AC3 Converter
Convert files to and from AC3 online for free. Fast, secure, and high-quality file conversion with no sign-up or software required.
Maximum file size is 1GB
How it works
Three steps to your converted file
Everything happens in your browser tab - upload, pick a format, download. The heavy lifting runs on our servers.
Upload your file
Drag and drop, click to browse, or paste a URL. Batches take up to 20 files at once - 230+ input formats across video, audio, image, document, and archive types.
Choose an output format
Pick from over a hundred output formats. Filter by category or search by name - every option is open to everyone, no account needed.
Convert & download
Hit Convert and grab your download link moments later. Originals are erased when the job completes; results are cleared within about an hour.
What is an AC3 file?
The AC3 format, technically known as Dolby Digital, is a perceptual audio coding standard developed by Dolby Laboratories and standardized under ATSC A/52. It employs the Modified Discrete Cosine Transform (MDCT) algorithm to compress audio data, supporting channel configurations ranging from mono up to 5.1 discrete surround sound channels (left, center, right, left-surround, right-surround, and LFE). AC3 is the standard audio track format for DVD-Video, Blu-ray Disc, and ATSC/DVB digital television broadcasting, utilizing metadata parameters like dialnorm to control dynamic range.
How to open an AC3 file
While modern Windows versions may decode AC3 natively within specific container formats, raw AC3 files often require third-party software due to licensing restrictions on the Dolby codec. VLC Media Player is the primary recommendation for opening AC3 files on Windows, macOS, and Linux, as it includes built-in A/52 decoders. Alternatively, users may install the K-Lite Codec Pack or use MPC-HC (Media Player Classic Home Cinema) to enable system-wide support for Dolby Digital streams.
AC3 Technical Info
- Full Name
- Audio Codec 3 (Dolby Digital)
- Developed By
- Dolby Laboratories
- Initial Release
- 1991
- MIME Type
- audio/ac3
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