AVI to MP3

Convert AVI to MP3 in three steps

1. Choose one or more AVI files, or try the included sample.
2. Pick your MP3 bitrate and press Convert to MP3. Keep this tab open while it works.
3. Listen to the preview and save individual files or download the batch as a ZIP.

When AVI to MP3 is the right move

AVI is an older Microsoft video container that is still common on archived footage, and you will meet it in old camcorders, screen captures, and downloaded clips. MP3 plays in every car stereo, phone, podcast host, and upload form, so converting closes the gap between the file you have and the tool you need. Everything stays on your device while it runs, so private recordings never reach a server.

What happens to the audio inside

The converter opens the AVI file and reads the primary audio track, which is often MP3, AC-3, or PCM. It decodes that audio and writes an MP3 at the bitrate you choose, which is small enough to email. The picture is ignored, so the MP3 contains sound only. Converting AVI audio to MP3 is a second lossy step for most sources, so match or exceed the source quality instead of going lower.

Size and settings

A 192 kbps MP3 uses about 1.4 MB per minute. Choose 128 kbps for speech, 192 kbps as the all-round default, and 256 or 320 kbps for music you plan to keep. The sample rate and channel layout of your AVI file are carried across, so a mono recording stays mono.

Troubleshooting and tips

AVI files from old cameras can carry audio that drifts slightly against the picture, but the soundtrack itself converts normally. Very large AVI files use a lot of memory, so convert a trimmed copy of anything over an hour. The first conversion of this format downloads an extra decoder of about 30 MB, and your browser keeps it for later. Only the decoder is downloaded. Your file is never uploaded. Convert a short file first to confirm that your browser can decode it, then run the rest as a batch and download the ZIP. Keep the original AVI until you have listened to the MP3 from beginning to end.