Turn MP3 files into OGG
Your MP3 goes in and an OGG comes out. OGG is a free audio format that sounds better than MP3 at the same file size, and the gap widens as files get smaller. Your file never leaves your computer.
Need the other direction? Convert OGG to MP3
How to convert MP3 to OGG
- 1 Drop your MP3 .mp3 file onto the page, or click to browse for it.
- 2 Set the quality, or leave the default, which keeps the file small without anything showing.
- 3 Convert. The work happens on your own machine, so how long it takes depends on your computer and the file.
- 4 Download the OGG, or add more files and do the whole set in one go.
Why convert MP3 to OGG
- Patent free and open, with no licensing to worry about.
- Better quality than MP3 at the same file size.
- Web audio where Safari is not the only target.
- MP3: detail is thrown away, and converting again takes a little more.
MP3 compared with OGG
How the two formats differ on the things that decide whether a conversion is worth making.
| Property | MP3 | OGG |
|---|---|---|
| File extension | .mp3 | .ogg |
| Browser support | Every browser | All current browsers |
| Introduced | 1993 | 2000 |
| Developed by | Fraunhofer IIS | Xiph.Org Foundation |
Quality and what changes
Both formats are lossy, so this is a second generation of compression: the MP3 is decoded back to pixels that already carry its artefacts, and OGG then compresses that. The damage compounds rather than cancelling out, which is why repeated round trips visibly degrade an image. Encode at a higher quality than the source used, and convert once from the best copy you have rather than from an already converted file.
- One OGG limitation to keep in mind: apple devices and many car stereos will not play it.
Questions about MP3 to OGG
Will converting MP3 to OGG lose quality?
A little. Both formats are lossy, so the file is decoded and compressed a second time and the two sets of artefacts add up. At a high quality setting the difference is hard to see, but avoid repeated round trips between lossy formats.
Is my MP3 file uploaded anywhere?
No. The whole thing runs inside the browser tab you already have open. Your MP3 is read straight from your own disk, converted on your machine and handed back as an OGG. Nothing is sent anywhere, nothing is stored and there is no account.
Is there a file size limit?
There is no server-side limit because no server sees the file. The real ceiling is your device memory, since the input and the output both have to fit in the tab. A few hundred megabytes is usually fine on a desktop machine and considerably less on a phone.
Can I convert several MP3 files at once?
Yes. Add as many as you like and they are processed one after another, then offered as separate OGG downloads or as a single ZIP. Speed depends on your own processor rather than on a queue.
Does the converter work offline?
Yes, after the page has loaded once. The engine is cached by the browser, so you can disconnect, reload and keep converting. That falls out of doing the work locally rather than being a separate mode you switch on.