Audio converter
Get audio files that a device won't play, an app won't accept, or that take up too much space into the right format. Convert up to 10 files at a time, all in your browser.
Free · no sign-up · your file is processed in your browser and never sent to a server
No file handy? Try it with a 20-second Turkish meeting recording.
How to use
- Choose your filesDrop one or more audio files. You can add videos such as MP4 and MOV too; only their audio tracks are converted.
- Pick the target format and qualityChoose MP3, WAV, M4A, OGG or FLAC, and set the bitrate for lossy formats. For voice recordings, the mono option makes files smaller.
- Convert and downloadFiles are processed one after another; each gets its own download link as soon as it's ready.
Formats at a glance
| Format | Type | 1 minute stereo (approx.) | Strength |
|---|---|---|---|
| MP3 | Lossy | 128 kbps: ~1 MB · 320 kbps: ~2.4 MB | Plays on every device and app |
| M4A (AAC) | Lossy | 128 kbps: ~1 MB | Usually cleaner than MP3 at the same bitrate |
| OGG (Opus) | Lossy | 96 kbps: ~0.7 MB | Speech stays clear even at low bitrates |
| FLAC | Lossless | Varies by recording, smaller than WAV | Archiving; quality kept exactly |
| WAV | Uncompressed | 44.1 kHz / 16-bit: ~10 MB | Audio and video editing software |
Sizes are calculated from the bitrate (bitrate × duration); real files may differ by a few kilobytes of metadata.
Popular conversions
WAV → MP3
Shrink large recordings to a shareable size.
M4A → MP3
Open iPhone recordings on any device.
MP4 → MP3
Save a video's audio as MP3.
OGG → MP3
Bring OGG files to a common format.
FLAC → MP3
Portable copies from a lossless archive.
MP3 → WAV
Uncompressed files for editing software.
M4A → WAV
Get Apple recordings ready for editing.
OPUS → MP3
Make voice message files playable.
AAC → MP3
Convert raw AAC recordings to MP3.
WEBM → MP3
Get the audio of browser and screen recordings.
What to know about quality
- Converting a lossy file (MP3, M4A, OGG) to a lossless format (WAV, FLAC) doesn't bring back lost detail; it only prevents further loss in later edits.
- When converting lossy to lossy (like M4A → MP3), don't set the target bitrate lower than the source.
- When source and target use the same codec (for example AAC in an MP4 → M4A), the tool copies the audio without re-encoding: fast and lossless.
Privacy: your files never leave your device
Everything happens in your browser. Your file is not sent to Voiser's servers or stored anywhere, and it's cleared from memory when you close the tab. That's also why the tool stays fast on a slow connection.
Common questions
Is the audio converter free?
Yes, it's free and needs no account. Conversion runs in your browser, so there's no file count or daily limit; you can add up to 10 files at a time.
Which formats can it read?
MP3, WAV, M4A, AAC, OGG, OPUS, FLAC, WEBM, AIFF, and the audio tracks of videos such as MP4, MOV and MKV. With rare codecs your browser's decoder may not be enough; the tool will tell you.
Why is the OGG option disabled?
OGG output uses your browser's Opus encoder. Some browsers don't provide it; try a current version of Chrome, Edge or Firefox, or choose another format.
Can I convert large files?
Yes, up to 2 GB per file. The file is read without being loaded into memory all at once; the time it takes depends on your device.
Are tags (title, cover art) kept?
No. The output is written clean; metadata such as title, artist and cover art isn't carried over.
Related tools
- Convert WAV to MP3Turn large WAV recordings into shareable MP3 files.
- Convert M4A to MP3Turn iPhone and other M4A recordings into MP3s that play anywhere.
- Extract audio from videoSave the audio track of your own videos as MP3, M4A or WAV.
- MP3 cutter and audio trimmerSelect any part of an audio file on the waveform and cut it out.
- Audio joinerMerge several audio files into one, in the order you choose.
Your file is ready. Now for the content.
Turn text into natural speech with Text to Speech, and recordings into text with Transcription. Start with a free account.