Audio Converter
Convert audio and video files to MP3, WAV, M4A or FLAC. Everything runs on your device; nothing is uploaded.
How to convert an audio file
Three steps, all in your browser.
1. Choose your files
Drop one or more audio or video files, up to 2 GB each and up to 20 at a time. They are read on your device.
2. Pick the output
MP3 at 192 kbps is chosen for you. Switch to WAV or FLAC for editing, or M4A for iPhones.
3. Convert and download
Press Convert. Each file keeps its name with the new extension, and its title and artist tags.
What it converts
Files you can convert
Audio: MP3, WAV, M4A, AAC, FLAC, OGG, Opus, AIFF and others. Video: MP4, MOV, M4V, WEBM, MKV and 3GP, whose sound track is kept and picture dropped.
Formats you get
MP3 at 128, 192 or 320 kbps; WAV (16-bit PCM); M4A (AAC at 256 kbps); FLAC (lossless). WAV and FLAC files can be up to 30 minutes long.
Which format to choose
MP3 when the file has to play everywhere or be small. WAV for music programs, video editors and samplers. FLAC to keep every detail at about half the size of WAV. M4A for iPhones and iTunes.
What people convert audio for
A file that won't play
A voice message, a game sound or a download in a format your phone, car or program can't open becomes an MP3 that plays everywhere.
Files for editing
Music programs, video editors and transcription tools often want WAV. Convert once and import without errors.
Smaller files
WAV and FLAC recordings shrink to a fraction of their size as MP3, small enough to send or keep on a phone.
Find the song in a recording
After converting, press Identify this song: the audio opens in the AHA Music song finder without choosing the file again.
Audio converter: frequently asked questions
How the converter works and what it can do.
How do I convert an audio file?
Choose one or more files above, pick MP3, WAV, M4A or FLAC, press Convert and download the result. The conversion runs in your browser, with no upload and no queue.
Which formats are supported?
Most audio and video files your browser can open: MP3, WAV, M4A, AAC, FLAC, OGG, Opus, AIFF, MP4, MOV, WEBM, MKV and more. The result is MP3, WAV, M4A or FLAC.
Are my files uploaded?
No. The conversion runs inside your browser with a WebAssembly build of FFmpeg. Only the audio engine (about 31 MB) is downloaded, once; your files never leave your device.
Does converting lower the quality?
Converting to WAV or FLAC keeps the sound exactly as it is in the source. Converting to MP3 or M4A compresses it; at 192 kbps or more the difference is very hard to hear. No conversion can add quality the source doesn't have.
Can I convert several files at once?
Yes. Add up to 20 files, each up to 2 GB; they are converted one after another with the same settings, and each gets its own download button.
Is there a length limit?
MP3 and M4A have no length limit. WAV and FLAC files can be up to 30 minutes long, because the result is held in your browser's memory.
Are tags kept?
Yes. Tags such as title, artist and album are copied to the new file. Cover pictures are not copied.
Is there a converter for my exact formats?
Yes, the pages listed below each open with the right output chosen and explain the formats involved, for example M4A to MP3, WAV to MP3, OGG to MP3 or MP4 to WAV. They all use this same converter.
Converters for each format
MP4 to MP3 Converter
Extract the audio from videos and save it as MP3, WAV, M4A or FLAC, several files at once.
Video to MP3 Converter
Extract the audio from MOV, MP4, WEBM or MKV videos as MP3, WAV, M4A or FLAC.
M4A to MP3 Converter
Turn M4A files and iPhone voice memos into MP3 that plays everywhere.
WAV to MP3 Converter
Shrink WAV recordings and mixes to MP3 at 128, 192 or 320 kbps.
MP3 to WAV Converter
Turn MP3 into uncompressed WAV for editors, DJ software and samplers.
OGG to MP3 Converter
Turn OGG and Opus files, including WhatsApp and Telegram voice messages, into MP3.
MP4 to WAV Converter
Take the sound of MP4, MOV or WEBM videos as uncompressed WAV for editing.
M4A to WAV Converter
Turn M4A files and iPhone voice memos into WAV for editors and transcription.
FLAC to MP3 Converter
Make FLAC albums small enough for phones, cars and players, tags included.
Audio Extractor
Extract the audio from any video on your device as MP3, WAV, M4A or FLAC.
MOV to MP3 Converter
Turn iPhone and camera MOV videos into MP3 audio.
OGG to WAV Converter
Turn OGG and Opus files into WAV that every editor and sampler opens.
FLAC to WAV Converter
Turn FLAC into uncompressed WAV for DJ software, editors and CDs.
MP4 to M4A Converter
Save the sound of a video as M4A for iPhone, iTunes and Apple Music.
MP3 Cutter & Audio Trimmer
Cut a part of an audio or video file on the waveform and save it as MP3 or WAV, with an optional fade.
BPM & Key Finder
Tempo, key, mood, energy, loudness and danceability, computed on your device.
Identify a song in a file
Audio or video files up to 2 GB; Full Scan lists each song it recognises with its position.