viral caption generator

Generate viral captions for short videos

TikTok and Reels-style templates with highlighted words. Use SubtitleRocket to turn spoken words into bold captions with timed highlights in a browser editor. Review each caption line, try a visual template, and export captions with highlighted words in the selected template. You can download a watermarked result for free before choosing Pro or Max.

Open the editorBrowse tools

Drop a video here

MP4, MOV, or WebM · up to 15 min free

Your video stays in the browser. Only the extracted audio is sent for transcription.

Free: 720p MP4 with a small watermark, 90 transcription minutes/month, no signup to start. Pro from $7/month: clean 1080p, SRT/VTT export. Your video file never leaves the browser - only the extracted audio is sent for transcription.

Best for
  • short opening hooks
  • creator edits
  • comparing visual caption styles
Not built for
  • guaranteeing virality
  • writing social post captions from scratch
How it works
Inputs: MP4 video, MOV video, WebM video, spoken audio inside the uploaded clip.
Outputs: captions with highlighted words in the selected template, editable caption segments, free 720p watermarked download, 1080p clean export with a membership.
  1. Upload an MP4, MOV, or WebM file. The editor opens without forcing an account first.
  2. Use SubtitleRocket to turn spoken words into bold captions with timed highlights, then review the generated caption lines.
  3. Adjust wording, timing, and visual style before exporting.
  4. Download captions with highlighted words in the selected template. Free exports include a small watermark; clean exports need a membership.
What you get
Concrete inputs, outputs, and export limits for this workflow.
AreaDetails
InputMP4 video, MOV video, WebM video, spoken audio inside the uploaded clip
Editable resultGenerated caption segments that can be corrected before export
Free export720p captioned MP4 with a small watermark
Clean export1080p no-watermark MP4 with a Pro or Max membership
Best format fitcaptions with highlighted words in the selected template

FAQ

You can open the editor, generate captions, edit text, preview styles, and export with a watermark for free. A clean no-watermark 1080p export needs a Pro or Max membership.

No. You can start in the editor first. Sign in with a one-time email code when you want a membership, account recovery, or a clean export.

SubtitleRocket is built for MP4, MOV, and WebM short clips up to 15 minutes. The workflow is tuned for TikTok, Reels, Shorts, podcast clips, and talking-head videos.

Yes. Generated caption lines are editable, and you can switch visual templates before downloading the final video.

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