5 KB MP3 sample
An MP3 file of exactly 5,120 bytes. It is a valid MPEG-1 Audio Layer III file, generated by this site. Compare its checksum and test it with the parser used by your application. Use it wherever you need a 5 KB sample, test or dummy MP3 file.
Download
sample-mp3-5kb.mp3
5 KB5,120 bytes
Download 5 KB MP3Created in your browser in a few seconds, then checked against the SHA-256 checksum. The file is not uploaded anywhere. No sign-up.
- Type
- audio/mpeg
- SHA-256
1f67f3e517bfab0e8cc762c2ac148b1e2513d31b6c9a0509f352db72e9a53681- Delivery
- Created in your browser from static generator assets (how it works).
What is in this file
11 MPEG audio frames (0.3 s) of a synthesised musical phrase that repeats every eight seconds, after an ID3v2.3 tag. 410 bytes of zeros in the tag's standard padding area bring the file to the exact size.
| Duration | 0.3 s |
|---|---|
| Bit rate | 128 kbit/s constant |
| Sample rate | 44,100 Hz |
| Channels | Stereo |
| Format | MPEG-1 Audio Layer III |
| Tags | ID3v2.3 (title, artist, album, genre) |
First bytes of the file
The first 64 bytes of sample-mp3-5kb.mp3 as a hex dump: offset, bytes, then the same bytes as text. The MP3 signature is 49 44 33.
00000000 49 44 33 03 00 00 00 00 04 01 54 49 54 32 00 00 |ID3.......TIT2..|
00000010 00 12 00 00 00 53 61 6d 70 6c 65 20 4d 50 33 20 |.....Sample MP3 |
00000020 28 35 20 4b 42 29 54 50 45 31 00 00 00 10 00 00 |(5 KB)TPE1......|
00000030 00 53 61 6d 70 6c 65 54 65 73 74 46 69 6c 65 73 |.SampleTestFiles|Preview
Creates the file in your browser and shows it here.
Where 5 KB matters
A 5,120-byte file: larger than a cookie, smaller than a typical HTTP header limit. These are the default limits a file of this size is useful for testing:
| System | Limit | Note |
|---|---|---|
| Browser cookies | 4,096 bytes per cookie | 5 KB does not fit in one cookie. |
| Vite asset inlining | 4 KB by default (assetsInlineLimit) | A 5 KB asset is emitted as a separate file rather than inlined as base64. |
| nginx and Apache request headers | 8 KB per header line by default | 5 KB fits; the 10 KB sample does not. |
Use this file for
- Checking email size handling
- Testing transcoding and podcast pipelines
- Testing audio upload and playback
Testing notes for MP3
- A large ID3 tag with artwork can push the first audio frame far into the file, confusing naive sniffers.
- Duration is not stored in a header. Players estimate it from bit rate and file size, which goes wrong for variable-bit-rate files that lack a Xing header.
Technical details
| File name | sample-mp3-5kb.mp3 |
|---|---|
| Format | MP3 (MPEG-1 Audio Layer III) |
| Extension | .mp3 |
| MIME type | audio/mpeg |
| Size | 5,120 bytes (5 KB) |
| Kind | Binary |
| Signature | 49 44 33 |
| SHA-256 | 1f67f3e517bfab0e8cc762c2ac148b1e2513d31b6c9a0509f352db72e9a53681 |
| Created | 2026-10-23 |
| Validation | See the listed size and SHA-256. Small downloads are checked in the browser; verify streamed downloads manually. A hash match does not prove parser compatibility. |
| Preview | Available on this page |
| Source | Generated in your browser by this site's generator; not copied from elsewhere |
| Licence | Free to use, modify and redistribute (terms) |
| Category | Audio |
Check the stated structure and checksum against your application requirements. As with any download, scan the file with your own security tools before opening it. How files are made and checked
Verify your copy
This file is created in your browser, so it has no direct URL for curl or wget. The generator is designed to produce reproducible bytes. After saving, compare the checksum with the SHA-256 value above.
sha256sum sample-mp3-5kb.mp3 # Linux
shasum -a 256 sample-mp3-5kb.mp3 # macOSOn Windows, run Get-FileHash sample-mp3-5kb.mp3 -Algorithm SHA256 in PowerShell. For scripts and pipelines, save the file once and keep your own copy.
Related files
Questions about this file
- Is this file exactly 5 KB?
- Yes. It is 5,120 bytes, which is 5 KB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
- What is inside the 5 KB MP3 file?
- 11 MPEG audio frames (0.3 s) of a synthesised musical phrase that repeats every eight seconds, after an ID3v2.3 tag. 410 bytes of zeros in the tag's standard padding area bring the file to the exact size.
- What is on the MP3 samples?
- A short synthesised musical phrase that repeats. It was generated by code for this site, so it is free of any music copyright.