MP3 to OGG
Free online conversion of MP3 audio to OGG (Opus) format with better quality and smaller size at the same bitrate. Supports MP3, WAV, and FLAC input. Processed entirely in your browser — files are never uploaded to any server.
Privacy Protection
All conversions are done locally in the browser; MP3 files are never uploaded to any server, protecting your audio privacy
Efficient Compression
OGG Opus encoding delivers better audio quality and smaller file sizes than MP3 at the same bitrate, making it the ideal audio format for the web and games
Native Support
OGG is natively supported on Linux, Android, and game engines — no third-party decoders needed, with excellent compatibility
Drop MP3 file here
or
Supports MP3, WAV, and FLAC formats
3 Steps to Convert MP3 to OGG
Upload MP3 File
Click the upload area or drag and drop MP3, WAV, or FLAC audio files. Supports files up to 2 GB.
Select Quality
Choose the OGG output bitrate to suit your needs. 128 kbps high quality is the recommended option.
Convert and download
Click Convert, then download the OGG file once processing is complete. Everything runs in your browser — no account required.
Typical Use Cases for MP3 to OGG
Web Game Sound Effects
Web games use the HTML5 Audio API to play sound effects. OGG is natively supported in major browsers like Chrome and Firefox, offering fast loading and no decoding delay, making it the ideal audio format for web game sound effects.
Unity / Godot Game Development
The Unity engine supports importing OGG audio, and the Godot engine recommends OGG Vorbis for music and long audio. Converting your MP3 assets to OGG before importing into a game can reduce the game package size without sacrificing audio quality.
Linux System Use
Linux natively supports OGG with no extra codecs needed for playback. For Linux users, converting audio to OGG lets it open directly in the default system player, avoiding the copyright-related MP3 restrictions found in some distributions.
Website Audio Optimization
Using OGG for website background music and notification sounds reduces file size by 10–20% compared to MP3 at the same quality, resulting in faster loading and better web performance. You can use the source tag in HTML to serve both OGG and MP3, covering all browsers.
Differences Between MP3 and OGG
| Comparison | MP3 (lossy compression) | OGG Opus (Lossy Compression) |
|---|---|---|
| Audio Quality Efficiency | Older encoding algorithm with mediocre quality at low bitrates | Modern encoding with better quality at the same bitrate (approximately 10–15% better) |
| File Size | Equivalent quality at approximately 128–320 kbps | Equivalent quality at approximately 96–192 kbps, with 10–20% smaller file size |
| Browser Support | Supported in all browsers (including Safari) | Supported in Chrome, Firefox, and Edge; not supported in Safari |
| Game Engines | Supported in Unity and Unreal Engine | Supported in Unity, Godot, and LÖVE; the recommended format for Godot |
| Patents and Licensing | Historically had patent issues (now expired); commercial use should be verified | Fully open-source and free, no patent restrictions |
Supported input formats
- MP3 — the most common lossy compressed format, compatible with all devices
- WAV — lossless uncompressed format with the best audio quality; converting to OGG effectively reduces file size
- FLAC — lossless compressed format; converting to OGG can significantly reduce file size
Technical Notes
The VideoKit MP3 to OGG tool is based on the WebCodecs API. It decodes MP3/WAV/FLAC audio streams directly in the browser and encodes the result with the Opus encoder, packaged in the OGG container format. Opus is an IETF-standard codec supported natively by browsers — no WASM plugin required.
The entire process runs locally. No audio data is sent to any server. The output OGG files are compatible with Chrome, Firefox, Edge, Android, Linux, and all major game engines.
Frequently Asked Questions
Why Convert MP3 to OGG?
OGG offers better audio quality than MP3 at the same bitrate, with a smaller file size. Linux, Android, and web game development environments have better OGG support, making it the preferred format in those contexts.
Which sounds better — OGG or MP3?
OGG (Opus) delivers better audio quality at the same bitrate, but converting from MP3 does not restore lost audio information — the source file quality is still limited by the original MP3.
Will my files be uploaded to a server?
No. All processing happens locally in your browser. Audio files never leave your device — your privacy is fully protected.
Which devices support OGG?
Natively supported on Linux and Android. Supported in Chrome, Firefox, and Edge. Supported in Unity and Godot game engines. iOS/macOS do not natively support OGG.
Will the OGG file be smaller after conversion?
At lower bitrates, the OGG file will be smaller than the original MP3. A 128 kbps OGG is comparable in quality to a 160 kbps MP3, allowing you to reduce file size without a noticeable drop in quality.
OGG or MP3 for game development?
OGG is recommended for web games and Godot development. Unity supports both. When iOS compatibility is required, it is recommended to provide both OGG and MP3/AAC versions.
What is the maximum input file size?
Audio files up to 2 GB are supported as input. OGG output size is comparable to MP3, placing no memory pressure.
Which Input Formats Are Supported?
MP3, WAV, and FLAC are all supported as input and can each be converted to OGG in one click.