What does the validator check?

It checks timestamp syntax, cue duration, empty text, chronological order, and overlaps.

Are overlaps always wrong?

Not always. They can be intentional for multiple speakers or positioned subtitles, so they are warnings.

No. The validator only reads and reports.

Validate subtitle structure before translation, publishing, or playback. The tool reports errors and warnings without uploading the file.

Local processing — your file is not sent to a server

Choose a subtitle file

The file stays in your browser.

Subtitle content

What does the validator check?: It checks timestamp syntax, cue duration, empty text, chronological order, and overlaps.
Are overlaps always wrong?: Not always. They can be intentional for multiple speakers or positioned subtitles, so they are warnings.
Does validation change the file?: No. The validator only reads and reports.