Free online tool
Convert Audio Format
Convert MP3, WAV, FLAC, AAC, OGG, M4A and more — instantly, in your browser.
Drag & drop audio files here
MP3 · WAV · FLAC · AAC · OGG · OPUS · M4A · WMA · AIFF · and more
Audio sounds damaged or noisy?
Professional restoration by real engineers — noise removal, voice clarity, echo reduction.
Why use this tool?
100% private
Your audio never leaves your device. All conversion happens locally via WebAssembly.
6 output formats
MP3, WAV, FLAC, AAC, OGG and M4A — with per-format quality controls.
Supports 10+ input formats
MP3, WAV, FLAC, AAC, OGG, OPUS, M4A, WMA, AIFF and more.
Batch conversion
Drop multiple files and convert them all at once in a single click.
Quality controls
Set bitrate for MP3/AAC, bit depth and sample rate for WAV, compression for FLAC.
Completely free
No account, no registration, no email. Open the page and start converting.
How to convert audio format online
- 1
Upload your audio files
Drag and drop or click to select files. Supports MP3, WAV, FLAC, AAC, OGG, OPUS, M4A, WMA, AIFF and more. Files stay on your device.
- 2
Choose output format
Pick MP3 for compatibility, WAV or FLAC for lossless quality, AAC for streaming, OGG for open-source projects, or M4A for Apple devices.
- 3
Click Convert
Hit the Convert button. You can click immediately — the audio engine loads in the background. Processing happens locally, no server involved.
- 4
Download
Download files one by one or grab all at once. No registration, no email, no waiting.
Which format should I choose?
Most compatible format. Works everywhere — phones, cars, streaming platforms. Best for sharing and general use. 192–320 kbps recommended.
Uncompressed lossless audio. Best for professional editing and archiving. Large file sizes — not ideal for streaming.
Lossless compressed audio. Same quality as WAV but 40–60% smaller. Perfect for music archives and audiophile listening.
Better quality than MP3 at the same bitrate. Used by Apple Music, YouTube and Spotify. Great for streaming and mobile.
Open-source format with good quality. Used in games, web audio and open-source projects. Not supported by iTunes or some older devices.
AAC audio in an Apple container. Native format for iPhone, iTunes and macOS. Identical quality to AAC.
Professional audio restoration
Audio sounds noisy or unclear after converting?
Background hiss, hum, muffled speech, echo — these are fixable. WefixSound engineers professionally restore audio from interviews, films, podcasts, and archives. You only pay after approving a free sample.
Frequently asked questions
How do I convert audio files online for free?
Drop your audio files into the tool above, choose the output format (MP3, WAV, FLAC, AAC, OGG or M4A), and click 'Convert'. Everything runs in your browser — nothing is uploaded to any server.
What audio formats can I convert from?
You can convert from MP3, WAV, FLAC, AAC, OGG, OPUS, M4A, WMA, AIFF, MP2, AC3, and most other common audio formats.
What audio formats can I convert to?
You can convert to MP3 (most compatible), WAV (lossless, best for editing), FLAC (lossless, compressed), AAC (efficient streaming), OGG Vorbis (open format), or M4A (Apple ecosystem).
Will I lose quality when converting?
Converting to FLAC or WAV is lossless — no quality loss. Converting between lossy formats (MP3, AAC, OGG) involves re-encoding, which can reduce quality. For best results, convert from a lossless source (WAV or FLAC) to your target format.
Is my file uploaded to your server?
No. The converter runs entirely in your browser using WebAssembly (ffmpeg.wasm). Your audio files never leave your device.
Is there a file size limit?
There is no server-side limit since conversion happens locally. Practical limits depend on your device's RAM — files up to several GB work on most modern computers.