Initializing... drag & drop files here
Supports: MP3
Both MP3 and OGG (Ogg Vorbis) are lossy formats, so converting one to the other is a second generation of compression — it never adds quality back, and it can shave off a little. Convert MP3 to OGG when your target requires OGG (game engines like Godot and Unity, royalty-free web pipelines, or OpenAL audio); if you just want a smaller or better-sounding file, re-encode from a lossless source instead.
| Property | MP3 (MPEG-1 Layer III) | OGG (Vorbis) |
|---|---|---|
| Standardized / released | ISO/IEC 11172-3, published 1993 | Vorbis 1.0, released May 8, 2000 |
| Maintainer | MPEG / ISO-IEC | Xiph.Org Foundation |
| Compression | Lossy (perceptual) | Lossy (perceptual) |
| Licensing | Patent-free in the US since April 16, 2017 | Royalty-free and patent-free from day one |
| Native VBR | Bolted on later (LAME -V presets) |
Designed VBR-first; quality is set by a -q scale |
| Bitrate range | 32–320 kbit/s (14 fixed steps) | ~45–500 kbit/s nominal |
| Quality per bitrate | Good; the long-time default | Generally edges out MP3 at 96–192 kbit/s |
| Browser playback | Universal | Chrome 4+, Firefox 3.5+, Edge 17+, Safari 18.4+ |
| Apple ecosystem | Native everywhere | No native iTunes / Apple Music import |
| Best for | Maximum device compatibility | Game audio, royalty-free projects, the open web |
.ogg..ogg. Leave it on Vorbis unless your target specifically wants Opus, FLAC, or Speex inside an Ogg container.Already have the file backwards, or want the cleanest possible OGG? Go OGG to MP3 for the reverse, or encode straight from lossless with WAV to OGG to skip the double-compression penalty entirely.
A little, and you can't get it back. Your MP3 has already discarded inaudible data once; re-encoding to Vorbis runs that lossy pass a second time, so faint artifacts can compound. The damage is small if you keep the OGG bitrate at or above the MP3's, but converting MP3 to OGG is never a quality upgrade — it's a format change. For the best-sounding OGG, encode from a lossless WAV or FLAC original instead of from an MP3.
At 96–192 kbit/s, Vorbis generally sounds a touch better than MP3 because it was designed with a more modern psychoacoustic model and is VBR-first. In our testing, a 192 kbit/s Vorbis encode held up slightly better on cymbals and reverb tails than a 192 kbit/s CBR MP3 of the same source. The gap is small and shrinks at higher bitrates — and it does not undo the loss already baked into an existing MP3.
The usual reason is a target that demands OGG. Godot and Unity import Ogg Vorbis natively for compressed game audio, OpenAL-based engines expect it, and royalty-free or open-source projects favor it because Vorbis has been patent-free since launch. If nothing in your workflow requires .ogg, keeping the MP3 avoids an unnecessary generation of compression.
Not as ID3. Ogg files store metadata in Vorbis comments instead, so common fields — title, artist, album, date, genre — are mapped across during conversion, but ID3-specific structures don't transfer one-for-one. Embedded cover art is supported in Ogg but handled differently than in MP3, so double-check artwork survived if it matters to you.
Not through the native Apple music apps — iTunes and Apple Music still won't import Ogg Vorbis. iOS Safari can play .ogg in a web page starting with version 18.4 (2025), and third-party apps like VLC handle it on any iPhone, but if your audience lives in the Apple ecosystem, MP3 or AAC is the safer share format. Use OGG to MP3 when you need broad device support.
Both are Xiph.Org codecs that live in an Ogg container, but Opus is the newer one and is more efficient below ~96 kbit/s, which is why it dominates voice chat and streaming. Vorbis remains the default for game engines and older Ogg pipelines. If your target accepts either, MP3 to Opus is worth considering for low-bitrate or voice-heavy material; stick with Vorbis when the toolchain expects .ogg specifically.
Match or slightly exceed your source MP3 so you don't add audible loss: a 128 kbit/s MP3 maps well to a 128K Vorbis target, and a 320 kbit/s MP3 to 256K–320K. Going higher than the source can't restore detail the MP3 already threw away — it just makes a bigger file. For music headed to the web, 160K–192K Vorbis is a sensible transparency point.