Audio tools
Convert, trim, normalize and edit audio right in your browser — MP3, WAV, OGG and more. Nothing is uploaded.
Convert AIFF to FLAC
Convert AIFF or AIF audio to lossless FLAC in your browser — preserve samples and textual tags, choose FLAC compression level 0-12, and download the result.
Bleep or Mute Regions of an Audio File
Censor an audio file in your browser — bleep, mute, or duck the exact time regions you pick. Set a tone frequency and output format. Nothing is uploaded, free.
Audio Channel Tool
Swap left/right channels, downmix stereo to mono, up-mix mono to stereo, or copy one side onto both — right in your browser. Nothing is uploaded, free.
Compress an Audio File
Shrink MP3, WAV, M4A or any audio file right in your browser — pick a target bitrate (96 kbps default) and format. Nothing is uploaded, free.
Compress Audio Dynamic Range
Even out loud and quiet parts of an audio file in your browser with threshold, ratio, attack, release and make-up gain. Local and private.
Convert an Audio File
Convert any audio file to MP3, WAV, OGG, FLAC or M4A right in your browser — pick a bitrate for lossy formats. Runs locally, nothing is uploaded, free.
Remove Clicks and Pops from Audio
Repair vinyl clicks, pops, crackle, tape ticks and digital glitches in an audio file right in your browser. Nothing is uploaded, no sign-up, free.
Trim Leading & Trailing Silence
Cut dead air at the start and end of a recording while leaving middle pauses untouched — set a threshold and edge pad. Runs locally, nothing uploaded.
Add Effects to an Audio File
Add reverb, echo, chorus, tremolo and compression to audio in your browser — chain effects in one pass and download MP3, WAV or more. No upload.
Equalize an Audio File
Equalize any audio file right in your browser — boost or cut bass, mid and treble in dB, then save as MP3, WAV and more. Nothing is uploaded, free.
Fade an Audio File In and Out
Add a smooth fade-in and fade-out to any audio file right in your browser — pick the lengths in seconds. Nothing is uploaded, free.
Audio Filter
Apply a low-pass, high-pass, band-pass, or notch filter to audio in your browser. Set the frequency and band width, then download — nothing is uploaded.
Fit Audio to an Exact Length
Make any audio file an exact number of seconds — pad it with silence when it's short or trim it when it's long. Runs in your browser, nothing uploaded.
High-Pass Filter Audio
Apply a high-pass (low-cut) filter to audio in your browser — set a cutoff frequency to strip rumble, hum, and handling noise.
Brick-Wall Audio Limiter
Brick-wall limit an audio file so it never clips. Set the ceiling in dBFS plus input gain, attack and release — it all runs in your browser.
Loop an Audio File
Loop any audio file right in your browser — repeat a short sound to a target duration or a number of plays, saved as MP3, WAV and more. Free.
Strip Audio Metadata
Remove ID3 tags, comments, chapters, and cover art from MP3, FLAC, OGG, M4A, WAV, and other audio files in your browser. Stream-copy audio, no upload.
Gate Background Noise Out of Audio
Gate hiss, hum and room tone out of quiet gaps in audio. Set threshold, reduction, ratio, attack and release — all in your browser.
Reduce Audio Background Noise
Remove steady background hiss and hum from an audio file right in your browser — pick a strength, choose a denoiser, download. Runs locally, nothing is uploaded, free.
Normalize Audio Loudness
Level any audio file to a standard loudness (LUFS) right in your browser — -14 for Spotify/YouTube, -16 for podcasts. Runs locally, nothing is uploaded, free.
Shorten Long Audio Pauses
Tighten speech pacing by shortening long silent gaps to a natural pause length in your browser. Nothing is uploaded, free.
Change Audio Pitch
Free online pitch changer — shift any audio up or down by semitones without changing its speed. Transpose songs, fix tuning, deepen voices in your browser.
