Free Online Music & Audio Tools
25 free online music tools: BPM and musical key detection, sample editing, drum sequencer, MIDI generation and media conversion. Audio stays on your device.
Sample Slicer
Turn a loop into playable one-shots. Detect transients, edit slice boundaries and export a WAV or organized slice ZIP.
808 Tuner
Find the fundamental note and cents offset of a tonal bass sample, then tune it to your project.
Pocket Groove
Build four bars of drums with velocity, swing, seeded variation and MIDI, WAV or stem export.
Chord Compass
Explore diatonic chords, inversions, bass and arpeggios, with multi-track MIDI export.
Reference Desk
Compare two tracks with RMS level matching, sample peak, stereo correlation and relative spectrum.
Delivery Pack
Rename stems, detect identical files and bundle audio, notes and a manifest into one ZIP.
BPM Detector
Estimate tempo from spectral onsets and rhythmic periodicity. Compare half-time and double-time candidates with confidence guidance.
Musical Key Detector
Estimate a song's major or minor key using pitch-class energy and tonal profiles, with alternative keys and a chroma chart.
Audio Trimmer
Cut a precise time selection or remove leading and trailing silence, then export a clean WAV.
Peak Normalizer
Set a sample-peak ceiling while preserving the dynamics of the original recording.
Reverse Audio
Reverse a sample, texture or transition while retaining its channels and sample rate.
Fade Designer
Apply independent fade-in and fade-out times with linear or equal-power curves.
Mono Converter
Fold stereo to mono, or extract only the left, right, mid or side signal.
Stereo Width
Adjust the mid/side balance of stereo audio and check the resulting sample peaks.
DC Offset Removal
Remove each channel's mean offset to recenter the waveform around zero.
Polarity Inverter
Invert the left, right or both channels for practical phase and cancellation checks.
Spectrum & Dynamics
Inspect relative frequency energy, RMS, crest factor, sample peak, DC offset and stereo correlation.
Media Converter
Convert browser-supported audio to WAV, MP3, AIFF or browser-available OGG/WebM audio files.
Tone Generator
Generate a sine, triangle or band-limited saw/square test tone with precise frequency and duration.
Metronome
Create a tempo-accurate click track with bar accents and WAV export.
Tap Tempo
Tap along with music to estimate BPM from recent beat intervals and see timing consistency.
Delay Time Calculator
Convert tempo to straight, dotted and triplet delay times and modulation frequencies.
Loop Length Calculator
Calculate a loop's exact tempo from duration and bar count, or find the duration for a target tempo.
Scale MIDI Generator
Audition major, minor, pentatonic and modal scales, then export a MIDI practice or melody starting point.
BPM & Key Detector
Find the tempo and musical key of the same audio file in one analysis. Compare alternatives, confirm both values and export one report.