Online Audio Converter
Turn any audio file, or the sound of a video, into the format you need: 11 output formats, quality, sample rate, mono or stereo, fades and tags. Convert several files at once, without uploading anything.
- 11 output formats
- Batch conversion
- Tags and fades
- 100% private
100% private — Everything is processed directly in your browser: your files, voice, and image are never sent to Chatzam's servers.
How do you convert an audio file?
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Add your files
Drag in one or more audio or video files: MP3, WAV, M4A, FLAC, OGG, Opus, WMA, AMR, MP4, MOV…
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Choose the format
Tap the format and quality you want. Open the advanced settings for sample rate, mono, fades or tags.
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Convert and download
Start the conversion, listen to the result and download each file, or the whole batch as a ZIP.
Every audio format, one tool
11 output formats
MP3, WAV, M4A, FLAC, OGG, Opus, AAC, AIFF, M4R (iPhone ringtone), MP2 and WMA, from almost any audio or video file.
Quality your way
Constant bitrate from 32 to 384 kbps or variable bitrate, 16-, 24- or 32-bit depth for lossless formats, sample rate from 8 to 192 kHz, mono or stereo.
Fades, reverse, tags
Add a fade-in or fade-out, reverse the sound, and fill in the title, artist, album, year and genre.
Batch, no upload
Convert a whole folder in one go, with the estimated size of each file. Everything happens in your browser.
Which audio format should you choose?
For a file that plays everywhere (car stereo, TV, old MP3 player), MP3 is still the safest choice. M4A (AAC) sounds better at the same size and is ideal for Apple devices. To keep perfect quality, choose a lossless format: WAV (or AIFF on a Mac) for editing, FLAC for archiving your music in a file almost half the size. Opus, produced here in mono, is unbeatable for speech at a low bitrate, OGG is popular for video games and Android, and M4R is used to make an iPhone ringtone.
Input formats and output formats
As input, the converter reads MP3, WAV, M4A, AAC, FLAC, OGG, Opus, WMA, AIFF, AMR, AC3, APE, CAF and MP2 files, plus the sound of MP4, MOV, MKV, AVI, WEBM, 3GP or FLV videos. As output, it produces MP3, WAV, M4A, FLAC, OGG, Opus (in mono, because the browser can't encode it in stereo), AAC, AIFF, M4R, MP2 and WMA. AMR, the format of old phones and some voice recorders, can be read but not produced: its encoder isn't available in the browser. If you just need MP3, the Convert Audio to MP3 tool gets straight to the point.
Bitrate, sample rate and bit depth: the right settings
Bitrate (kbps) sets the quality and size of lossy formats: 128 kbps for speech, 192 to 256 kbps for music, 320 kbps at most for MP3. Variable bitrate (VBR) gives more bits to complex passages and fewer to silence: better quality at the same size. Sample rate (44.1 kHz for CD, 48 kHz for video) and bit depth (16-bit for CD, 24-bit in the studio) mostly matter for lossless formats. Keep "Original" if you have no specific requirement: raising the sample rate or bit depth never makes a sound better.
Fades, mono and tags: finishing a file properly
A fade-in or fade-out of a few seconds avoids an abrupt start or ending, which is handy for a ringtone or a clip. Mono halves the file size for a voice recorded on a single microphone. Tags (title, artist, album, year, genre, comment) show up in music players and libraries; leave the fields empty to keep the original ones. To make a file as small as possible, use Compress Audio.
Frequently Asked Questions
How do I convert an audio file to another format?
Drop in the file, tap the format you want (MP3, WAV, M4A, FLAC…), choose the quality and start the conversion. You can listen to and download the converted file right away.
How do I extract the sound from a video?
Drop the video (MP4, MOV, MKV, AVI…) in just like an audio file: only the soundtrack is kept and converted to the format you choose.
What's the difference between WAV, FLAC and MP3?
WAV is uncompressed: perfect quality, large file. FLAC is compressed without loss: same quality, about 40% smaller. MP3 is lossy: much smaller, with a difference that's rarely audible at 192 kbps or more.
Can I convert several files at once?
Yes. Add as many files as you need: they're converted one after another with the same settings, then you can download them one by one or together as a ZIP.
Can I convert to AMR?
No: AMR can be read as input, but its encoder doesn't exist in the browser. For a lightweight voice memo, choose Opus or M4A in mono instead.
Are my files uploaded to a server?
No. The conversion uses FFmpeg right in your browser: your files never leave your device. Free, no sign-up and no watermark.