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WebVTT Validator

Validate basic WebVTT cue timing and settings with explicit unsupported blocks.

webvtt-validatorLOCAL WORKSPACE

Enabling local controls…

Local only; no upload or input-URL fetch. Text32KiB; files8MiB each/32MiB total; images4MP each/16MP total; output canvas8MP.

Source and controls

Basic cue validation. STYLE,REGION,NOTE blocks are unsupported; overlap/order issues are warnings. Cue markup is not executed.

Results and preview

Edit or select files, then process. Input changes clear old output.

Source interface reviewed2026-10-19: ToolHub

How to use this tool

Edit the fields or explicitly choose local files, then process and review the actual preview and complete download. Input changes cancel pending work.

When not to use it

Local only; no upload, external URL fetch, camera or microphone. Text32KiB, files8MiB each/32MiB total, images4MP each/16MP total. Output and format-specific limits are stated in the tool; generated formats and visual models require review.