Media
MP3 test files, any size.
Set a size and generate a structurally valid MP3 immediately. Nothing is uploaded and nothing is stored.
MP3, built to spec.
Each file is a stream of valid MPEG-1 Layer III frames at 128 kbps. The size you ask for is reached with an ID3v2 tag sized to absorb the remainder, so the result opens in media players, VLC and ffprobe. Most people generate these for testing audio ingestion and podcast upload forms.
Common sizes
Pick a size to jump straight to it, or set your own on the caliper above.
1 KB MP3
1,024 bytes
5 KB MP3
5,120 bytes
10 KB MP3
10,240 bytes
50 KB MP3
51,200 bytes
100 KB MP3
102,400 bytes
500 KB MP3
512,000 bytes
1 MB MP3
1,048,576 bytes
2 MB MP3
2,097,152 bytes
3 MB MP3
3,145,728 bytes
5 MB MP3
5,242,880 bytes
10 MB MP3
10,485,760 bytes
15 MB MP3
15,728,640 bytes
20 MB MP3
20,971,520 bytes
25 MB MP3
26,214,400 bytes
50 MB MP3
52,428,800 bytes
100 MB MP3
104,857,600 bytes
200 MB MP3
209,715,200 bytes
500 MB MP3
524,288,000 bytes
1 GB MP3
1,073,741,824 bytes
2 GB MP3
2,147,483,648 bytes
Questions.
How small can an MP3 file be?
About 427 bytes. Below that the format cannot carry its mandatory structure, let alone padding.
Will the file open normally?
Yes — it opens in media players, VLC and ffprobe, because the padding lives in an ID3v2 tag sized to absorb the remainder.
Can I ask for an unusual size?
Any byte count above the minimum works, including values like 3,145,728 or 27.5 MB. Drag the caliper or type the number.
Noticed an issue with this test file? Report an issue →