What does the WebVTT repair tool preserve?
It preserves cue identifiers, cue settings, the WebVTT header, and NOTE/STYLE/REGION blocks before, between, and after cues.
WebVTT repair tool
Validate and rebuild WebVTT captions before upload. Paste a VTT file, check the parsed structure, preserve WebVTT-specific metadata, and download a clean rebuilt file.
Paste WebVTT captions
Files are processed locally in your browser.
Repaired WebVTT
How to use this subtitle tool
- 1Paste a WebVTT file or upload a .vtt file from your device.
- 2Run the repair tool to parse cues, cue identifiers, cue settings, and header blocks.
- 3Review the validation report, then copy or download the rebuilt WebVTT file.
FAQ
Will this fix every broken VTT file?
It rebuilds recognized cues and reports invalid syntax, out-of-range timestamps, and reversed timing. Cue text is retained without guessing timestamps. Unrecognizable blocks stop the repair instead of being silently skipped.
Related subtitle tools
Why repair WebVTT captions?
WebVTT is more expressive than SRT, but that also means more ways for a file to break during export, editing, translation, or platform handoff. A repair pass catches issues before upload.
Preserve WebVTT-specific metadata
WebVTT captions can include cue identifiers, cue positioning settings, NOTE blocks, STYLE blocks, and REGION definitions. A normal subtitle converter may drop those details. This repair tool rebuilds VTT output while preserving the supported WebVTT structure.
Find common upload blockers
Video platforms and HTML5 players often reject files with malformed timing lines, missing headers, or broken cue order. The validation report highlights the parsed cue count and invalid timing lines so you can catch problems before delivery.
Local browser-based validation
Caption drafts often contain unreleased course content, client work, or internal media text. This page repairs and validates the file locally in the browser, so the text does not need to leave your device.