VTTAUDIT · PROFESSIONAL BROWSER TOOL
Look closer at WebVTT captions.
Upload or paste WebVTT to catch broken timestamps, empty cues, duplicate IDs, invalid settings, and accidental overlaps in your browser.
01 · WORKBENCH
Inputs and files stay on this device
Processed locally
/Focus first input⌘ ↵Run primary action⌘ ⇧ SDownload local reportAlt RJump to latest resultsAlt LSwitch languageAlt TSwitch themeAlt CToggle high contrast
Local report studioPreview · Markdown · JSON · SHA-256
SHA-256
—Uses only the currently visible result summary, never input controls or original files; the fingerprint is also calculated locally.
Local analysis checkpointsUp to 5 · saved only when you choose
Stores only the visible result summary, time, and an optional short label; imported files and input controls are never stored. Imports must match this tool and stay under 128KB; comparison also stays on this device.
02 · CAPABILITIES
Built deeply for one narrow workflow
Settings, IDs, and payload preflight
Timeline span and overlap ledger
This is a bounded preflight of common W3C WebVTT syntax, not a complete browser parser, CSS renderer, bidirectional-text engine, chapter-track semantic checker, or platform delivery profile. Caption overlaps can be valid depending on use.
Read the source ↗NO ACCOUNT · LOCAL PROCESSING · EXPORTABLE