  Hit play to hear the progression before you export — built-in synth, no setup required.

Delay Time Calculator

Enter your BPM and get precise delay times in milliseconds — dotted, triplet, and straight divisions for any plugin.

• All note divisions
  Whole, half, quarter, eighth, sixteenth — plus dotted and triplet variants for every value.
• Hz conversion
  See the equivalent frequency in Hz — useful for syncing LFOs, tremolo, and modulation effects.
• Copy-ready values
  Click any value to copy it — paste straight into your delay plugin's time field.
• Pre-delay for reverb
  Includes a dedicated pre-delay column — set the gap between dry signal and reverb tail perfectly.
• Save presets
  Store your most-used BPMs locally — one click recalls all delay times for your project tempo.

Frequency to Note

Convert any frequency in Hz to its nearest musical note, octave, and cents deviation — essential for tuning and sound design.

• Instant conversion
  Type any Hz value and see the closest note, octave, and how many cents sharp or flat it is.
• A4 = 440 or 432
  Switch between standard concert pitch and alternative tunings with one toggle.
• Reverse lookup
  Enter a note name and octave to get its exact frequency — useful for setting oscillator pitches.
• Harmonic series
  See the first 16 harmonics of any fundamental frequency — plan your additive synthesis patches.
• Copy results
  One-click copy for note name, frequency, or cents — paste into your synth or tuner.

Sample Rate Converter

Convert audio between 44.1, 48, 88.2, 96, and 192 kHz — right in your browser, with no quality loss from unnecessary re-rendering.

• All standard rates
  44.1, 48, 88.2, 96, 176.4, and 192 kHz — cover every DAW, streaming platform, and mastering spec.
• Bit-depth options
  Choose 16, 24, or 32-bit float output — match the destination spec exactly.
• Batch conversion
  Drop a whole folder of files — convert them all in one go, keeping filenames intact.
• 100% local
  Your audio is processed entirely in the browser. Nothing is uploaded to any server.
• WAV & FLAC
  Input and output in lossless formats — no generation loss from MP3 re-encoding.

MIDI Note Mapper

Convert between note names, MIDI note numbers, and frequencies — the reference every producer keeps open in a tab.

• Three-way lookup
  Enter a note name, MIDI number, or frequency — the tool fills in the other two instantly.
• Full keyboard range
  Covers MIDI 0–127 — from the deepest sub-bass to the highest piccolo range.
• Velocity & CC reference
  Quick lookup for common MIDI CC numbers — modulation, expression, sustain, and more.
• Drum map
  Standard General MIDI drum map — kick, snare, hi-hat, toms, cymbals, and every percussion slot.
• Copy & paste
  Click any value to copy it — drop note numbers straight into your piano roll or sampler.

Tap Tempo to MS

Tap in a tempo and get millisecond values for reverb pre-delay, compression release, and sidechain timing — instantly.

• Tap or type
  Tap the button to set tempo by feel, or type a BPM directly — both update all values in real time.
• Reverb pre-delay
  Dedicated column for pre-delay values — set the gap between dry and wet for natural-sounding reverbs.
• Compression release
  See release times that groove with the track — no more guessing "fast" or "slow" on your compressor.
• Sidechain timing
  Get the exact trigger and release times for ducking that sits perfectly in the pocket.
• Copy any value
  Click to copy any MS value — paste directly into your plugin's time parameter.

Pitch Calculator

Calculate pitch shift in semitones and cents, time-stretch ratios, and sample rate transposition — all in one place.