Audio Converter
Convert audio between MP3, WAV, M4A, OGG and FLAC in your browser, with a bitrate choice. Free, private, no signup or upload.
About the Audio Converter
This free audio converter switches your audio between the most common formats — MP3, M4A (AAC), OGG (Vorbis), FLAC and uncompressed WAV — with a single click. For the lossy formats you pick the bitrate, from a compact 128 kbps up to a near-transparent 320 kbps, so you control the balance between size and quality.
All conversion runs inside your browser using FFmpeg compiled to WebAssembly, so your audio is never uploaded to a server. The engine (about 30 MB) downloads from a CDN the first time you use any converter here and is then reused, which is why the very first conversion takes longer than the rest.
One honest note: converting between lossy formats (for example MP3 to M4A) cannot add back detail that earlier compression removed. For archiving choose FLAC or WAV; for sharing, MP3 or M4A at 192 kbps or higher is a good balance. Files up to 100 MB are supported.
How to Use the Audio Converter
- 1Choose an audio file (MP3, WAV, M4A, OGG or FLAC), up to 100 MB.
- 2Pick the target format.
- 3For lossy formats, select a bitrate — 192 kbps is a good default.
- 4Click Convert Audio, preview the result and download it.
Frequently Asked Questions
Is my file uploaded to a server?
No. All processing runs in your browser using FFmpeg compiled to WebAssembly. Your file never leaves your device — only the converter engine is downloaded, once.
Why is the first run slow?
The first time you use any converter here, the browser downloads the FFmpeg core (about 30 MB) from a CDN and compiles it. It is then cached for the session, so later runs are much faster.
Which format should I choose?
MP3 is the most universally compatible. M4A (AAC) sounds slightly better at the same bitrate. OGG is open and efficient. FLAC and WAV are lossless — larger, but perfect for editing or archiving.
Will converting improve quality?
No. Converting between lossy formats can only preserve or reduce quality, never add it. To keep the most detail, convert to a lossless format like FLAC or WAV, or use a high bitrate.
Is there a file size limit?
Yes, 100 MB per file. Because everything runs in your browser's memory, very large files can be slow or run out of memory. Trim long clips first if you hit the limit.