Subtitle Workbench — SRT and VTT converter — OnePassApps
Convert existing SRT and WebVTT files, shift or repair timings, validate cues and export subtitle batches locally. Does not transcribe audio.
Subtitle Workbench edits the timing and format of subtitles you already have. Paste text or select SRT and WebVTT files, review cue validation, and choose which timing changes to apply. Everything stays in browser memory. The app does not transcribe recordings, translate dialogue or process the accompanying video or audio.
What you can do
- Convert supported SRT and WebVTT cue text, with validation that exposes unsupported formatting instead of silently discarding it.
- Shift timings forward or backward and explicitly choose sorting, negative-time, duration or overlap repairs.
- Export one validated subtitle file, collect the batch in a ZIP, or download an imported original unchanged.
Limitations
- Imports allow up to 20 files and 5 MB per file. Rich WebVTT metadata and unsupported markup can block conversion; original downloads remain available.
- Converting positioning-bearing WebVTT to SRT is refused when it would lose information. Leaving or reloading clears the session, so export the files you need first.
Is Subtitle Workbench free, and do I need an account?
Yes, it is free. Subtitle Workbench runs in your browser with no account or payment details, and it never uses OnePassApps credits.
Read the How to convert SRT and VTT and adjust subtitle timing guide
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