How to use it· 4 steps
- Drop your OGG file into the box above, or click it to choose one.
- Leave “Convert to” on MP3 and pick a bitrate — 192 kbps suits most sources; choose Mono for speech.
- Press Convert audio. The first conversion downloads a 32 MB engine; after that it starts at once.
- Listen to the result on the page, then press Download to save the MP3.
Step by step
How to use the ogg to mp3 converter
- 1Drop your OGG file into the box above, or click it to choose one.
- 2Leave “Convert to” on MP3 and pick a bitrate — 192 kbps suits most sources; choose Mono for speech.
- 3Press Convert audio. The first conversion downloads a 32 MB engine; after that it starts at once.
- 4Listen to the result on the page, then press Download to save the MP3.
What is inside an OGG file
Ogg is an open container from the Xiph.Org Foundation. An .ogg file usually carries Vorbis audio, the patent-free codec introduced around 2000 as an alternative to MP3; newer files often carry Opus, Vorbis's successor, which is especially efficient for speech. The extension does not tell you which — and the converter does not need to know, since it reads both.
Both codecs are lossy and both are efficient: a Vorbis file at about 160 kbps is commonly compared with MP3 at around 192 kbps, and Opus at 64 kbps is very good for voice. That efficiency is why games, open-source software and messaging apps use Ogg.
Why convert OGG to MP3?
OGG files usually arrive as one of three things: voice messages saved from Telegram and similar apps, which record Opus in an Ogg wrapper; sound files extracted from games, or downloaded from Wikimedia Commons and other open archives; or recordings from Android apps and Linux software that default to Vorbis.
ITunes and the Apple Music app will not import OGG, and older iPhones and iPads cannot play it.
Video editors, car stereos and many Windows apps treat OGG as unknown.
Forwarding a voice message to someone, or to a transcription service, that only accepts MP3.
What happens to the sound
Ogg audio is already lossy, so the MP3 is a second generation. Because Vorbis and especially Opus are more efficient than MP3, the MP3 needs a higher bitrate than the source to sound the same: roughly 1.3 to 1.5 times the Vorbis bitrate for music, and around 96–128 kbps for an Opus voice note that was recorded at 24–32 kbps.
Do not expect the MP3 to sound better than the OGG. It can only reproduce what the OGG kept, including any warbling from a low-bitrate voice message.
About 0.5–1.5 MB per minute is typical for OGG. As MP3, multiply the minutes by 0.96 MB at 128 kbps, by 1.44 MB at 192 kbps or by 2.4 MB at 320 kbps; that is the whole calculation, because MP3 here is constant bitrate.
Settings that suit an OGG source
Voice notes: choose 64 or 96 kbps and Mono. Voice-message codecs record at 16 or 48 kHz mono; there is no stereo to keep.
Game music and sound effects: 192 kbps stereo. Leave the sample rate alone unless the destination demands 44.1 kHz — Opus always decodes at 48 kHz, which MP3 supports directly.
Vorbis comment tags (title, artist, album) carry across into ID3. Any embedded picture is dropped.
Problems you may run into with OGG
The browser cannot preview the OGG — Safari's support for Ogg has long been missing or partial. The preview may be blank, but ffmpeg converts the file regardless.
A WhatsApp voice note has an .opus extension instead — that is the same Opus audio in an Ogg container. Drop it here as it is; it converts the same way.
The OGG has several logical streams (chained Ogg) — some internet radio captures chain several songs in one file. ffmpeg reads the first stream; split the file in an editor if you need every part.
Your OGG stays on your device
A typical online converter needs your file on its machine before it can do anything, which means a copy of your OGG sitting in someone else's storage for a while.
This converter brings the conversion to the file instead. ffmpeg, compiled to WebAssembly, runs in the tab; the OGG is read locally and the MP3 is produced on your device.
What does cross the network is the engine: a 32 MB download on first use, cached for the session. Your audio is never part of any request — disconnect after the engine loads and the converter still works.
Answers
Frequently asked questions
Why can't my iPhone play OGG files?
Apple's Music app does not import OGG, and Safari's Ogg playback has long been missing or partial. MP3 avoids the problem entirely.
Will an MP3 be bigger than the OGG?
Usually yes. Vorbis and Opus pack more quality into each kilobit, so an MP3 of similar quality needs a higher bitrate — often 1.3 to 2 times the bytes.
Can I convert Telegram or WhatsApp voice messages?
Yes — save the voice message as a file (.ogg or .opus) and drop it here. Use 64 kbps mono; speech needs little.
Does the OGG go to a server?
It does not. The page downloads a conversion engine once and then does all the work locally, in the tab.
Why does the first conversion take a while to start?
The first time, the page downloads its 32 MB ffmpeg engine. Later conversions in the same session start immediately.