Does CalmClip upload my video to a server?

No. CalmClip processes everything entirely inside your browser using WebAssembly. Zero bytes of your video are ever sent to any server. Your files stay on your device at all times.

Is CalmClip free to use?

Yes. CalmClip is completely free. No account, no subscription, no hidden fees. Open the site and start editing immediately.

What video formats does CalmClip support?

CalmClip supports MP4, MOV, WebM, and MKV files. All editing and export happen locally in your browser using FFmpeg compiled to WebAssembly.

How does AI transcription work without uploading my video?

CalmClip runs the Whisper speech recognition model locally in your browser via WebAssembly. The AI model downloads once and runs entirely on your device, so your audio never leaves your machine.

Can CalmClip handle large video files?

Yes. Because CalmClip processes files locally using FFmpeg compiled to WebAssembly, it handles large files (1 GB and above) without upload delays. Editing starts immediately after you select the file.

Does CalmClip require an account or login?

No. CalmClip requires no account, no login, and no registration. Open the site, drop your video, and start editing.

What is the maximum length for YouTube Shorts?

YouTube Shorts must be under 3 minutes. Videos under 60 seconds are shown first in the Shorts feed. Use the CalmClip trim tool to cut your clip to the right length.

What aspect ratio do YouTube Shorts need?

9:16 vertical. This is the same ratio as TikTok and Instagram Reels.

Is cropping for Shorts free?

Yes. The 9:16 crop and single-format export are free features.

Can I add captions to my Short?

Yes. Add captions in the Captions section before exporting. They are burned into the final 9:16 video.

What video format should I upload to YouTube Shorts?

YouTube Shorts accepts MP4, MOV, and AVI. CalmClip exports MP4 by default, which is the recommended format.

Can I trim and crop in the same export?

Yes. Set your trim points and select 9:16 before exporting. Both apply in a single FFmpeg pass.

Crop Video for YouTube Shorts | 9:16 Format

Crop Video for YouTube ShortsConvert landscape footage to 9:16 and trim to Shorts length in one session. Convert your landscape YouTube video to 9:16 for YouTube Shorts. Free browser tool, no upload, no watermark. Trim to under 3 minutes in the same session.

Trim and cut video clips

AI captions and transcription (local, no upload)

Remove silence and filler words

Face blur (local processing)

Resize to any aspect ratio

Loudness normalization

Metadata stripping

Free, no install, no account