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Audio Bitrate Converter

Re-encode audio at a new bitrate, sample rate or format — with an honest warning.

Converters Reviews Free · no sign-up

Drop an audio file here, or click to choose one

Converted on your device — the file is never uploaded

Result

Quick Tool Overview

The Audio Bitrate Converter re-encodes audio at a new bitrate, sample rate, channel count or format, with presets for quality, size and speech — and a warning when a higher bitrate would achieve nothing.

What it does
Changes an audio file’s bitrate or format
You give it
Any common audio file
You get back
The same audio, re-encoded
Best for
Making a podcast or voice note small enough
Converters Free, unlimited use No sign-up Runs in your browser

About the Audio Bitrate Converter

Bitrate is the dial between quality and size, and it is the one people reach for when a podcast episode is too big to upload, a voice note has to fit an email, or a track needs to match the rest of a library. The catch is that raising it does nothing at all — the quality lost in the first encode never comes back.

The conversion runs in your browser through ffmpeg.wasm — the real ffmpeg, compiled to WebAssembly. Nothing is uploaded: a wedding video, a client recording or an unreleased track never leaves your machine. The engine is a one-off download of about 32 MB, after which your browser caches it and every later conversion starts immediately.

Choose the output format — MP3, M4A, OGG, Opus, WAV or FLAC — and a preset: quality, smallest sensible size, or speech, which drops to 64 kb/s mono at 22 kHz and turns an hour of talking into about 28 MB. The file is examined first, so if you ask for a higher bitrate than the source actually holds, the page tells you rather than quietly making a bigger file that sounds no better.

Key features of the Audio Bitrate Converter

Three presets

Quality, smallest sensible size, and a speech preset at 64 kb/s mono.

Six formats

MP3, M4A, OGG, Opus, WAV and FLAC.

Reads the source first

So it can warn you when you are asking for more than the file holds.

Sample rate and channels

The other two dials that change the size.

Nothing is uploaded

ffmpeg runs inside the browser tab, so the file never leaves your computer.

How to use the Audio Bitrate Converter

  1. 1

    Drop the audio in

    MP3, M4A, WAV, OGG, Opus, FLAC or WMA.

  2. 2

    Choose format and preset

    Quality, size, or the speech preset.

  3. 3

    Fine-tune if you want

    Bitrate, sample rate, channels, trimming.

  4. 4

    Re-encode and download

    With the real numbers shown.

Frequently asked questions

No. Encoding a 128 kb/s file at 320 makes it bigger and no better — the detail was discarded by the first encoder. The page warns you when you try.

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