Audio Converter
Convert audio files to MP3, WAV, M4A, OGG, or FLAC — entirely in your browser
All processing happens in your browser. Files are not uploaded to any server.
Audio Converter Guide
The Audio Converter lets you change the format of any audio file directly in your browser using ffmpeg.wasm. Select one or more files, choose an output format and bitrate, then click Convert. Finished files download automatically. Nothing is sent to a server.
Supported Formats
Input support depends on the file codec and FFmpeg build. Output options are MP3, WAV, M4A, OGG and FLAC. Converting to WAV or FLAC does not recover information already lost in the source; bit depth and sample rate changes can also affect the result.
Choosing a Bitrate
For MP3: 320 kbps is the highest quality and recommended for archiving. 192 kbps is a good balance for general listening. 128 kbps is suitable for voice or bandwidth-limited situations. For M4A (AAC): 256 kbps sounds nearly identical to lossless at a much smaller file size. For OGG (Vorbis): 192 kbps is a solid choice for music. OGG is an open-source format well-supported on Android and Linux.
Tips
WAV is best when you plan to do further editing or mastering — it avoids quality loss from re-encoding. Use MP3 or M4A for sharing on social media or streaming platforms. Batch conversion is supported: select multiple files at once and they will be processed in parallel up to your device's CPU capacity.
How to use this tool and common questions
Convert audio to MP3, WAV, M4A, OGG or FLAC with ToneNook. Choose your output format and process multiple audio files directly in your browser.
- Which output formats are supported?
- Output formats are MP3, WAV, M4A, OGG and FLAC. Choose files, select a format and any available quality options, then convert. Input support depends on the codec.
- Does converting MP3 to WAV improve quality?
- Converting to WAV or FLAC cannot restore sound lost through lossy compression. Use conversion when you need a particular format for editing or delivery.