MP3 File Generator
An MP3 audio file of an exact size.
What to create
Settings
Files
The file consists of real audio frames: 128 kilobits per second at 44.1 kHz. Players recognize it as MP3 and show the duration.
How the exact size is reached
A frame in this format takes 417 bytes, so frames alone cannot hit any size. The remainder is filled by a tag at the start of the file: its length is arbitrary, and players skip it. Regular encoders do the same when they write a title and cover art into a file.
Such a file is useful for testing the size limit on audio attachments: in email, in messengers, and in call recording systems.
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