Resample an Audio File
Change any audio file's sample rate — 8 kHz voice to 192 kHz studio — with high-quality ffmpeg resampling, right in your browser. Runs locally, nothing is uploaded, free.
Reverse Audio
Play any audio clip backwards in your browser — or join the original and its reversal for a reverse-cymbal riser. Nothing is uploaded.
Make a Phone Ringtone from a Song
Make a phone ringtone from any song in your browser — pick a start and end (up to 40 s), boost loudness, add fades, save as iPhone m4r or Android mp3.
Audio RMS level report
Measure per-channel RMS, sample peak, average level, headroom, DC offset, and clipped samples from pasted audio bytes as JSON, CSV, or a text report.
Remove Silence from Audio
Strip dead air and long pauses out of any recording right in your browser — set a silence threshold and minimum gap. Runs locally, nothing is uploaded, free.
Change Audio Speed (Keep Pitch)
Free online audio speed & tempo changer — speed up or slow down any track without changing the pitch. Set a factor, BPM ratio, or percentage in your browser.
Convert Audio to Mono
Downmix any stereo or surround audio file to mono right in your browser — blend all channels or keep just the left/right side. Nothing is uploaded, free.
Change Audio Volume
Boost or cut any audio file's volume right in your browser — by decibels or a factor, with a clipping-safe peak limiter. Nothing is uploaded, free.
Audio Waveform Video Generator
Turn audio into an animated waveform MP4 in your browser. Pick mirror, bars or wave styles, colors, gradient, size and fps. Nothing uploaded.
Base64 to Audio File
Decode a Base64 string or data: URI back into an audio file in your browser. Auto-detects WAV, MP3, Ogg, FLAC, M4A, AAC, WebM, AIFF and MIDI.
Bitcrush an Audio File
Crush audio into lo-fi, retro and 8-bit textures by reducing bit depth, lowering the effective sample rate and blending the result in your browser.
Add Chorus to Audio
Add a configurable chorus effect to an audio file in your browser with ffmpeg: voices, delay, depth, rate, decay, and output format controls.
Detect Clipping in WAV Audio
Paste base64 or hex WAV bytes and detect clipped full-scale samples, consecutive clipping runs, timestamps, and worst distorted regions. Runs locally in your browser.
Remove Harsh Sibilance from Vocals
Free browser de-esser: duck harsh s, sh and t sibilance on vocals, narration and podcasts. Tune amount, band and reduction, or audition the removed esses.
Extract Audio from a Video
Pull the audio track out of any video as MP3 or WAV, right in your browser — pick a format and bitrate. Runs locally with ffmpeg, nothing is uploaded, free.
FFT Analyzer
Paste samples and get the frequency spectrum: magnitude, phase, dominant peaks, bin resolution and Nyquist, with windowing, dB scaling, CSV and JSON.
Guitar Tab to MIDI
Paste ASCII guitar or bass tablature and download a real Standard MIDI File — tuning presets, capo, transpose, tempo, note length and GM instrument.
Extract MFCC Features from Audio
Extract MFCC features from audio as CSV, TSV, or JSON. Tune speech defaults, librosa-style settings, deltas, and sample-rate options locally.
MIDI note extractor
Extract every note from a .mid file as a CSV or TSV table: pitch, start, duration and velocity, in seconds, ticks or beats. Free, runs in your browser.
MIDI tempo changer
Change the tempo of a MIDI file without moving a single note. Set an exact BPM or scale the speed, keep or flatten tempo changes. Runs in your browser.
MIDI to JSON
Convert a Standard MIDI File (.mid/.midi) to JSON — paired notes with pitch names, a raw event stream, or a compact summary. Free, runs in your browser.
MIDI track splitter
Split a multi-track MIDI file into separate single-track .mid files, one per track or per channel. Tempo and time signature are copied into every part.
Extract M4A Audio from MP4
Extract an MP4's audio track to M4A in your browser. Lossless stream-copy remux — no re-encode, no quality loss, nothing uploaded.
