Skip to main content

Audio Converter

Convert between MP3, WAV, FLAC, M4A, AAC, OGG and OPUS.

Tap to choose an audio file

MP3, WAV, FLAC, M4A, OGG, AAC, OPUS · converted locally

Reset

Free Online Audio Converter

Convert audio between all the popular formats — MP3, WAV, FLAC, M4A, AAC, OGG and OPUS — without installing any software or creating an account. Just drop in a file, choose the format you want, and download the result. The whole thing runs inside your browser using WebAssembly, so your files are never uploaded to a server. That keeps your audio completely private and means there are no file-size caps beyond what your own device can handle.

Different formats exist for different jobs, and the right one depends on what you are trying to do. MP3 is the safe, universal choice — small files that play on every phone, car stereo, speaker and website. M4A/AAC is the format Apple devices love and usually sounds a little better than MP3 at the same size. OPUS is the most efficient option, giving great quality at tiny sizes, which makes it ideal for voice and streaming. When you need perfect, lossless quality for editing or archiving, choose FLAC (compressed but lossless) or WAV (raw and uncompressed).

This converter handles the everyday tasks people run into most. Turn a heavy FLAC into MP3 so it fits on your phone, convert a giant WAV to MP3 to save space, change an M4A to MP3 for an app or device that will not play Apple audio, or pull an OGG file into something more common. For the compressed formats you can also pick the bitrate, which lets you fine-tune the balance between sound quality and file size — higher for richer audio, lower for a smaller download.

There is no sign-up, no watermark and no daily limit, so you can convert as many files as you like. One thing worth knowing: converting a lossy file (like an MP3) into a lossless one (like FLAC) will not bring back detail that was already removed — the file just gets bigger. For the best results, always start from the highest-quality version of your audio you have.

How it works

1

Drop your file

Choose any audio file — MP3, WAV, FLAC, M4A, AAC or OGG. It is processed locally and never uploaded.

2

Pick format & quality

Select the output format and, for compressed formats, your preferred bitrate.

3

Convert & download

Click convert and your new file downloads automatically when it is ready.

Frequently asked questions

Is the audio converter free?▾
Yes — it is completely free with no sign-up, no watermarks and no daily limits. Convert as many files as you like.
Are my files uploaded to a server?▾
No. Conversion runs entirely in your browser with WebAssembly, so your audio never leaves your device and nothing is stored online.
Which format should I choose?▾
For universal playback and small files use MP3; for Apple devices use M4A/AAC; for the smallest files at good quality use OPUS. Choose FLAC or WAV when you want lossless quality for archiving or editing.
Will converting change the sound quality?▾
Converting into a lossless format (FLAC, WAV) keeps the quality of the source exactly. Converting into a lossy format (MP3, AAC, OPUS) removes some inaudible detail to save space — choose a higher bitrate if you want it as close to the original as possible.
Can I convert a lossy file to FLAC to improve it?▾
No. Detail that was already thrown away by an MP3 or AAC cannot be restored. Converting it to FLAC only makes the file larger without adding back any quality.
Why is the first conversion slower?▾
The first time you convert, your browser downloads the roughly 30 MB conversion engine. It is cached afterwards, so every later conversion starts instantly.

Related Tools

Video to MP3 Extract the audio track from any video and save it as an MP3. Audio Compressor Shrink audio files so they’re easy to email, message or upload. Audio Trimmer Cut any audio file to the exact part you want with a visual waveform. Audio Merger Join several audio files into one track — reorder them however you like.

Rate this tool

4.7 / 5 · 209 ratings