Audio to OPUS

Free online conversion of AC3, FLAC, M4A, MP3, OGG, PCM, WAV to OPUS

Local-first

Drop files here

or click to select files. Supports MP3, WAV, OGG, AC3, FLAC, OPUS, PCM, M4A.

Compatible with a variety of audio file formats, such as WAV, OGG, AC3, AAC, FLAC, Opus, PCM, M4A, etc., the local browser processes it directly without server upload, ensuring the security of your data. Quickly convert to OPUS format online. Experience the convenient and safe efficient audio format conversion service!

Convert any audio to OPUS online

Opus is the modern, open audio codec that delivers the best quality at low bitrates. It powers Discord, WhatsApp voice, WebRTC calls and streaming. This free tool converts MP3, WAV, M4A, FLAC, OGG and more to OPUS in your browser, giving you tiny files that still sound clear.

Best quality at low bitrates

Opus outperforms MP3 and AAC at low bitrates, which is why it is the default for voice chat and live streaming where bandwidth is limited. Converting to OPUS is ideal for voice messages, podcasts and any audio where a small, efficient file matters most.

Runs in your browser, files stay private

Conversion happens entirely on your device with WebAssembly — nothing is uploaded. No sign-up, no watermark and no file limit, and you can set the bitrate to balance OPUS size against quality.

Frequently asked questions

How do I convert audio to OPUS?

Open the tool, drop in your MP3, WAV, M4A, FLAC or OGG file, keep OPUS as the output and click convert. The OPUS is produced in your browser and downloads immediately.

Why convert to OPUS?

Opus gives the best sound quality at low bitrates of any common codec, which makes it ideal for voice, podcasts and streaming where small file size and clarity both matter. It powers Discord, WhatsApp and WebRTC.

Is the audio to OPUS converter free?

Yes, completely free with no sign-up, no watermark and no limit on the number or size of files you convert.

Is OPUS better than MP3?

At low and medium bitrates Opus generally sounds clearer than MP3 at the same size. MP3 still has wider hardware support, so choose OPUS when efficiency matters and MP3 for maximum compatibility.

Are my audio files uploaded to a server?

No. All processing runs locally in your browser, so your audio never leaves your device.