Tutti gli strumenti

Add Captions to Video

Auto-transcribe and burn subtitles into a video with Whisper — in your browser, nothing uploaded.

Seleziona un file audio o video

MP3, WAV, M4A, MP4, MOV, WebM — trascritto nel tuo browser con Whisper

Fai clic per scegliere o trascina qui un file

Come Add Captions to Video

  1. 1

    Add your video

    Drop in an MP4, MOV or WebM with an audio track — it's read in your browser, never uploaded.

  2. 2

    Transcribe and review

    Whisper transcribes the speech into timed caption lines. Fix any mistakes right in the list before you burn them in — corrections after that point mean starting over.

  3. 3

    Style and export

    Pick a position and size, then download SRT/VTT subtitle files, or burn the captions directly into the video as a new file.

Related PDF tools

Add Captions to Video — domande frequenti

Is my video uploaded?+

No. Both the Whisper transcription and the caption burn-in run entirely in your browser. The video never leaves your device.

Which browsers work?+

Transcription works broadly. Burning captions into the video needs WebCodecs — Chrome, Edge or Safari 17+. You can still download SRT/VTT subtitle files anywhere transcription works.

Can I fix mistakes before burning them in?+

Yes — every caption line is editable after transcription. Fix anything Whisper got wrong before you burn it in, since that step is permanent.

Does burning in captions reduce video quality?+

Slightly — it's a full re-encode of the video, the same trade-off as Compress Video. Pick a lower resolution source if file size matters more than quality.

Caricate i miei file su un server?+

No — ogni strumento qui elabora i tuoi file interamente sul tuo dispositivo, e non viene caricato nulla su un server. L'unica eccezione sono gli strumenti IA, che inviano il testo estratto (non il file) a Claude per svolgere il loro lavoro.

C'è un limite di dimensione del file?+

Non imponiamo alcun limite artificiale, ma poiché l'elaborazione avviene nel tuo browser, i file molto grandi (oltre 500 MB o 1.000 pagine) sono limitati dalla memoria del tuo dispositivo, non da noi.