Audio File Utilities
Online audio format converter, trimmer/cutter, speed changer, pitch shifter, auto-tune pitch correction preview, silence remover, loop maker, audio reverser, vocal range test, and formant analyzer — all processing happens in your browser, no files are uploaded anywhere.
Available Tools
Audio Format Converter
Load an MP3, OGG, FLAC, M4A or WAV file and export a lossless 16-bit WAV — decoded and converted entirely in your browser, nothing uploaded. Exports WAV only (browsers can’t encode MP3/AAC from JavaScript).
Launch tool →Audio Trim Tool
Load an audio file, set precise start/end times with a selection bar, and export just that section as a lossless WAV — sample-accurate, no re-encoding loss, all in your browser. Nothing uploaded.
Launch tool →Audio Speed Changer
Speed up or slow down audio from 0.25× to 4×. Speed and pitch change together (vinyl/tape-style varispeed) — slow down tricky passages or speed up lectures. Live preview, waveform, and lossless WAV export, all in your browser. Nothing uploaded.
Launch tool →Audio Pitch Shifter
Shift audio pitch up or down by semitones and cents (up to ±1 octave) while keeping the same duration — the tempo stays put. Uses a granular overlap-add method (approximate, not a studio phase vocoder), with preview and lossless WAV export. All in your browser, nothing uploaded.
Launch tool →Real-Time Pitch Correction Preview
Sing into your mic and see, live, the note you’re on, the nearest note in your chosen key & scale, and where auto-tune would snap it — with adjustable correction strength. A visualizer (it shows correction, it doesn’t alter your audio). Nothing recorded or uploaded.
Launch tool →Mono to Stereo Converter
Convert mono to stereo (dual mono, with optional Haas widening — honest pseudo-stereo, not invented spatial info), downmix stereo to mono with (L+R)/2, or adjust stereo width via mid/side. Preview original vs converted; export lossless WAV. Nothing uploaded.
Launch tool →Audio Reverser
Play audio backwards — reverse the whole file or just a selected region, preview the result, and export a lossless WAV. Sample-exact, no quality loss; for backmasking, reverse-reverb effects, and sound design. All in your browser, nothing uploaded.
Launch tool →Silence Remover
Automatically cut silent sections from audio — adjustable threshold (dB), minimum length, and keep-padding, with a waveform showing what gets removed. Level-based gating (not speech detection); export lossless WAV. Great for podcast and lecture cleanup. Nothing uploaded.
Launch tool →Audio Duration Calculator
Work out duration from file size and bitrate, file size from duration, or how many hours fit in a given storage capacity — for any MP3/AAC/Opus bitrate or PCM/WAV settings. A pure calculator (no files uploaded), with a size-per-hour reference table.
Launch tool →Loop Audio Maker
Create seamless audio loops — set loop start/end, apply an equal-power crossfade for gapless seams, preview it looping, and export the single loop or several repeats as a lossless WAV. For music, games, and ambient backgrounds. Nothing uploaded.
Launch tool →Audio Loop Analyzer
Estimate a loop’s BPM (with a confidence rating and ×2/÷2 correction), see a beat & bar grid on the waveform, get suggested bar lengths, and check how cleanly it loops. Tempo detection is an estimate — BPM is adjustable. Nothing uploaded.
Launch tool →Vocal Formant Frequency Analyzer
Hold a sustained vowel into your mic and see its formant frequencies (F1, F2, F3) estimated live by LPC, plotted on a vowel-space chart with a nearest-vowel guess. Approximate & speaker-dependent — for linguistics, voice coaching, and singing curiosity. Nothing recorded.
Launch tool →Vocal Frequency Range Tool
Sing your lowest and highest notes and see your range in musical notes, Hz, and octaves, with an approximate voice-type estimate (bass to soprano) and famous-singer examples. Live mic, nothing recorded; range & type are rough snapshots.
Launch tool →