Caption generator
YouTube Caption Generator
Long YouTube videos are watched differently from Shorts: people skim chapters, scrub to a step and watch on a laptop with the sound low. This generator captions tutorials, interviews and explainers in the language spoken, lets you fix technical terms and names, and exports a landscape MP4 with the captions burned in. Uploads run up to 10 minutes each, so longer videos are captioned in parts.
Start with 3 free minutes. Free exports may include a CapsAI watermark.
Upload Video
For best results, upload a video with clear speech. You can review and edit the captions after generation.
Drag and drop video or
Accepted formats: MP4 and MOV, with a 9:16, 16:9 & 1:1 aspect ratio supported only.
English subtitle example: This is a preview of the subtitle design Please transcribe to get your video
What the captions look like
Tutorial step
Open Settings, then Privacy, then Camera permissions.
Captions on a screen recording should sit low, but above the taskbar or menu the viewer is following.
Interview exchange
When did it click? About six months in.
A new caption on every speaker change keeps a two-person interview readable.
Technical term
We run everything on Kubernetes with a Postgres backend.
Product and protocol names are what the first draft is most likely to misspell; fix them once and search the rest.
Hindi explainer
इस वीडियो में हम म्यूचुअल फंड के बारे में बात करेंगे।
Devanagari captions for a channel that teaches in Hindi.
What you get
- Captions in the language spoken, including Hindi, Hinglish and Tamil for Indian channels
- An editor built for proofreading dense, technical speech
- Readable full-line styles for long viewing sessions
- Burned-in captions that show even when viewers never open the CC menu
- Minutes bought once, without a subscription
Where it helps
- Software tutorials and screen recordings
- Podcast and interview episodes with two or more speakers
- Finance, exam and coaching explainers in Hindi or Hinglish
- Recorded lectures and course modules
How it works
How it works
Step 1
Split the video at chapter breaks
Each upload can be up to 10 minutes long. For a longer video, export one file per chapter or section so each part captions cleanly and lines up with your chapter markers.
Step 2
Upload the first part and pick the language
Choose the language the video is spoken in: English, Hindi, Hinglish or one of eight other Indian languages. Captions are not translated.
Step 3
Correct terms, names and numbers
Tutorials and interviews are dense with product names, acronyms and figures. Read the draft through, fix what the model misheard, and split long sentences into two lines.
Step 4
Place the captions for a landscape frame
Keep them in the lower third, clear of any on-screen text, code or slides the viewer needs to read. A calm full-line style suits a long watch better than word-by-word.
Step 5
Export each part and rejoin
Export the captioned MP4 for each part, join the parts in your video editor and upload the result to YouTube.
Choose your spoken language
What to do next
Related tools
Questions
Should I burn captions in or upload a subtitle track in YouTube Studio?
A subtitle track in YouTube Studio can be switched on and off and is read by YouTube as text, but it needs a caption file. Burned-in captions are always visible, in your style, and travel with the video wherever it is shared. CapsAI produces the burned-in version; separate caption files are not exported yet.
Can I export an SRT file for YouTube Studio?
The export is an MP4 with the captions burned in. Separate SRT or VTT files are not available from the editor yet; the standalone converters under /tools work on subtitle files you already have.
My video is 45 minutes long. Can I caption it?
Yes, in parts. Each upload is limited to 10 minutes, so split the video at chapter breaks, caption each part and join the exports in your editor. Minutes are deducted per part from your free allowance or minute pack.
Will the captions improve my YouTube search ranking?
Burned-in captions are pixels, not text, so YouTube does not read them. They help the people watching. For search, write a clear title and description and consider YouTube's own caption track as well.
Can I caption a video that is already on YouTube?
Upload the original file. CapsAI does not import from a YouTube link, and the exported, captioned MP4 would go up as a new video.
Which caption style works for a long video?
Full lines with a karaoke highlight, or a plain style. Word-by-word captions draw attention to each word, which tires viewers over a long watch.
Two kinds of YouTube captions
YouTube supports closed captions as a separate track that viewers toggle with the CC button, and burned-in open captions that are part of the picture. A caption track needs an SRT or similar file; burned-in captions need only the video. CapsAI gives you the second kind, with full control over wording and style before the video goes up.
Captioning in parts
Working chapter by chapter has a side benefit: each part is reviewed while the topic is fresh, and the caption style is applied once per section. Export each part as a captioned MP4, then join them in your editor and upload the full video.
Watch on a laptop, read on a phone
A long video may be played on a laptop at a desk or on a phone on a train. Keep captions at a size that reads on both: two lines at most, a clean font, and a lower-third placement that does not hide code, slides or on-screen text.
Learn more