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.

Does Whisper upload my audio to a server?

No. Whisper runs locally in your browser via WebAssembly. Your audio is processed on your device.

How accurate is the transcription?

Whisper produces professional-grade accuracy for most clear speech in English and many other languages. Accuracy is lower for heavy accents, background noise, or very fast speech.

Can I edit the captions?

Yes. Every word is editable in the caption editor. You can also adjust timing and split or merge caption groups.

What caption styles are available?

CalmClip includes several presets: bold pop (large centered text), subtitle style (lower third), and others.

Does captioning require Pro?

Yes. AI transcription and caption burning are Pro features.

Will captions slow down the export?

The export is processed locally using FFmpeg. Speed depends on your CPU and the length of the video, not a server queue.

Add Captions to Video Free | Local AI Transcription

Add Captions to Video AutomaticallyUse local AI to transcribe and caption your videos directly in your browser. Generate highly accurate subtitles and add captions to video automatically using local AI. Whisper runs natively in your browser. Zero uploads.

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