About this tool
An audio converter re-encodes a sound file from one format to another. Drop in an MP3, WAV, M4A or other file and export it as a lossless WAV or a compact MP3 at the bitrate you choose, optionally forcing the output to mono or stereo.
The file is decoded to raw PCM with your browser's native Web Audio engine and re-encoded on your device — your audio never leaves your device and nothing is uploaded to any server. That keeps voice notes, interviews and music private no matter their size.
Use it to shrink a bulky WAV into an MP3 for sharing, turn an MP3 into an editable WAV, downmix a stereo file to mono to save space, or standardize a batch of clips to one format.
Frequently asked questions
Which formats are supported?
Input can be any format your browser decodes — MP3, WAV and AAC/M4A broadly, FLAC on Chromium and OGG on some browsers. Output is WAV (16-bit PCM) or MP3 at 128–320 kbps.
Is the conversion lossless?
WAV output is lossless PCM, but converting a compressed source (like MP3) to WAV cannot restore detail that was already discarded. MP3 output is a lossy re-encode; higher bitrates preserve more quality at a larger file size.
Does the sample rate change?
No. The output keeps the decoded sample rate (shown after loading). MP3 requires a standard rate, so on the rare file with an unusual rate the audio is resampled to 44.1 kHz.
Is my file uploaded anywhere?
No — decoding and encoding happen entirely in your browser, so your audio stays on your device and is never sent to a server.