100 KB MKV sample file
An MKV file of exactly 102,400 bytes. It is a valid Matroska video file, generated for this site and checked with an independent parser. Use it wherever you need a 100 KB sample, test or dummy MKV file.
Download
sample-mkv-100kb.mkv
100 KB102,400 bytes
Download 100 KB MKVDirect download. No sign-up and no waiting.
- Type
- video/x-matroska
- SHA-256
6bfb4e0637928f212a6bce2486034b7970620d74229f57e861a15a3b271ad57f- Direct URL
https://www.sampletestfiles.com/downloads/mkv/sample-mkv-100kb.mkv
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 (AVC) video track. The index of key frames comes before the picture data, so a player can seek without reading the whole file. 993 bytes of an EBML Void element 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 |
| Document type | matroska |
| Clusters | 2, one for each key frame |
| Seek index | Cues element before the first cluster |
First bytes of the file
The first 64 bytes of sample-mkv-100kb.mkv as a hex dump: offset, bytes, then the same bytes as text. The MKV signature is 1A 45 DF A3.
00000000 1a 45 df a3 a3 42 86 81 01 42 f7 81 01 42 f2 81 |.E...B...B...B..|
00000010 04 42 f3 81 08 42 82 88 6d 61 74 72 6f 73 6b 61 |.B...B..matroska|
00000020 42 87 81 04 42 85 81 02 18 53 80 67 01 00 00 00 |B...B....S.g....|
00000030 00 01 8f cc 15 49 a9 66 cc 2a d7 b1 83 0f 42 40 |.....I.f.*....B@|Preview
MKV files cannot be shown in a browser. Download the file and open it in an application that reads MKV, such as VLC and mpv.
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 transcoding and remuxing pipelines
- Verifying type detection between MKV and WebM
Testing notes for MKV
- A file with no Cues element still plays but cannot seek quickly. Recordings that were interrupted, and live captures, are often like this.
- MKV and WebM share a signature. Detection has to read the document type inside the EBML header: "matroska" or "webm".
Technical details
| File name | sample-mkv-100kb.mkv |
|---|---|
| Format | MKV (Matroska video) |
| Extension | .mkv |
| MIME type | video/x-matroska |
| Size | 102,400 bytes (100 KB) |
| Kind | Binary |
| Signature | 1A 45 DF A3 |
| SHA-256 | 6bfb4e0637928f212a6bce2486034b7970620d74229f57e861a15a3b271ad57f |
| Created | 2026-10-10 |
| Validation | Exact size, signature bytes and structure checked when the file was generated |
| Preview | Not available for this file; details only |
| 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-mkv-100kb.mkv 'https://www.sampletestfiles.com/downloads/mkv/sample-mkv-100kb.mkv'
sha256sum sample-mkv-100kb.mkv # Linux
shasum -a 256 sample-mkv-100kb.mkv # macOSOn Windows, run Get-FileHash sample-mkv-100kb.mkv -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 MKV file?
- 57 frames (1.9 s) of a synthetic test pattern with a frame counter, looping every six seconds, in one H.264 (AVC) video track. The index of key frames comes before the picture data, so a player can seek without reading the whole file. 993 bytes of an EBML Void element bring the file to the exact size.
- Which media type should a server send for MKV?
- Most software uses video/x-matroska. RFC 9559 registered video/matroska in 2024, and an allow-list should accept both.