Convert AAC to OGG online

Your AAC file is converted to OGG right here in your browser, using FFmpeg compiled to WebAssembly. Nothing is uploaded to us, the audio never leaves your device. Quality is preserved and the download is ready in seconds.

What is an AAC file?

AAC (Advanced Audio Coding) is MP3's designed successor: at the same bitrate it preserves noticeably more detail, especially at the low bitrates where MP3 falls apart. It is the audio inside YouTube videos, M4A files and most streaming services.

AAC is everywhere modern media is: YouTube, iPhones, Android, streaming platforms. Raw .aac files are less common than AAC-inside-M4A, but they behave the same.

Why OGG?

OGG is an open, royalty-free container, most commonly carrying Vorbis-encoded audio. It was built as the free-software answer to MP3 and delivers comparable or better quality at the same bitrate.

Convert to OGG for game development, open-source projects, or platforms that specifically ask for it. It is technically excellent and free of patent baggage. The rare weak spot is legacy hardware: very old players and some embedded systems only understand MP3 or WAV.

Frequently asked questions

Will converting AAC to OGG lose quality?

A small, one-time generational loss is unavoidable. Both AAC and OGG are lossy, so re-encoding discards a little more detail. The converter uses high-quality settings to keep it inaudible for speech, but if you still have the original uncompressed source, converting from that instead is always better.

Is it free?

Yes, completely, with no account and no watermark. The conversion runs on your own device, so it costs us nothing to let you use it. The only limit is file size: up to 50 MB, which is what a browser can hold in memory comfortably.

Do I need to install anything, or upload my file?

Neither. It runs entirely in your browser using FFmpeg compiled to WebAssembly. Your audio is never sent to us, which is also why it works on a slow connection, only the page downloads, not your file.

Need a transcript of the audio?

Autrans also transcribes audio in Nigerian English, Pidgin, Yoruba, Hausa, Igbo, French, and Spanish.