Convert MP3 to AC3
Convert MP3 files to AC3 locally, completely free and with maximum privacy.
Drag and drop your files here
or click to browse local files (large files supported, limited only by browser RAM)
Upload FilesPlatform Statistics
How to convert MP3 to AC3
- Drop your .mp3 files above, or click Upload Files. You can add many files at once.
- AC3 is already selected as the output. Open the settings (gear icon) to fine-tune the result.
- Click Convert All. FFmpeg runs inside your browser through WebAssembly; nothing is uploaded.
- Download your .ac3 files as soon as each one finishes.
What to know about MP3 to AC3 conversion
- You can choose the bitrate, sample rate and channels (mono, stereo or a 3D spatial effect).
MP3 vs AC3
| Feature | MP3 (MPEG-1 Audio Layer III) | AC3 (Dolby Digital (AC-3)) |
|---|---|---|
| Compression | lossy | lossy |
| Best for | music libraries and playback on any device | surround sound on DVDs and home theaters |
| Opens in | every phone, car stereo, browser and media player | VLC, mpv and most media players, AV receivers and video editors |
MP3 (MPEG-1 Audio Layer III): The most popular lossy audio compression format, which revolutionized digital music sharing.
AC3 (Dolby Digital (AC-3)): A surround sound audio codec used on DVDs, Blu-ray discs, and digital television.
Conversion options
- Bitrate from 96 to 320 kbps
- Sample rate: 22.05, 44.1 or 48 kHz
- Mono, stereo or 3D spatial audio
- Playback speed (0.5× to 2×)
Frequently asked questions
Is it safe to convert MP3 to AC3 here?
Yes. Your files are processed entirely on your own device by WebAssembly code running in the browser. They are never uploaded, so nobody else can see them, and the converter keeps working even if your connection drops after the page loads.
Is there a file size limit?
There is no server-side limit. The only limit is the memory available to your browser, typically 1.5–4 GB on desktop computers.
Can I convert several MP3 files at once?
Yes. Add as many files as you like; they are converted in parallel according to your device's CPU cores, and you can apply the same settings to all of them.
Related conversions
Need the opposite? Convert AC3 to MP3.
Convert MP3 to other formats
Convert other formats to AC3
- MP4 to AC3
- WAV to AC3
- MOV to AC3
- M4A to AC3
- FLAC to AC3
- WEBM to AC3
- MKV to AC3
- AAC to AC3
- OGG to AC3
- OPUS to AC3
- AVI to AC3
- WMA to AC3
See every MP3 converter and AC3 converter, or browse the full converter directory.