Convert audio to MP3, WAV, OGG, or WebM online for free. Convert M4A, FLAC, OGG, and WebM files with adjustable MP3 bitrate. Runs in your browser — no uploads, no signup.
First time here? Upload or drag an audio file into the tool Your input is processed locally and disappears when you close the tab.
Voice memos arrive as M4A, browser recordings as WebM, and audio editors often insist on uncompressed WAV — meanwhile the format almost everything actually accepts is MP3. Our free audio converter online reads any format your browser can decode and re-encodes it to MP3, WAV, OGG, or WebM, entirely on your device.
Use it as an m4a to mp3 converter for iPhone voice memos, a wav to mp3 online tool when a recording is too large to email, or an audio to wav converter when a DAW or sampler rejects compressed input. MP3 output has an adjustable bitrate from 96 to 320 kbps, so you can trade size against quality deliberately: 128 kbps is ample for speech, 192 kbps is the sweet spot for music, and 320 kbps keeps as much detail as MP3 can carry. WAV output is bit-exact, adding no further loss to what the decoder produced.
Decoding uses the Web Audio API and MP3 encoding runs through a pure-JavaScript encoder in the page, so nothing is uploaded and the converter keeps working offline once loaded — which also makes it safe for confidential recordings. It pairs naturally with the rest of our audio suite: capture takes with the Voice Recorder, rip soundtracks with the Video Audio Extractor, and cut the result down to size with the Audio Trimmer.
Upload or drag an audio file into the tool
Choose MP3, WAV, OGG, or WebM as the output
Set the bitrate if you picked MP3
Click Convert
Download the converted file
Drop an audio file or click to upload
MP3, OGG, M4A, WebM, FLAC → WAV / MP3 / WebM / OGG · converted in your browser