What Is an Audio Converter?
An audio converter is a tool that changes an audio file from one format to another — for example, converting a FLAC file to MP3, or a WAV recording to AAC. Different audio formats use different compression algorithms, bitrates, and container types, making them suited to different use cases: some prioritize quality, others prioritize compatibility, and others minimize file size.
This online audio converter runs entirely in your browser using FFmpeg compiled to WebAssembly — an encoding engine also used in professional media workflows. Your files never leave your device, which is useful for personal recordings and confidential audio. Only convert media you have permission to use.
Whether you need to shrink a WAV podcast for email, convert a FLAC album to MP3 for your phone, or extract AAC from a video file, format conversion is one of the most common audio tasks. Choosing the right output format balances file size, compatibility across devices, and fidelity — this guide and tool help you make that choice with confidence.
How to Convert Audio Files
Upload your audio
Drag and drop one or more audio files, or click to browse. Supported inputs include MP3, WAV, OGG, M4A, AAC, FLAC, and audio tracks from MP4/MOV video.
Choose output format
Select MP3 for broad compatibility, WAV for editing, FLAC for lossless storage, OGG for open workflows, or M4A for efficient AAC audio.
Adjust quality settings
Set bitrate for MP3 or AAC, choose an OGG quality level, and adjust sample rate or channel layout. A 192 kbps MP3 is a practical default for many music files.
Convert and download
Click Convert on individual files or Convert All for batch processing. Download each file or grab a ZIP of all converted outputs.
Audio Format Guide
Music, podcasts, and general sharing when compact size and broad playback support matter.
Audio editing and production workflows. Converting a lossy source to WAV does not restore previously removed detail.
Lossless music storage and archiving. File size varies with the source and encoder settings.
Web apps, Android devices, and open workflows that support the Ogg container and Vorbis codec.
Apple devices and apps that prefer AAC audio inside an MP4 container.
Streaming and broadcasting workflows that accept raw AAC audio.
What Is Bitrate?
Bitrate is the amount of audio data encoded per second, measured in kilobits per second (kbps). For the same lossy codec and source, a higher bitrate generally allows the encoder to retain more detail, but it also creates a larger file. Source quality, codec, sample rate, channels, and encoder behavior also affect the result. WAV and FLAC do not use the lossy bitrate choices shown for MP3 or AAC.
| Bitrate | Quality | Best Use | File Size (3 min) |
|---|---|---|---|
| 320 kbps | Highest MP3 setting | High-quality listening and sharing | ~7.2 MB |
| 256 kbps | Excellent | High-quality music collection | ~5.8 MB |
| 192 kbps | Very good | Recommended for most uses | ~4.3 MB |
| 128 kbps | Good | Podcasts, voice, casual listening | ~2.9 MB |
| 96 kbps | Acceptable | Voice calls, low-storage devices | ~2.2 MB |
Lossless vs. Lossy Audio
Lossless (WAV, FLAC)
- The lossless encoder does not discard decoded audio samples
- Converting a lossy source cannot restore missing detail
- WAV is uncompressed — FLAC is compressed losslessly
- File sizes are generally larger than lossy formats
- Best for archiving, editing, and audiophile listening
- Changing sample rate or channels still transforms the audio
Lossy (MP3, AAC, OGG, M4A)
- Uses perceptual encoding to remove audio information
- Significant file size reduction vs. lossless
- Quality depends on the codec, source, and selected bitrate or quality level
- Higher bitrates usually preserve more audible detail
- Re-encoding lossy → lossy degrades quality (generation loss)
- Best for streaming, storage, and everyday listening
Continue Your Audio Workflow
Need to edit before converting? Use the Audio Cutter for precise trim points, the Audio Speed Changer for tempo and pitch, or the Volume Booster for loudness adjustment. To combine multiple recordings, continue with the Audio Joiner; for a focused video extraction workflow, use Video to MP3.
Explore how listening formats changed from physical media to downloads, streaming, and algorithmic discovery in Music: Then vs Now.
Frequently Asked Questions
Technical note: This tool uses FFmpeg.wasm — a browser-compatible port of FFmpeg compiled to WebAssembly. The first conversion may take longer while the browser loads and initializes the required components; caching behavior varies by browser. Encoding speed depends on the file, selected codec, device, and available memory.
References: FFmpeg codec documentation and FFmpeg container-format documentation.