Audio Converter
Convert MP3, WAV, OGG, M4A, AAC and FLAC files to another format directly in your browser. Process multiple files in one session and control quality when the output format supports it.
Bitrate applies to lossy outputs. WAV and FLAC are lossless outputs and do not use the bitrate setting.
Convert audio between common formats
Use Audio Converter when the goal is to change the file format rather than simply make it smaller. Convert WAV to MP3 for sharing, M4A to MP3 for compatibility, or create FLAC for lossless storage.
Supported audio formats
MP3
MP3 is a broadly compatible lossy format for everyday sharing, playback and uploads.
WAV
WAV commonly stores uncompressed PCM and is useful for editing and production workflows.
FLAC
FLAC is lossless and preserves the source audio data while usually using less space than uncompressed WAV.
OGG, M4A and AAC
OGG Vorbis and AAC can provide efficient lossy encoding. M4A is a common container for AAC audio.
Batch audio conversion
When you have several recordings, select multiple files at once. NeroTool processes them sequentially in the browser and gives each result its own download.
Bitrate, sample rate and channels
For lossy output, a higher bitrate normally means a larger file and more preserved detail. Sample rate controls the number of audio samples per second, while mono and stereo control the number of audio channels. If you do not have a specific delivery requirement, the balanced preset is a practical starting point.
Conversion is different from compression
A format change does not automatically reduce file size. If the main goal is to make a file smaller, use Audio Compressor, which is designed around compression levels and target file sizes.
Privacy and local processing
Supported audio conversion is performed locally in your browser with FFmpeg.wasm. Your selected files are not intentionally uploaded to a NeroTool processing server.
Convert audio for compatibility
Audio conversion is useful when a player, editor, device or publishing service expects a particular format. MP3 is broadly compatible, WAV is useful when uncompressed audio is needed, while OGG, M4A, AAC and FLAC serve different playback and quality requirements.
Match quality to the final use
For voice and casual listening, a moderate bitrate can keep files manageable. Higher bitrates are more appropriate when preserving detail matters. Remember that converting a lossy file to another lossy format cannot restore quality that was already removed.
For smaller audio files, use Audio Compressor. To extract sound from a video, open Video to MP3.
Frequently asked questions
Can I convert multiple audio files?
Yes. Select multiple files or drop several files into the upload area. They are processed one after another.
Which format should I choose for sharing?
MP3 is usually the safest choice for broad compatibility. M4A/AAC is another efficient modern option.
Does converting audio always make it smaller?
No. Conversion changes format or codec. Use Audio Compressor when reducing file size is the primary goal.
Is my audio uploaded?
No. Supported conversion runs locally in your browser with FFmpeg.wasm.