Convert OGG to AAC Online

"Online converter" normally means uploading your file to someone's server, waiting in a queue, and downloading the result. This page inverts that: it loads FFmpeg compiled to WebAssembly into your browser and does the work on your own machine. You keep the convenience of online — nothing to install, works on any OS — without the upload.

Expect a similar file size; the reason to convert is playback and workflow, not disk. That matters here, because transfer is where server-based converters spend most of their time. With no upload and no download of the result, what's left is just the conversion itself: usually a second or two.

OGG files typically come from game assets, Linux software, Audacity exports, and royalty-free sound libraries — and OGG plays in browsers and game engines but is refused by iPhones, most car stereos, and plenty of upload forms. OGG already discarded data; AAC will discard a little more. Pick 192–320 kbps and it won't be audible in normal listening.

Because it's a web page rather than software, the same converter runs on Windows, macOS, Linux, ChromeOS, iPhone, and Android — with nothing to keep updated and none of the bundled adware that comes with downloadable free converters.

OGG is the format of game assets. It plays where it was made, but OGG plays in browsers and game engines but is refused by iPhones, most car stereos, and plenty of upload forms. AAC is the destination because it plays essentially everywhere — HLS streaming segments and every ordinary phone, browser, and player. Expect a similar file size; the reason to convert is playback and workflow, not disk. Both OGG and AAC are lossy, so this pair stacks a second encode — at a generous bitrate it stays inaudible, but if a lossless original of the OGG exists, encode the AAC from that instead.