Free online AC3 to FLAC converter

Can I convert .ac3 codec files to .flac audio format?

Convert AC3 to FLAC online - free

.ac3 .flac

Drop up to 3 .AC3 files here or click to browse

Max 30 MB per file · No registration required · max 90 MB total

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Sample rate

auto 22050 Hz 44100 Hz 48000 Hz

Channels

auto Mono Stereo

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How it works

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How to convert ac3 to flac file

June 7, 2026
Audio
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You can easily convert Audio Codec 3 Files directly to Free Lossless Audio Files (.ac3 to .flac conversion), since several audio editors and converters support such efforts.

Try using tools, such as for example MediaCoder or XRECODE3, as they let users import AC3 audio files and export them in FLAC format.

101convert.com assistant
1yr

Understanding AC3 and FLAC file formats

AC3 (Audio Codec 3) is a file format developed by Dolby Laboratories, primarily used for audio compression in DVDs, Blu-ray discs, and other digital video formats. It supports up to 6 channels of audio, making it ideal for surround sound systems.

FLAC (Free Lossless Audio Codec) is an open-source audio format known for its lossless compression, meaning it reduces file size without any loss in audio quality. FLAC is widely used for high-quality audio archiving and playback.

Why convert AC3 to FLAC?

Converting AC3 to FLAC is beneficial when you want to preserve the audio quality while reducing file size. FLAC files are also more versatile for playback on various devices and platforms.

Best software for AC3 to FLAC conversion

One of the best software options for converting AC3 to FLAC is VLC Media Player. It is a free, open-source media player that supports a wide range of audio and video formats.

Steps to convert AC3 to FLAC using VLC Media Player

Open VLC Media Player.
Go to Media → Convert/Save.
Click on Add and select the AC3 file you want to convert.
Click on Convert/Save at the bottom.
In the Profile dropdown, select Audio - FLAC.
Choose a destination file by clicking Browse and set the output file name with a .flac extension.
Click Start to begin the conversion process.

Alternative converters

Other reliable converters include Freemake Audio Converter and Audacity. Both offer user-friendly interfaces and support a variety of audio formats.

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AC3 vs FLAC: format comparison

How the AC3 and FLAC formats compare on the properties that matter most for this conversion.

Comparison of the AC3 and FLAC file formats
Property	.AC3 Dolby Digital Audio	.FLAC Free Lossless Audio Codec
Compression	Lossy	Lossless
Audio quality	High	Lossless
Audio channels	Surround	Up to stereo
Metadata support	Basic	Extensive
Streaming	Yes	Partial
DRM protection	No DRM	No DRM
Opens in a web browser	No	Partial
Typical file size	Small	Medium
Open standard	Partly open	Yes
Best used for	Streaming	Music
Introduced	1995	2001
Developer	Dolby Laboratories	Xiph.Org Foundation
MIME type	audio/ac3	audio/flac

Open AC3 file Open FLAC file

Information about file extensions and file types is provided by File-Extensions.org

Frequently asked questions

Is the AC3 to FLAC converter free?

Yes, converting AC3 to FLAC on 101convert.com is completely free. No registration, email address or installation is required. If you need a higher file size limit or want to convert more files at once, see our plans.

How large can my AC3 file be?

You can upload AC3 files up to 30 MB and convert up to 3 files at once in a single batch. With a paid plan the limit is up to 1000 MB per file and 100 files at once, see our plans.

What happens to my uploaded files?

Files are processed automatically and deleted from our servers within a few minutes after conversion. We never view or share your files.

Do I need to install any software to convert AC3 to FLAC?

No. The AC3 to FLAC conversion runs entirely online in your browser and works on Windows, Mac, Linux, Android and iPhone.

Did the conversion fail?

In most cases, the cause is an incorrect file format. Please upload a valid AC3 file for this AC3 to FLAC conversion. Occasionally, the issue may be on our side. We analyze recurring conversion failures and disable or fix the converter if we detect a defect.

ac3 to fla ac3 to gsm

Additional formats for
ac3 file conversion

Reverse conversion

flac to ac3

Convert to flac from
other formats

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Free online AC3 to FLAC converter