Parametric Equalizer
Free parametric equalizer in your browser — set the exact frequency, gain and Q of three bands, then save as MP3, WAV, OGG, FLAC or M4A. Nothing uploaded.
Peak Detector
Paste a 1-D signal and find its peaks and valleys, with prominence, height, distance and width filters. Free, runs in your browser.
Spectral EQ Match
Paste your track's band levels plus a reference or target curve to derive corrective EQ gains, a ready-to-paste ffmpeg filter chain and the loudness offset in dB.
Speech audio quality checker
Paste a short WAV clip as base64 or hex and check ASR readiness: sample rate, channels, SNR estimate, clipping, level, and verdict.
SPHERE (.sph) to WAV Converter
Convert a NIST SPHERE (.sph) speech-corpus file to a standard WAV in your browser. Parses the ASCII header, fixes big-endian byte order, expands mu-law and A-law.
Tempo Map Extractor
Turn a list of beat times into a tempo map: BPM versus time, with smoothing, drift statistics and CSV, JSON, label-track or MIDI tempo exports.
Trim an Audio File
Trim any audio file in your browser — keep or remove a start–end range, add edge fades, save as MP3, WAV, FLAC or M4A. Runs locally, nothing is uploaded.
Add a Silent Audio Track to a Video
Give an audio-less video a silent audio track so uploaders and editors that require an audio stream accept it. The picture is copied untouched, in your browser.
Set a Video's Audio Bitrate
Re-encode just a video's audio at your chosen bitrate to shrink an oversized soundtrack while the picture is stream-copied untouched. Runs in-browser; nothing uploaded.
Compress a video's audio dynamics
Even out a video's quiet and loud passages in your browser with ffmpeg dynamic-range compression. The picture is copied untouched.
Remove Background Noise from a Video
Clean up hiss, hum and background noise in a video's audio right in your browser — pick a strength and denoiser. The picture is untouched. Nothing is uploaded, free.
Fade Video Audio In or Out
Add fade-in and fade-out ramps to a video's audio while copying the picture untouched. Free, private, and runs in your browser.
Change a Video's Audio Volume
Make a video louder or quieter right in your browser — by decibels or a factor, with a clipping-safe limiter. The picture is untouched. Nothing is uploaded, free.
Remove Mains Hum from a Video
Kill 50/60 Hz electrical hum and harmonics in a video's audio with tuned notch filters. The picture is untouched and nothing is uploaded.
Video audio RMS timeline
Extract windowed RMS and peak audio levels from a video's audio track into a CSV or JSON time series. Set the window, hop, and dBFS/linear unit.
Fix Video Audio Sync
Shift a video's audio earlier or later to fix lip-sync in your browser. Positive delays, negative advances; the picture is untouched. Nothing is uploaded.
Keep One Audio Track in a Video
Pick which audio track to keep in a multi-language video and drop the rest — lossless, no re-encode. Runs in your browser, nothing is uploaded, free.
Extract a Video's Audio Track (Lossless)
Demux a video's audio track in your browser with no re-encode — lossless stream-copy into MKA, M4A or OGG. Pick the track, keep the original codec, nothing uploaded.
Convert a Voice Note
Convert WhatsApp, Telegram, Signal and other Opus/Ogg voice notes to MP3 or WAV, or encode audio back to Opus voice notes in your browser.
WAV Samples to JSON
Paste an uncompressed WAV as base64 or hex and get JSON: the sample rate, channels, bit depth and duration alongside the PCM samples as an array. Runs in your browser.
WAV to CSV Samples
Paste an uncompressed WAV as base64 or hex and export its decoded PCM samples to CSV: one column per channel, with a time or sample index. Runs in your browser.
WAV to Raw PCM Extractor
Paste an uncompressed WAV as base64 or hex and get just its raw interleaved PCM bytes — header stripped — as base64, hex, or a C array.
Waveform Image from Audio
Turn any audio file into a waveform PNG in your browser — pick the size, solid or gradient wave colors and background, or keep it transparent. Nothing is uploaded.