Audio Tools

Process audio in your browser—trim, merge, convert formats, normalize levels, and more. Private, fast, and no server uploads required.

43 tools available

AI Tools 1

AI Speech to Text

Free Whisper AI speech to text in your browser. Transcribe audio & video to SRT, VTT, JSON. Runs on-device with WebGPU/WASM, no upload, unlimited.

Audio Tools 33

Note Frequency

Instrument tuner reference: convert notes to Hz with cents deviation, MIDI numbers, overtone/harmonic series, interactive piano. A=432/440/415 presets.

AI Music Genre Classifier

Detect music genre and 400+ styles with AI, 100% in-browser, no upload, free, no signup. Discogs EffNet model with per-segment timeline and CSV/JSON export.

AI Vocal Remover

On-device U-Net AI vocal remover: split any song into vocal & instrumental WAV stems. No upload, karaoke & acapella ready, true-peak clip-safety check.

Audio Compare

Compare two audio files with AB testing: integrated LUFS, true peak dBTP, loudness match and spectral analysis. MP3 vs FLAC, bitrate and master QC.

Audio Compressor

Free dynamic range compressor with LUFS loudness check and one-click normalization to -14/-16/-23 LUFS targets, in your browser, nothing uploaded.

Audio Converter

Convert audio between MP3, WAV, OGG, AAC, FLAC and OPUS in your browser. Bitrate, sample-rate and mono/stereo control, all local, no upload required.

Audio Denoiser

Free audio denoiser with afftdn FFT spectral subtraction, adaptive noise profile, noise gate and 50/60Hz hum removal. FLAC/WAV. In-browser, no upload.

Audio Equalizer

Free online 31-band graphic & parametric EQ with LUFS loudness, true-peak (dBTP) metering, spectrum, HPF/LPF. Export MP3/FLAC. No upload, in browser.

Audio Fade

Free audio fade in/out tool with logarithmic, exponential and sine fade curves. Process MP3, WAV, OGG, AAC, M4A, FLAC in-browser. No upload, no watermark.

Audio Joiner

Free audio joiner: merge MP3, WAV, M4A, podcast episodes with crossfade, silence gap and normalize loudness. No upload, runs in your browser.

Audio Metadata Viewer

Free online audio metadata viewer. Read ID3 tags, album art, artist, title, bitrate, codec from MP3, FLAC, M4A, OGG, WAV and more. View all audio file information.

Audio Normalizer

Normalize audio loudness to LUFS (EBU R128) with true-peak dBTP ceiling: Spotify -14, Apple -16, broadcast -23. Plus channels, bitrate, samplerate.

Audio Recorder

Free WAV audio recorder: lossless stereo 48 kHz capture, live waveform, voice-activity auto-stop, plus EBU R128 LUFS and true-peak (dBTP) compliance check.

Audio Reverser

Reverse audio online and export real MP3 (320/192/128 kbps) or WAV. Create reverse reverb, backmasking and sound design effects privately in your browser.

Audio Silencer

Free audio silencer with waveform: insert silent gaps or mute/bleep sections with anti-click fade. No pop, no click. Podcast, broadcast. MP3, WAV, OGG.

Audio Splitter

Split MP3 & WAV by time, parts, size or custom timestamps. 100% private in-browser processing, no upload, sample-accurate lossless WAV output.

Audio Trimmer

Trim audio in your browser with lossless Copy mode, millisecond-precise cuts and fade in/out. 100% private, no upload. MP3, WAV, FLAC, AAC, M4A and more.

Audio Volume Booster

Boost audio up to 300% with a true-peak limiter (no clipping) or normalize to exact LUFS for Spotify, YouTube, Apple and broadcast. In-browser, private.

Audio to MIDI

Browser-based audio to MIDI converter using YIN pitch detection. No upload, piano-roll preview, quantize to grid, DAW-ready .mid export for vocals & solos.

BPM Detector

Drop in any MP3/WAV/FLAC — get the BPM (tempo) instantly with a confidence score. Includes manual tap-tempo. No upload, runs in your browser. Free.

Channel Mixer

Free online channel mixer and vocal remover. Make karaoke tracks, downmix stereo to mono, swap L/R, isolate vocals, convert mono to stereo. MP3, WAV, OGG.

Key Detector

Find the musical key, BPM and Camelot code of any song. Real-time pitch tuner included. Krumhansl-Schmuckler algorithm, browser-based.

Loudness Meter

Measure integrated, short-term and momentary LUFS plus true-peak and LRA per EBU R128 / ITU-R BS.1770. Free in-browser loudness meter for podcasts and music.

Metronome

Pro online metronome with tap tempo, subdivisions, speed trainer and per-beat accents for odd meters. Export WAV click tracks with count-in for your DAW.

Silence Detector

Free silence detector. Find dBFS dead air in audio, export CSV/EDL timecodes (MM:SS.mmm) of silence + keep segments for DAW, Premiere, or ffmpeg edits.

Silence Trimmer

Top and tail podcasts, voiceovers and audiobooks: trim leading and trailing dead air while keeping internal pauses. dB threshold, peak meter, in-browser.

Spectrum Analyzer

Real-time audio FFT analyzer with switchable FFT size (512-16384) and live dBFS readout. Spectrum, bars, waveform views. Runs in-browser, no upload.

Speed & Pitch

Transpose any track ±12 semitones plus cents and time-stretch 0.5×–2.0× independently. Pure pitch shift keeps duration; source sample rate preserved.

Stereo Mono Converter

Stereo to mono downmix converter, 100% in-browser via FFmpeg.wasm. Pick the downmix law (0.5 or -3 dB L+R sum), check phase correlation and peak. FLAC, Opus.

Text to Speech

Free text to speech with natural AI voices. Adjustable rate & pitch, word highlighting for proofreading, accessibility reader. Private, offline, no signup.

Tone Generator

Generate sine, square, sawtooth, sweep (chirp) tones and pink/white noise. Set frequency, dBFS level, A4=440 reference. Export 48/96 kHz, 24-bit WAV.

Waveform Viewer

Free audio waveform viewer with a real windowed STFT spectrogram, selectable FFT size and window, dBFS peak meters, stereo split and 100x zoom. No upload.

White Noise Generator

Pro noise generator: download WAV/MP3/OGG pink, brown & white noise with peak/LUFS metering, true-peak safe normalize, 10-band EQ and binaural beats.

Developer Tools 1

Encoding 1

Morse Code Translator

Translate text to International Morse code and back with audio at adjustable WPM, tone Hz and Farnsworth timing. Letters, numbers, punctuation, @ and prosigns.

Hardware Tools 3

Diagnostics 3

Audio Latency Tester

Free browser audio latency tester. Reports Web Audio base + output latency in ms, sample rate and buffer size, with CSV/JSON export and pass/fail check.

Microphone Tester

Test your mic in-browser with a live dBFS RMS/peak meter, clipping detection and CSV/JSON export. No download. Works in Chrome, Edge, Firefox, Safari.

Speaker Tester

Free online speaker, headphone and sound test. Play a 440 Hz tone or frequency sweep, test left and right channels, and read the live Hz where a rattle hits.

Time Tools 1

Audiobook Speed Calculator

See remaining listening time at 1×–3×, the daily minutes and player speed you need, and the calendar date you finish an audiobook or podcast by your deadline.