mp4 subtitle generator

Generate subtitles for MP4, MOV, and WebM videos

Drop in an MP4, MOV, or WebM file and edit the generated captions before export. Use SubtitleRocket to caption MP4, MOV, or WebM files without converting them first in a browser editor. Review each caption line, try a visual template, and export a captioned MP4 preview or clean export. 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
  • phone videos and iPhone MOV clips
  • screen recordings exported as MP4 or WebM
  • creator clips
  • browser demos
Not built for
  • uncommon professional codecs
  • very large raw footage
How it works
Inputs: MP4 video, MOV video, WebM video, spoken audio inside the uploaded clip.
Outputs: a captioned MP4 preview or clean export, 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 caption MP4, MOV, or WebM files without converting them first, then review the generated caption lines.
  3. Adjust wording, timing, and visual style before exporting.
  4. Download a captioned MP4 preview or clean export. 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 fita captioned MP4 preview or clean export

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.

Yes. MOV files from the iPhone camera upload directly, no conversion step. The export is a social-ready MP4.

Yes. Browser-recorded WebM files (screen captures, product demos) are supported as input, and the captioned result exports as MP4.

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