Audio Bitrate Changer Online
Re-encode any audio file to MP3 at the bitrate you want — 64, 128, 192, 256, or 320 kbps. Shrink oversized files or bump up quality, all in your browser.
Change MP3 Bitrate in 3 Steps
No account. No upload. Just drop your file, pick a preset, and download.
Upload the Audio
Drag and drop an audio file onto the tool or click to browse. Files up to 200 MB.
Pick a Bitrate
Tap 64, 128, 192, 256, or 320 kbps. The estimated output size is calculated live so you know what to expect.
Download the MP3
Click Change Bitrate & Download. The file is re-encoded in your browser and saved straight to your device.
Why Notevibes Audio Bitrate Changer
Five presets, one button, honest about what re-encoding can and cannot do.
5 Bitrate Presets
Pick from 64, 128, 192, 256, or 320 kbps with a single tap. No sliders, no fiddling — the standard MP3 bitrates everyone actually uses.
Instant Processing
Most files re-encode in seconds. The browser handles decoding and MP3 encoding locally — no wait, no queue, no round-trip to a server.
Privacy First
Your file is processed in your browser. Nothing is uploaded to a server, nothing is stored, nothing is tracked.
Any Audio Format
Drop MP3, WAV, M4A, FLAC, OGG, AAC, WebM, or Opus. Anything your browser can decode will load into the bitrate changer.
MP3 Output
The result is a clean MP3 at the exact bitrate you picked, saved directly to your device. The filename includes the bitrate so you never lose track.
Works on Mobile
Change bitrate on your phone or tablet. Runs on iOS, Android, Chrome, Firefox, Safari, and Edge with no app install.
Heads up: re-encoding is lossy and upscaling does not help
MP3 is a lossy format, so every re-encode drops a little quality — that is just how the format works. Going from a lossless source (WAV, FLAC) to MP3 is the normal use case and sounds fine. Going from MP3 to a lower bitrate MP3 will audibly lose detail, so only do it when you need a smaller file. And importantly: bumping a 128 kbps source up to 320 kbps does NOT recover lost quality. The original data is the ceiling — you will end up with a bigger file, not a better one.
Your File Stays on Your Device
Every file is decoded and re-encoded locally in your browser. Nothing is uploaded, stored, or analyzed.
No Upload
File never leaves your device
No Account
Start changing bitrate immediately
No Tracking
We never see your file
What You Can Do With a Bitrate Changer
Five presets cover the real-world reasons you would re-encode an MP3.
Shrink oversized MP3s
Drop a 320 kbps music file to 192 kbps and cut the size roughly in half without obvious quality loss
Tiny voice files at 64 kbps
Re-encode podcasts, dictations, or audiobook chapters at 64 kbps for the smallest possible voice files
Boost quality for listening
Re-encode lossless WAV or FLAC sources to 256 or 320 kbps MP3s for your phone or car stereo
Match upload size limits
Hit strict size limits on forums, email attachments, or voice-note services by dropping to a lower bitrate
Standardize your library
Re-encode a mixed music library to a single bitrate so every file in your collection sounds consistent
Share smaller versions
Send a friend a 128 kbps preview before delivering the full-quality master — faster to upload, faster to download
Need More Than Bitrate Changes?
The full Notevibes Online Audio Editor lets you trim clips, mix multiple tracks, add fades, remove vocals, clean up podcasts, and export to MP3 or WAV — all in your browser.
Open Full Audio EditorRelated Audio Tools
More free browser audio tools from Notevibes — no sign-up, no upload.
Frequently Asked Questions
How do I change MP3 bitrate?
Drop your audio file onto the tool, pick one of the five presets (64, 128, 192, 256, or 320 kbps), and click Change Bitrate & Download. The file is re-encoded in your browser as an MP3 at the bitrate you picked and saved straight to your device. Nothing is uploaded.
Can I increase bitrate above the source?
Technically yes, but it does not add quality. If your source is a 128 kbps MP3 and you re-encode at 320 kbps, you will get a larger file — but the original data is the ceiling. The information that was thrown away at 128 kbps is gone for good, and re-encoding at a higher number cannot bring it back. Upscaling only makes sense when you need a specific file to match an upload requirement or a player quirk.
Does re-encoding cause quality loss?
Yes. MP3 is a lossy format, so every re-encode introduces some quality loss. For lossless sources (WAV, FLAC) going to MP3 this is expected and usually acceptable — that is what MP3 is for. For MP3 → MP3 at a lower bitrate you will lose audible detail (especially in the high frequencies), so only go down when you actually need the smaller file. For MP3 → MP3 at the same or higher bitrate, the loss is usually small but it is not zero.
What bitrate should I pick?
64 kbps is fine for voice-only content like spoken word, audiobooks, or dictations where size matters more than fidelity. 128 kbps is a small, decent compromise for casual music. 192 kbps is the common standard for music and strikes a good balance. 256 kbps is high quality, close to transparent for most listeners. 320 kbps is the maximum MP3 bitrate — pick it when quality matters more than file size.
Is the audio bitrate changer free?
Yes. Completely free, with no sign-up, no watermark, no ads, and no limits on how many files you can process. Max file size is 200 MB per upload.
Is my file uploaded to a server?
No. The audio bitrate changer runs entirely in your browser using the Web Audio API and an in-browser MP3 encoder. Your file never leaves your device — nothing is uploaded, stored, or analyzed.
What audio formats are supported?
You can drop MP3, WAV, M4A, FLAC, OGG, AAC, WebM, and Opus files. Anything your browser can decode will load. The output is always an MP3 at the bitrate you picked — that is what a bitrate changer is for.
Does it work on mobile?
Yes. It works on iOS and Android in Chrome, Firefox, Safari, and Edge. Tap to upload, tap a bitrate preset, tap Change Bitrate & Download — that is all it takes.