Convert MP4 to AAC

MP4 → AAC. Source file ≤ 2 GB · Output ≤ 100 MB · audio stream #1 → audio · video → ∅.

MP4 is a video container, not a codec. Its actual video and audio codecs depend on the file. Raw AAC may report an estimated duration; M4A provides a timed container. Only the first audio track is extracted; the source must contain audio. Video input is limited to 2 GB; audio output to 100 MB.

MP4 → AAC: Example settings

60 s × 192 kbps ÷ 8 ≈ 1.44 MB • AAC

AAC: Output

Sizes are examples, not guarantees. Container overhead is extra; variable bitrate and image content change the result. Keep the original and compare the output.

JavaScript is required for file selection and processing.