SRT Validator

Before you ship subtitles, check them. The SRT Validator scans a file for the mistakes that break players.

It reports errors (malformed timestamps, reversed or overlapping cues, numbering mismatches) and warnings (empty text, large gaps) with the cue number and a clear message. The file is not changed — this is a read-only check so you know exactly what to fix. Paste your SRT and validate.

• Error scan: malformed, reversed, overlapping cues.
• Warning scan: empty text, big gaps.
• Numbering check: flags mismatches.
• Read-only: never modifies your file.
• Clear report: cue-numbered messages.
• Private: runs in your browser.

1. Paste your SRT (sample with issues preloaded).
2. Click Validate SRT to see the report.
3. Fix flagged items with the cleaner or editor.

Example 1 — Pre-publish. Catch a reversed timestamp before upload.

Example 2 — QA. Verify a translated file numbers correctly.

Example 3 — Merge check. Ensure merged cues do not overlap.

• Safe: read-only check.
• Actionable: cue-numbered issues.
• Fast: instant report.
• Educational: learn common pitfalls.
• Private: nothing uploaded.