About the Format Converter
SoundBench Audio Converter changes audio files between MP3, FLAC, WAV, ALAC, AAC (M4A), OGG Vorbis, Opus and AIFF. Add as many files as you like, choose the output format and quality, and each converted file downloads as soon as it is ready.
Title, artist, album and cover art are copied to the new file. You can also change the sample rate or convert stereo to mono during conversion.
How to use the Format Converter
- Drop one or more audio files onto the page, or click to choose them.
- Pick the output format and quality. MP3 320 kbps and FLAC are good defaults for music.
- Optionally change the sample rate or channel count.
- Click Convert. Each file downloads when it finishes.
Which format should I choose?
| Format | Type | Best for |
|---|---|---|
| MP3 | Lossy | Playing anywhere: every phone, car and player supports it |
| AAC (M4A) | Lossy | Apple devices; sounds better than MP3 at the same bitrate |
| Opus | Lossy | Smallest files for voice and podcasts |
| OGG Vorbis | Lossy | Games and open-source players |
| FLAC | Lossless | Archiving music at full quality in about 60% of WAV size |
| ALAC | Lossless | Lossless music in Apple Music and iTunes |
| WAV / AIFF | Uncompressed | Editing in audio software and DAWs |
Lossy and lossless conversion
Converting from a lossless format (FLAC, WAV, ALAC) to a lossy one (MP3, AAC) makes the file much smaller. Converting the other way, for example MP3 to FLAC, makes the file bigger but cannot restore detail the MP3 encoder removed. Lossless to lossless conversions, such as FLAC to ALAC, are bit-perfect.
Frequently asked questions
Is there a file size limit?
No fixed limit. Files are processed in your browser, so the practical limit is your device's memory. Albums of several hundred megabytes work on a typical computer.
Will converting keep my tags and album art?
Yes. Title, artist, album, track number and cover art are copied to the output when the target format supports them. You can turn this off with the Keep tags option.
Can I convert several files at once?
Yes. Drop a whole folder's worth of files and they are converted one after another with the same settings.
Does converting MP3 to FLAC improve quality?
No. The file becomes lossless from that point on, but the detail removed when the MP3 was made is gone. Use the Fake Lossless Checker to see this in a spectrogram.
Related tools
FLAC to MP3 Converter
Shrink lossless FLAC to MP3 for any player.
WAV to MP3 Converter
Make large WAV recordings small and shareable.
M4A to MP3 Converter
Convert iPhone recordings and iTunes files to MP3.
WAV to FLAC Converter
Save space on WAV files with zero quality loss.
FLAC to ALAC Converter
Lossless FLAC to Apple Lossless for iPhone and Mac.
Reduce File Size
Shrink audio for email, chat or uploads.