PanDev Tools

Free audio tools

Cut, convert, join and analyze audio files, or practice music with a metronome, guitar tuner, virtual piano and chord finder. All 14 tools run in your browser with the Web Audio API, so your files never leave your device and there is nothing to install.

14 tools. All of them run on your device, and nothing is uploaded.
Audio CutterTrim MP3, WAV and other audio on a waveform: select a region, add fades and export the clip, or cut the middle out.Popular Audio ConverterConvert MP3, WAV, OGG, M4A, FLAC or WebM audio to MP3 or WAV, with optional mono downmix and resampling. Batch friendly. Volume Booster & NormalizerMake audio louder or quieter, or peak-normalize it to a target level, with a soft limiter that prevents clipping. Speed & Pitch ChangerSpeed audio up or slow it down with or without changing pitch, or transpose it by semitones. Reverse AudioPlay any audio file backwards and download the reversed version as MP3 or WAV. Audio JoinerCombine several audio files into one track in the order you choose, with an optional crossfade between them. Voice RecorderRecord your voice from the microphone with a live level meter, pause/resume, and save takes as WebM, WAV or MP3. MetronomePrecise online metronome with tap tempo, time signatures, accents, subdivisions and three click sounds. BPM Tap Tempo & DetectorTap along to find the tempo of any song, or upload a track and detect its BPM automatically. Guitar & Instrument TunerTune guitar, bass, ukulele or violin with your microphone: note name, cents needle and frequency in real time. Tone & Frequency GeneratorGenerate sine, square, sawtooth or triangle tones from 20 Hz to 20 kHz, or white, pink and brown noise. Export as audio. Virtual PianoPlay a two-octave piano with your mouse, touch or computer keyboard. Shape the synth sound, use sustain and record what you play. Audio Info & SpectrumInspect any audio file: duration, sample rate, channels, peak, RMS and loudness, plus a live spectrum analyzer and a spectrogram. Chord FinderPick a root and chord type to see its notes, guitar fingering diagrams and piano keys, then hear it played.

Frequently asked questions

Are my audio files uploaded anywhere?

No. Files are decoded by your browser's Web Audio API, and editing and MP3 encoding happen in JavaScript on your own device. The only extra download is the open-source MP3 encoder script, fetched the first time you export an MP3. Nothing you open or record is sent to a server.

Which audio formats can I open and save?

You can open anything your browser can decode, which in Chrome, Edge and Firefox includes MP3, WAV, M4A/AAC, FLAC, OGG, Opus and WebM. Safari support for OGG depends on the version. The editing tools save MP3 at 96 to 320 kbps or 16-bit WAV.

Do these audio tools work on a phone?

Yes. The cutter, converter, voice recorder, tuner, metronome, piano and the rest work in Safari on iPhone and Chrome on Android. Whole files are decoded into memory as uncompressed audio, so very long recordings can be slow on phones with little RAM. On iPhone, turn off silent mode if you hear nothing.

Are the audio tools really free?

Yes. Every tool is free to use with no account, no watermark on exported files and no cap on how many files you process. The only practical limit is your device's memory and processing speed, since all the work happens locally in your browser.

Other categories

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