Convert MP3 to OGG
To convert MP3 to OGG, add your .mp3 file below and press the button: it's processed on your own device and you download the result, with nothing uploaded. It's free, needs no account, and works with files up to 500MB.
About converting MP3 to OGG
MP3 (.mp3) files can be converted to OGG entirely in your browser — no software to install, no file upload, and no account required. The conversion runs on a WebAssembly build of ffmpeg directly on your device.
Technical comparison
| MP3 | OGG | |
|---|---|---|
| Category | audio | audio |
| Compression type | Lossy | Lossy |
| Typical file size | Small — roughly 1MB per minute at 128–192kbps | Small — comparable to or smaller than MP3 at a given bitrate |
| Transparency support | N/A (audio) | N/A (audio) |
How to convert MP3 to OGG privately
Every step below runs on a WebAssembly build of ffmpeg inside this browser tab. Your .mp3 file is never uploaded to a server — there's no network request carrying it anywhere.
Add your MP3 file
Drag and drop, or click to select, a file (.mp3). It's read straight from disk into browser memory — no upload step exists.
Convert locally
FreePrivateConvert converts it to OGG using a WebAssembly build of ffmpeg, entirely within this browser tab.
Download the result
Save your converted .ogg file. It only ever existed in this tab's memory — closing the tab without downloading discards it completely.
Convert MP3 to OGG with ffmpeg (command line)
Prefer the terminal? This is the exact ffmpeg command this page runs for you:
ffmpeg -i input.mp3 -c:a libvorbis -q:a 5 output.ogg- -i input.mp3
- Your MP3 file.
- -c:a libvorbis
- Encode the audio as Ogg Vorbis.
- -q:a 5
- Vorbis quality level 5 on a 0-10 scale (5 is roughly 160 kbps).
- output.ogg
- The OGG file to create. ffmpeg picks the container from this extension.
Don't have ffmpeg installed? You don't need it: use the converter at the top of this page. It runs the same conversion on your own device, and your file is never uploaded.
FAQ
- Is my file uploaded anywhere?
- No. Your file is read and processed inside this browser tab and never leaves your device. You can confirm it in your browser's developer tools: the Network tab shows no upload.
- Does converting MP3 to OGG reduce quality?
- Ogg Vorbis is lossy and MP3 was already compressed, so this is a second lossy encode at Vorbis quality 5 (around 160 kbit/s), fine for most listening.
- Is there a file size limit?
- Yes: 500MB per file. There's no account and no limit on how many files you convert.
- What's the difference between MP3 and OGG?
- MP3 (MPEG-1 Audio Layer III) and OGG (Ogg Vorbis) store data differently. Both use the same kind of compression: lossy. OGG is an open, patent-free audio container and codec developed by Xiph.Org — a licensing-free alternative to MP3.
- Why convert MP3 to OGG?
- Common uses for OGG: Open-source software and game audio assets; Self-hosted media where licensing matters; Streaming platforms built on open codecs. Completely free of patent licensing fees, unlike MP3's historical licensing requirements.
- What MIME type does a .ogg file use?
- audio/ogg, the standard type for Ogg Vorbis.
- What is the ffmpeg command to convert MP3 to OGG?
- Run: ffmpeg -i input.mp3 -c:a libvorbis -q:a 5 output.ogg. This is the exact command FreePrivateConvert runs for this conversion, so you can use this page instead of installing ffmpeg: it runs the same conversion inside your browser.
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