Tools › Audio tools › Audio Format Converter
Convert an audio file's format. Load WAV, MP3, M4A (AAC), FLAC, or anything else your browser can play, and save it as MP3 or WAV. Batch conversion supported.
Your audio is never sent to a server (the conversion engine itself is downloaded from a third-party site the first time you use this tool)
How to use
- Choose the audio files you want to convert (multiple allowed).
- Pick a target format (MP3 or WAV). For MP3, also choose a bitrate (quality level).
- Press "Convert" to start. Save files individually once done, or press "Download all as ZIP" for the whole batch.
MP3 or WAV — which should I pick?
| Format | Characteristics | Best for |
|---|
| MP3 | Trades a little quality for a much smaller file. Plays on virtually any device or app. | Social media, everyday listening, general use |
| WAV | Uncompressed — no quality loss, but larger files. | Importing into video or audio editing software |
MP3 is the right default for most people — a good balance of size and compatibility. Choose WAV if you're feeding the file into editing software or want zero quality loss.
Common conversions
- M4A (iPhone voice memos) → MP3: make a recording from an iPhone easier to use on Windows or other apps
- WAV → MP3: shrink a WAV file recorded with a mic or recording app
- FLAC → MP3 / WAV: turn a high-quality FLAC file into a widely compatible MP3, or an editable WAV
- MP3 → WAV: convert MP3 audio to an uncompressed format for editing software
What this doesn't support
Exporting to M4A (AAC) isn't supported. Encoding AAC requires a much heavier library (tens of megabytes), which would go against the "stays light, runs entirely in your browser" approach used across this site. MP3 and WAV output cover the great majority of practical needs.
FAQ
Is my audio uploaded to a server?
No. Loading, converting, and saving all happen entirely in your browser. Only the MP3 encoding engine itself is downloaded from a distribution site on first use — your audio is never sent anywhere.
Can I convert to M4A or FLAC?
No — the only output formats are MP3 and WAV. Encoding to M4A (AAC) would require a large dedicated library, so this tool sticks to MP3 and WAV to stay lightweight.
Can I extract audio from a video file?
Video files with an audio track (mp4, webm, etc.) can sometimes have just their audio portion loaded and converted. The video itself isn't edited or saved.
Does the audio quality change?
Converting to WAV doesn't change quality. Converting to MP3 introduces some quality loss depending on the bitrate you choose — higher bitrates mean less loss.
The Audio Transcription tool couldn't load my file. Will this help?
If the speech-recognition tool doesn't support your file's particular format or codec, converting it to MP3 or WAV here first often resolves it — then try the transcription tool again.