Change an audio file's bitrate online
Pick an exact bitrate (64 to 320 kbps) and re-encode your audio as MP3 directly in your browser, instead of relying on a generic automatic quality setting.
or click to select it
Unlike a generic compressor that only offers 'smaller' or 'bigger', this tool lets you set the exact kbps number: useful when you need to meet a specific platform requirement or just want direct control over the size/quality tradeoff.
Use cases
- Meet a maximum-bitrate requirement from a podcasting platform.
- Match the bitrate of several files before merging or comparing them.
- Manually choose the exact size/quality tradeoff for your use case.
How it works
- 1
Upload your audio
Supports MP3, WAV, M4A, FLAC, AAC, OGG and OPUS.
- 2
Select the bitrate
Choose the exact kbps value you need.
- 3
Download the MP3
Re-encoded at the chosen bitrate.
Technical details
Uses ffmpeg.wasm with libmp3lame in constant-bitrate (CBR) mode when you set a specific value, instead of the automatic VBR this site's other tools default to.
Frequently asked questions
Which bitrate should I choose?
128 kbps is a good balance for most uses; 192-256 kbps for music where quality matters more; 64-96 kbps for voice or podcasts.
Can I raise the bitrate to improve quality?
No — if the source is already compressed at a lower bitrate, raising it doesn't add real quality, it just increases the file size.