Audio Converter
PopularNewConvert audio files between formats like MP3, WAV, OGG, and AAC directly in your browser.
Your files are processed entirely in your browser. Nothing is uploaded to any server, and your documents never leave your device.
What is Audio Converter?
An audio converter changes a sound file from one format to another - for example turning a WAV recording into a small MP3, or an M4A voice memo into a universally supported format. This tool runs FFmpeg in your browser through WebAssembly, decoding your file and re-encoding it with the proper codec for the target format (LAME for MP3, Vorbis for OGG, AAC for M4A, PCM for WAV). Your audio never leaves your device.
Why use Nuo Tools's Audio Converter?
How to use Audio Converter
Drop an audio file into the tool - almost any format is accepted.
Pick the output format: MP3 for universal playback, WAV for editing, OGG or M4A for efficiency.
Click Convert and watch the progress bar.
Download the converted file when it finishes.
Frequently asked questions
Is my audio uploaded to a server?+
No. The conversion runs entirely in your browser using FFmpeg compiled to WebAssembly. Your files never leave your device, making the tool safe for private recordings.
Which format should I choose?+
MP3 is the safest choice for compatibility. WAV is uncompressed and ideal for further editing. OGG and M4A (AAC) sound better than MP3 at the same file size but are slightly less universally supported.
Will converting reduce audio quality?+
Converting between lossy formats (MP3, OGG, AAC) always costs a little quality, though at the bitrates used it is rarely audible. Converting to WAV never loses quality but produces much larger files.
Why does the first conversion take a moment to start?+
The tool downloads its audio engine (about 31 MB) the first time you use any audio or video tool in a session. After that one-time load, conversions start instantly.
Can I convert video files to audio here?+
This tool accepts audio files. To pull the soundtrack out of a video, use the Video to MP3 tool in the Video Tools category - it is built exactly for that.
When to use this tool
- →Converting a WAV export into a small MP3 for sharing
- →Turning an iPhone M4A voice memo into an MP3 that plays anywhere
- →Making a WAV copy of a compressed file for audio editing software
- →Converting music files for a device that only supports certain formats
- →Preparing audio in the exact format an upload form requires