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SRT subtitle validator

Validates SRT or WebVTT subtitles for numbering, timecode syntax, overlaps, and encoding damage, then produces a repaired copy to download.

Paste a subtitle file and press Validate and repair.

The repair drops only what a player cannot read: cues with broken timecodes, empty cues, cues that end before they start. Everything else stays, with overlaps trimmed to the gap you set, SRT numbers run back to 1, 2, 3, and the milliseconds separator converted for the chosen format. What it does not do: spell checks, line-length or reading-speed checks (the sibling tools cover those), or frame-rate snapping. Encoding damage is read from the text you hand it, so pasted text cannot show byte faults the way a file open can; the browser already swapped invalid UTF-8 bytes for replacement characters on the way in.
OptionsValidate and repair

More video tools

- Subtitle line breaks (/videos/subtitle-line-break-formatter)
- Subtitle reading speed (/videos/subtitle-reading-speed-checker)
All video tools (/videos)

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