Turn MP3 audio files into AC3. It is converted in your browser, so the file never leaves your device.
Drop MP3 files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Drop MP3 files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
Press Convert. Open Options first if you want to change the defaults. The work happens in this tab.
Save the AC3, or download everything as one ZIP if you converted several files.
The MP3 to AC3 converter is part of this page and runs inside your browser. Your audio files are never sent to ToAny or to anyone else.
Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
MP3 is lossy, so editing or re-saving it repeatedly degrades the sound. AC3 is what DVD authoring tools, TVs and home-theatre systems expect for surround sound. MP3 is at home in music and podcasts that must play anywhere; AC3 is the usual choice for surround-sound film audio. Both formats are lossy, so the content is compressed a second time; start from the best copy you have.
The defaults suit most files. Under Options you can choose the bitrate and trim the start and end.
This pair uses the compatibility engine, ffmpeg built for the browser, because AC3 cannot be written by the browser's built-in codecs. It is a one-off download of about 10 MB that the browser keeps, it is slower than the built-in codecs, and it takes files up to 1 GB. AC3 is written at 192 kbps unless you choose another bitrate.
MP3 is the audio format everything plays. It shrinks audio to roughly a tenth of its uncompressed size by discarding sound most listeners cannot hear. Newer codecs are more efficient, but nothing matches its compatibility.
Opens in Every phone, computer, car stereo and speaker
MP3 converterAC3 is the codec behind Dolby Digital, the surround-sound format of DVDs, digital television and many streaming services. A file can carry up to 5.1 channels. Most stereo music players do not handle it, so the track is usually extracted for editing or for devices that expect something else.
Opens in TVs, home-theatre receivers, DVD and Blu-ray players and VLC; many phones and browsers do not play it directly
AC3 converter| MP3MP3 audio | AC3Dolby Digital audio | |
|---|---|---|
| Stands for | MPEG-1 Audio Layer III | Dolby Digital (Audio Codec 3) |
| Type | Audio | Audio |
| Compression | Lossy | Lossy |
| Introduced | 1993, by the Fraunhofer Society and the Moving Picture Experts Group | The early 1990s, by Dolby Laboratories |
| Opens in | Every phone, computer, car stereo and speaker | TVs, home-theatre receivers, DVD and Blu-ray players and VLC; many phones and browsers do not play it directly |
| Best for | Music and podcasts that must play anywhere | Surround-sound film audio |
| File extension | .mp3 | .ac3 |
No. The MP3 to AC3 conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
AC3 is a lossy format, so a small amount of detail is traded for a smaller file. At the default setting the difference is hard to notice. You can choose the bitrate under Options.
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the MP3 file, press Convert and save the AC3. There is nothing to install.
Yes. MP3 to AC3 runs on the compatibility engine, which takes files up to 1 GB, and a long clip takes a while because it is slower than the browser's built-in codecs. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.