Test files › Subtitles and captions › missing-signature.vtt
Sample WebVTT file (missing signature)
A WebVTT file with correct cues but no "WEBVTT" first line, which makes the whole file invalid.
↓ Download missing-signature.vtt| Filename | missing-signature.vtt |
| Format | WebVTT |
| Size | 138 bytes (138 bytes) |
| MIME type | text/vtt; charset=utf-8 |
| SHA-256 | 50cf66ef41bf05706e150236a4c48c25a65fc23b54c06cfba0c9143abe57b3f2 |
What this file catchesPlayers that parse cues without checking the signature. The spec requires the file to start with WEBVTT, so a conforming player rejects this outright while a lenient one silently plays it. Tells you which of the two you have built.
Download & verify
curl -fsSL -o "missing-signature.vtt" "https://files.hexaqa.com/subtitle/missing-signature.vtt"
curl -fsSL "https://files.hexaqa.com/subtitle/missing-signature.vtt" | sha256sum
# expect: 50cf66ef41bf05706e150236a4c48c25a65fc23b54c06cfba0c9143abe57b3f2