AC3 file format
Dolby Digital · Audio · .ac3
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AC3 (Dolby Digital) is the surround-sound format used on DVDs and TV broadcasts.
Technical details
| Full name | Dolby Digital |
|---|---|
| File extension | .ac3 |
| MIME type | audio/ac3 |
| Audio codecs we export | Dolby Digital AC-3 |
| Best for | Home theatre and DVD audio |
Last updated 2026-11-13
AC3 FAQ
What is a AC3 file?
AC3 (Dolby Digital) is an audio format. AC3 (Dolby Digital) is the surround-sound format used on DVDs and TV broadcasts.
How do I open a AC3 file?
Most modern players such as VLC open AC3 files. If yours doesn't, convert it to MP3 above, which plays on every device.
How do I convert a AC3 file?
Drop the file into the converter on this page, choose the output format and click “Convert & download”. It's free and runs in your browser without uploading.
What is AC3 best for?
Home theatre and DVD audio.