100 KB MP4 sample file
An MP4 file of exactly 102,400 bytes. It is a valid MPEG-4 Part 14 video file, generated for this site and checked with an independent parser.
Download
sample-mp4-100kb.mp4
100 KB102,400 bytes
Download 100 KB MP4Direct download. No sign-up and no waiting.
- Type
- video/mp4
- SHA-256
723bf1bdd891d77c137f5e0880987d13a1833ecef1c479f43cac1327dddc4a38- Direct URL
https://sampletestfiles.com/downloads/mp4/sample-mp4-100kb.mp4
What is in this file
57 frames (1.9 s) of a synthetic test pattern with a frame counter, looping every six seconds, in one H.264 video track. 783 bytes of a trailing "free" box bring the file to the exact size.
| Dimensions | 640 × 360 px |
|---|---|
| Duration | 1.9 s |
| Frame rate | 30 fps |
| Video codec | H.264 (AVC), Main profile |
| Audio | No audio track |
| Fast start | Yes (moov before mdat) |
First bytes of the file
The first 64 bytes of sample-mp4-100kb.mp4 as a hex dump: offset, bytes, then the same bytes as text. The MP4 signature is 66 74 79 70 at offset 4.
00000000 00 00 00 20 66 74 79 70 69 73 6f 6d 00 00 02 00 |... ftypisom....|
00000010 69 73 6f 6d 69 73 6f 32 61 76 63 31 6d 70 34 31 |isomiso2avc1mp41|
00000020 00 00 03 63 6d 6f 6f 76 00 00 00 6c 6d 76 68 64 |...cmoov...lmvhd|
00000030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 e8 |................|Preview
Displays the file in your browser.
Where 100 KB matters
A 102,400-byte file that sits exactly on the default request-body limit of Express. These are the default limits a file of this size is useful for testing:
| System | Limit | Note |
|---|---|---|
| Express body parsers | 100 KB (102,400 bytes) by default | A request body of exactly this size passes; anything larger returns 413 Payload Too Large. |
| Gmail message clipping | About 102 KB of HTML | Longer messages are truncated behind a "view entire message" link. |
| Amazon DynamoDB items | 400 KB per item | 100 KB fits; the 500 KB sample does not. |
Use this file for
- Checking email size handling
- Checking HTML video playback and seeking
- Testing range-request support on servers and CDNs
Testing notes for MP4
- Uploads are large and slow, so they expose timeout, retry and progress-reporting bugs that small files never reach.
- Seeking in a browser needs HTTP range requests. A server that ignores the Range header makes video appear to work until someone drags the progress bar.
Technical details
| File name | sample-mp4-100kb.mp4 |
|---|---|
| Format | MP4 (MPEG-4 Part 14 video) |
| Extension | .mp4 |
| MIME type | video/mp4 |
| Size | 102,400 bytes (100 KB) |
| Kind | Binary |
| Signature | 66 74 79 70 at offset 4 |
| SHA-256 | 723bf1bdd891d77c137f5e0880987d13a1833ecef1c479f43cac1327dddc4a38 |
| Created | 2026-10-10 |
| Validation | Exact size, signature bytes and structure checked when the file was generated |
| Preview | Available on this page |
| Source | Generated for this site; not copied from elsewhere |
| Licence | Free to use, modify and redistribute (terms) |
| Category | Video |
Validated for expected format and integrity. As with any download, scan the file with your own security tools before opening it. How files are made and checked
Download from the command line and verify
Fetch the file with curl, then compare its checksum with the SHA-256 value above.
curl -o sample-mp4-100kb.mp4 'https://sampletestfiles.com/downloads/mp4/sample-mp4-100kb.mp4'
sha256sum sample-mp4-100kb.mp4 # Linux
shasum -a 256 sample-mp4-100kb.mp4 # macOSOn Windows, run Get-FileHash sample-mp4-100kb.mp4 -Algorithm SHA256 in PowerShell. A matching value proves that the download is complete and unaltered.
Related files
Questions about this file
- Is this file exactly 100 KB?
- Yes. It is 102,400 bytes, which is 100 KB in the binary units that operating systems and server limits use (1 KB = 1,024 bytes).
- What is inside the 100 KB MP4 file?
- 57 frames (1.9 s) of a synthetic test pattern with a frame counter, looping every six seconds, in one H.264 video track. 783 bytes of a trailing "free" box bring the file to the exact size.
- Will they play in a browser before fully downloading?
- Yes. The index is at the start of the file, so playback can begin immediately.