A voice memo stuck in M4A, a FLAC rip too large to share, a WAV recording your editing software won’t touch until it’s MP3. Audio format mismatches waste time. This converter runs entirely in your browser: drop your files, pick MP3 or WAV, and download. No uploads, no accounts, no software to install.

What this converter does

Add one or more audio files, choose MP3 or WAV as the output, and click Convert. Each file decodes and re-encodes independently right in your browser tab. A preview button on each file lets you listen before or after converting, and a download link appears the moment a file finishes.

Input formats: anything your browser can play, which typically covers MP3, WAV, OGG, M4A/AAC, and FLAC. Output formats: MP3 (with a choice of bitrate) or WAV.

Add multiple files and a Download all as ZIP button appears once two or more are done, so you’re not clicking through downloads one at a time.

MP3: the practical choice for sharing

MP3 is the default for a reason. Every phone, app, and piece of software plays it without a second thought, and at 192 kbps or higher, the difference from the original is inaudible for most listening situations. Smaller files also mean faster uploads and less storage used, which matters when you’re sending a podcast episode or a batch of voice memos.

Pick a bitrate based on what the audio actually is. Speech and voice memos hold up fine at 128 kbps. Music benefits from 192 kbps as a safe middle ground, and 320 kbps is there for when you want the smallest possible quality loss, at the cost of a bigger file.

WAV: when you need the original data intact

WAV stores audio uncompressed, sample for sample, with nothing discarded. That makes files considerably larger than MP3, but it’s the format editing software, DAWs, and some hardware samplers expect before they’ll work with a file properly.

Convert to WAV when you’re about to edit, mix, or process the audio further, when a tool explicitly asks for it, or when you’d rather keep a lossless copy before doing anything lossy to it later.

Converting voice memos and phone recordings

Voice memo apps on phones typically save in M4A or AAC, formats that play fine on the phone itself but occasionally trip up older software, some transcription tools, or specific upload forms that only take MP3 or WAV. Drop the file in, pick your output format, and convert, no re-recording or screen-recording the audio needed.

How the conversion actually works

Nothing gets uploaded anywhere. Your browser reads the audio file, decodes it into raw audio data using the Web Audio API, and re-encodes that data into the format you picked using JavaScript running locally on your device. The file never leaves your browser tab, which matters if you’re converting anything you’d rather not put on a server, interview recordings, personal voice memos, or anything else meant to stay private.

Because everything runs on your device’s own processor, very long files (an hour-long podcast episode, for instance) take a bit longer to convert than a short clip. That’s normal and expected for local, in-browser processing.

If you need a specific test tone rather than converting an existing recording, the Tone Generator creates pure sine, square, triangle, and sawtooth tones at any frequency, useful for testing speakers or tuning by ear.