CaptionOS

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About CaptionOS

CaptionOS (captionos.in) is an online caption editor for short videos, made in India. It turns Hinglish, Hindi, Urdu and English speech into animated, word-timed captions that you can style, edit and export as an MP4 or a subtitle file. It runs in the browser on phones and computers.

Name
CaptionOS (one word: Caption + OS)
Website
captionos.in, the only official website. The editor opens at app.captionos.in.
What it is
An online caption editor for Instagram Reels, YouTube Shorts and other videos
Languages
Hinglish (Roman script), Hindi (Devanagari), Urdu (right to left), English
Works on
Any modern browser: Android, iPhone, iPad, Windows, Mac
Price
Free plan; paid plans from ₹49 a week. See pricing.
Made in
India
Launched
2026
Run by
Ankit Kumar, an individual based in India
Contact
support@captionos.in

What CaptionOS does

  1. Bring your video. Start a project and add an MP4, MOV or WebM. Vertical, square and widescreen all work.
  2. Transcribe it. Choose Hinglish, Hindi, Urdu or English. Every word comes back with its own start and end time.
  3. Style and refine. Pick one of 17 styles, then tune type, colour, effects, placement and motion. Fix any word in the transcript.
  4. Export. Render an MP4 with the captions burned in, or download subtitles as SRT, VTT, text or timestamped JSON.

Who it is for

Creators, editors and small teams who post short videos in Indian languages, especially people who speak a mix of Hindi and English and want their captions to read the way their audience types: Hinglish in Roman letters, or Hindi in Devanagari.

Every caption is timed to the word, and the look is yours to set: 17 designed styles, 13 typefaces, colours, outline, glow, placement and motion. The guides explain how to caption Reels in Hinglish and which script to choose.

Get in touch

Email support@captionos.in. Questions about privacy, payments and refunds are answered on the Privacy, Terms, Refunds and Contact pages.

Try it on your own video

Free plan, no card. Upload a video, pick a language and a style, and see your captions in a minute or two.

Start free