AVI to OPUS Converter

Convert AVI files to OPUS free in your browser — no signup, no install, and the file is never uploaded to a server. OPUS compresses further, so the file gets noticeably smaller.

Completely free Files are never uploaded No signup required
Drop files or click to select
AVI → OPUS

What changes in this conversion

  • OPUS uses lossy compression, so some audio detail is discarded permanently in exchange for a much smaller file.
  • OPUS is a newer format — check that the software or device you are sending it to supports it before switching.
  • Only the audio track is kept — the video picture is discarded, so the result is far smaller than the original AVI file.

How to use

  1. Add your AVI file

    Drag the AVI file onto the drop area above, or click it to pick a file from your device. You can add several files at once.

  2. Confirm OPUS as the output

    OPUS is already selected as the output format on this page. You can pick the bitrate — higher keeps more of the sound, lower makes a smaller file.

  3. Run the conversion

    Press the convert button. Video is re-encoded frame by frame on your own machine, so a long clip can take several minutes. The tab has to stay open.

  4. Download the OPUS file

    When it finishes, download the OPUS file. Converting multiple files gives you the option to download them together as a ZIP.

About these formats

AVI AVI Video

An old video container created by Microsoft in 1992. Compatibility is broad, but support for modern codecs and subtitles is limited.

Commonly used for Legacy video files, older camcorder recordings

AVI File format reference

OPUS Opus Audio

A modern codec offering the best efficiency available today for both speech and music. Discord, WhatsApp, and other real-time voice services use it.

Commonly used for Voice calls, podcasts, low-bandwidth audio

OPUS File format reference

Frequently asked questions

Is converting AVI to OPUS really free?

Yes. AVI to OPUS conversion is completely free with no signup, no watermark, and no daily limit on the free plan for ordinary use.

Are my AVI files uploaded to a server?

No. The conversion runs entirely inside your browser using WebAssembly, so the AVI file never leaves your device. That is also why it works without an internet connection once the page has loaded.

Does converting AVI to OPUS reduce quality?

OPUS uses lossy compression, so some detail is discarded. At high quality settings the difference is usually invisible, and the file becomes far smaller.

Will the OPUS file open everywhere?

OPUS is a newer format. Current browsers and phones handle it, but older desktop software may not — keep the original AVI if you have to send it to someone on an old machine.

Does the picture disappear when I convert AVI to OPUS?

Yes — OPUS is an audio format, so only the soundtrack is extracted. The video track is dropped, which is usually the point when you want just the audio.

Is there a file size limit for AVI to OPUS conversion?

The free plan handles files up to 200MB. Because processing happens on your own device, very large files depend on your computer's memory rather than a server quota.

Convert AVI files to other formats

AVI AAC AVI FLAC AVI GIF AVI M4A AVI MKV AVI MOV AVI MP3 AVI MP4 AVI OGG AVI WAV AVI WEBM

Convert other formats to OPUS

3G2 OPUS 3GP OPUS AAC OPUS AC3 OPUS AIF OPUS AIFF OPUS ALAC OPUS AMR OPUS ASF OPUS AU OPUS DIVX OPUS DTS OPUS

Video converter

What each file format is, what it is used for, and which formats it can be converted to.

Open converter Browse the full format reference