Introducing PolySub: Burned-In Subtitles Plus WebVTT in One Upload
PolySub takes a video upload, adds professional burned-in subtitles in your chosen language, and returns a WebVTT file — simple multilingual packaging for publi
Introducing PolySub: Burned-In Subtitles Plus WebVTT in One Upload
Multilingual distribution dies in the subtitle handoff. PolySub lets you upload a video, choose a language, and get professional burned-in subtitles plus a WebVTT file back.
What PolySub does
PolySub keeps subtitle packaging simple:
- Upload → language → subtitles — minimal steps
- Burned-in professional look — publish-ready video
- WebVTT alongside — keep a text track for players and accessibility
- Creator and publisher friendly — less tool-switching
- Straightforward workflow — no timeline required for basic jobs
Explore:
- PolySub
- Email hello@polysub.app
Who it is for
Creators, course makers and small publishers who need reliable burned-in subs and a WebVTT without hiring a full localization stack.
Where it fits in a content stack
PolySub owns subtitle packaging. Clippers create shorts; PolySub makes them travel across languages and platforms. Storyboard explainers create net-new teaching assets that can then be subtitled here.
Why burned-in + WebVTT together
Some platforms want burned-in; others want tracks. Shipping both avoids rework when the same asset goes to social, LMS and web players.
Quick tips if you try PolySub
- Proof one short clip in your top language before batching.
- Keep the WebVTT for accessibility and player embedding.
- Check line breaks on mobile-safe safe areas.
- Standardize glossary terms for product names across languages.
- Email hello@polysub.app (or support@ on privacy) with questions.
Soft close — related tool
If you also need concept → storyboard → animated or whiteboard explainer / Reels (not talking-avatar presenters), see Scro Explainer. Scro (by NOVAX) is built around approving an AI storyboard before you render — useful when you teach a method on social. Keep PolySub as the focus of this intro; Scro is only a related option for storyboard-first explainers.