Step 1: Drop your AAC files using the button above or by deposit and leave.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Receive your converted OGG files.
AAC to OGG Conversion FAQ
What bitrate does the OGG file use?
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A lossy OGG is encoded at 192 kbps by default. The Audio Quality setting also offers 320 kbps for the best quality and 128 kbps for a smaller file. A lossless OGG (WAV, FLAC) ignores the bitrate and keeps every sample.
Is converting AAC to OGG a second round of lossy compression?
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Yes, and it is worth planning around. Both formats are lossy, so the OGG encoder is working from audio that has already been through one psychoacoustic pass, and its own decisions compound the first set. At 192 kbps or above the result is still transparent for most listening. If you have a lossless master anywhere, encoding the OGG from that instead avoids the double pass entirely. AAC is lossy but more efficient than MP3, and it handles up to 48 channels natively rather than being bolted onto a stereo design. Vorbis inside OGG is lossy and uses variable bitrate by default, so quality is set as a level rather than a fixed kbps figure.
Will the OGG play in my car or on older hardware?
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Often not. AAC is decoded by essentially everything, including car head units and elderly players; OGG needs software that knows the codec, which standalone hardware frequently does not have. If the destination is a car stereo or a portable player, that is a strong argument for staying on AAC. OGG has poor hardware support — car stereos, older iPods and many TVs will not see the file at all.
Will going from AAC to OGG reduce my audio quality?
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If AAC is lossy and OGG is lossless (e.g. MP3 → WAV), the OGG file is no better than the AAC — you can't recover information that's already been thrown away. If AAC is lossless and OGG is lossy, expect the OGG codec to recompress; at 192 kbps this is transparent for most content.
Can I batch convert hundreds of AAC files to OGG?
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Several files in one job need a paid plan. Free use is one file per conversion, one conversion an hour. On a paid plan you can add several files to one job, then download each result on its own or all of them in one ZIP.
Will the OGG keep the same sample rate as AAC?
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By default yes (48 kHz AAC → 48 kHz OGG). If you need to downsample for compatibility (e.g. 96 kHz → 44.1 kHz for CD burning) the advanced sample-rate option does this with high-quality resampling.
Can I normalize loudness in the AAC to OGG step?
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Not in this step. The converter has no loudness setting and leaves the level as it is. To even out the volume, run the finished OGG through a Normalize tool on this site.
Will the OGG play on my car stereo / iPod / audiobook app?
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MP3 plays almost everywhere. AAC plays on Apple devices, most Android phones and Sonos. FLAC plays on Sonos and Android but not on older iPods, and WAV plays on nearly everything but makes large files. There are no device presets on this page, so choose the target format your player supports.
Is my AAC file private during conversion?
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Yes. Nobody listens to or shares the audio, which matters for personal audiobook libraries, and uploaded AAC files and their converted copies are deleted automatically about 24 hours after conversion.
How long does converting a 10-hour audiobook AAC to OGG take?
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It depends on the size and length of the file. Small documents and images are usually ready quickly. Long videos take the longest, because most video conversions re-encode every frame.
