MP3 bitrate converter online
Convert a decoded audio file to MP3 at 64, 96, 128, 192, 256, or 320 kbps. Processing and encoding run in this browser tab.
A higher bitrate cannot restore details already removed from a compressed source. MP3 and WAV are tested inputs; other formats depend on the browser decoder.
How this bitrate converter works
- 1
Open an MP3 or WAV and check its duration, sample rate, and channels.
- 2
Choose the output bitrate and review the size estimate.
- 3
Convert locally, then download the generated MP3.
What bitrate changes — and what it does not
- Bitrate controls how much compressed data is used per second.
- Lower values usually create smaller files with more compression.
- Raising bitrate during re-encoding does not recreate information lost earlier.
- The current MP3 encoder writes stereo output, including when the decoded source is mono.
- The estimate excludes encoder padding and metadata, so the final size can differ slightly.
Audio stays in the tab during conversion
The selected file is decoded in browser memory and sent to the local MP3 encoder. The application does not upload the audio to its server to perform this conversion. The page can still load site resources and consented analytics.