MP3 to Opus
MP3 to Opus is a free online audio converter for changing MP3 files into OPUS files. MP3 to Opus accepts 2 MIME types, returns audio/opus, includes 1 setting, and runs in your browser on the device.
Drop .mp3 file here
or click to choose
Options
Key facts
- Input
- 1 format: MP3 (audio/mpeg, audio/mp3)
- Output
- OPUS (audio/opus)
- Runtime
- your browser on the device
- Settings
- 1 control: Opus bitrate
- File mode
- 1 input file creates 1 output file
- Cost
- $0, no account required
How to use MP3 to Opus
- 1
Open your MP3 file
Drop your MP3 file onto the page, or click to browse and pick one from your device.
- 2
Choose options
Adjust the conversion options to suit your needs. Defaults work well for most inputs.
- 3
Convert and download
Click Convert. Your OPUS file is ready to download in seconds.
MP3 to Opus details
First, MP3 to Opus reads MP3 source files and prepares OPUS output for the audio workflow. Next, The visible controls are Opus bitrate. Additionally, Files and text stay in the browser session.
Re-encode an MP3 file as Opus, a modern open codec that delivers near-transparent quality at remarkably low bitrates; Opus at 96 kbps typically rivals MP3 at 160;192 kbps. Great for podcasts, voice notes, and anywhere bandwidth or storage matters. Because the source is already lossy, expect some loss in the re-encode. Runs entirely in your browser using ffmpeg.wasm; nothing is uploaded. Expect a few seconds for a 5-minute song.
Common searches
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Related tools
Tools that work with the same formats — most users open one of these next.
MP3 to AAC
Convert MP3 audio to AAC with selectable bitrate — free online, no upload.
Audio Trimmer
Cut a clip from an audio file — MP3, WAV, OGG, FLAC, M4A, AAC.
MP3 to WAV
Convert MP3 audio to uncompressed WAV — free online, no upload.
MP3 to OGG
Convert MP3 audio to Ogg Vorbis — free online, no upload.
MP3 to FLAC
Convert MP3 audio to FLAC (lossless) — free online, no upload.
MP3 to M4A
Convert MP3 audio to M4A (AAC in MP4 container) — free online, no upload.
Frequently asked
What is MP3 to Opus?
MP3 to Opus is a free online audio converter for changing MP3 files into OPUS files. MP3 to Opus accepts 2 MIME types, returns audio/opus, includes 1 setting, and runs in your browser on the device.
What files does MP3 to Opus accept and create?
MP3 to Opus accepts MP3 files (audio/mpeg, audio/mp3) and creates OPUS files (audio/opus). The page includes 1 setting: Opus bitrate.
Do my files and data stay private?
Yes. MP3 to Opus runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.
How do I use MP3 to Opus?
Open MP3 to Opus, drop in your MP3 file, choose any options, and click Convert. Your browser does the work locally and produces a OPUS file you can save right away.
What is the maximum file size for MP3 to Opus?
Because MP3 to Opus runs in your browser, the maximum size depends on your device's available memory. Most modern phones and laptops handle files up to a few hundred MB without issues.