Compress Opus to MP3

Need smaller audio files? Converting Opus to MP3 dramatically reduces file size. A 50MB file becomes 5MB. Perfect for email, sharing, and storage.

OpusMP3

Drop your Opus file here or click to browse

Opus (.opus) · Max 20 MB

Opus files are already compressed, but MP3 can compress further at a different bitrate. The size reduction is significant for sharing, uploading, and storage.

For email attachments, 128-192kbps works well. For music sharing, use 256-320kbps. AudioUtils lets you drop your file and convert instantly. No upload to a server, no waiting.

You won't save meaningful space — the two formats are within touching distance at 0.5–1.4 MB per minute. Re-encoding lossy to lossy compounds artifacts. Convert once, at a high bitrate, and keep the result rather than round-tripping again.

Opus files come from Discord recordings, WhatsApp and Telegram voice messages, and WebRTC captures. Opus is the best lossy codec in use, but it lives inside apps — car stereos, older iPhones and smart speakers won't play it — which is the whole reason this conversion exists. MP3 is the destination because it plays essentially everywhere — downloads and every ordinary phone, browser, and player. File size stays in the same ballpark — both formats land around 0.5–1.4 MB per minute. Both Opus and MP3 are lossy, so this pair stacks a second encode — at a generous bitrate it stays inaudible, but if a lossless original of the Opus exists, encode the MP3 from that instead.

Frequently Asked Questions

How much smaller will the file get?

You won't save meaningful space — the two formats are within touching distance at 0.5–1.4 MB per minute.

What bitrate keeps the quality acceptable?

192–256 kbps is transparent for most music, 128 kbps is fine for speech, and 64–96 kbps mono is plenty for pure voice — halving the size again with no real cost. Below that you start hearing it.

Will compressing damage the audio?

Re-encoding lossy to lossy compounds artifacts. Convert once, at a high bitrate, and keep the result rather than round-tripping again.

Should I compress a master or an archive copy?

Never the master. Compress a copy for sharing and listening, and keep the original — you can always re-encode from it, but you can never re-create what a lossy encoder discarded.

Is this compressor free?

Yes. Free users get 5 conversions per month. The output is limited to the first 10 seconds as a preview, with a 20MB input file size limit. Upgrade to Pro for unlimited, full-length conversions.