Convert MP3 to AC3 Online — Free
Fast, free MP3 to AC3 converter. No registration required.
Drop files here or click to browse
Supports: MP3 files
Max: 100MB (free) · 2GB (Pro)
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How to Convert
Upload your .mp3 file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .ac3 file when it's ready.
What is MP3?
MP3 is the most popular audio format worldwide. It uses lossy compression to reduce file size while maintaining acceptable audio quality for most listeners.
Format Details
- Full Name
- MPEG Audio Layer III
- Extension
- .mp3
Key Features
- Universal compatibility
- Small file sizes
- Streaming support
- ID3 tag support
What is AC3?
AC3 is Dolby Digital's audio format commonly used in DVDs, Blu-rays, and streaming services. It supports surround sound up to 5.1 channels.
Format Details
- Full Name
- Dolby Digital Audio
- Extension
- .ac3
Key Features
- Surround sound
- DVD/Blu-ray
- 5.1 channels
- Dolby standard
MP3 vs AC3
| Feature | MP3 | AC3 |
|---|---|---|
| Full Name | MPEG Audio Layer III | Dolby Digital Audio |
| Extension | .mp3 | .ac3 |
| Best For | Universal compatibility | Surround sound |