CapsAI

Timing quality check

Subtitle Sync Checker

Inspect the internal timing of an SRT track before publishing. The checker finds cue overlaps, end times that precede start times, and captions held onscreen for more than ten seconds.

Browser-basedFree to use

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Tool workspace

No account required · processed locally

Three steps

How this tool works

  1. 1

    Paste or open the SRT track.

  2. 2

    Run structural checks across adjacent cues.

  3. 3

    Use the issue list to repair the source file.

Useful for

Common workflows

  • Pre-publish caption QA
  • Vendor subtitle review
  • Diagnosing failed subtitle imports

What it checks

Focused, transparent output

  • Overlapping cues
  • Invalid cue duration
  • Long onscreen captions

Questions

Frequently asked questions

Does this compare captions with the video audio?

No. It checks timestamp structure inside the subtitle file, not speech alignment.

Is an overlap always wrong?

Most single-speaker subtitle workflows avoid overlaps, but intentional multi-position captions may use them.

Can the checker repair issues automatically?

It reports exact cue numbers so you can make intentional corrections without changing dialogue unexpectedly.

Continue your subtitle workflow

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