100 KB VTT sample file
A VTT file of exactly 102,400 bytes. It is a valid WebVTT subtitles file, generated for this site and checked with an independent parser.
Download
sample-vtt-100kb.vtt
100 KB102,400 bytes
Download 100 KB VTTDirect download. No sign-up and no waiting.
- Type
- text/vtt
- SHA-256
5887f8b8b86e8183e8481f760f63ef90ae554a6e1d70a7108c44a29eb0573c27- Direct URL
https://sampletestfiles.com/downloads/vtt/sample-vtt-100kb.vtt
What is in this file
The WEBVTT header and 880 cues with identifiers. A closing NOTE comment block brings the file to the exact size.
| Cues | 880 |
|---|---|
| Cue length | 3 seconds, one every 4 seconds |
| Running time | 00:58:40 |
| Encoding | UTF-8 (ASCII characters only) |
| Line endings | LF |
How the file begins
The opening lines of sample-vtt-100kb.vtt, exactly as they appear in the file.
WEBVTT
NOTE SampleTestFiles sample WebVTT file (100 KB)
1
00:00:00.000 --> 00:00:03.000
This sample file exists so that software
can be tested with realistic input.
2
00:00:04.000 --> 00:00:07.000
Every line in this document was generated
by a script and describes nothing
confidential.Preview
Shows the first 64 KB of the file.
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
- Testing accessibility of video players
- Testing HTML video captions
Testing notes for VTT
- Servers that send WebVTT as text/plain may see tracks ignored; the correct type is text/vtt.
- Browsers load caption tracks under the same cross-origin rules as scripts, so a .vtt file on another domain needs CORS headers.
Technical details
| File name | sample-vtt-100kb.vtt |
|---|---|
| Format | VTT (WebVTT subtitles) |
| Extension | .vtt |
| MIME type | text/vtt |
| Size | 102,400 bytes (100 KB) |
| Kind | Text |
| Signature | 57 45 42 56 54 54 |
| SHA-256 | 5887f8b8b86e8183e8481f760f63ef90ae554a6e1d70a7108c44a29eb0573c27 |
| 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 | Subtitles |
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-vtt-100kb.vtt 'https://sampletestfiles.com/downloads/vtt/sample-vtt-100kb.vtt'
sha256sum sample-vtt-100kb.vtt # Linux
shasum -a 256 sample-vtt-100kb.vtt # macOSOn Windows, run Get-FileHash sample-vtt-100kb.vtt -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 VTT file?
- The WEBVTT header and 880 cues with identifiers. A closing NOTE comment block brings the file to the exact size.
- Can I use these with the MP4 samples?
- Yes. Add the file with a <track> element to check that captions appear, though the text is unrelated to the picture.