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Add Captions to Video

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

Välj en ljud- eller videofil

MP3, WAV, M4A, MP4, MOV, WebM — transkriberade i din webbläsare med Whisper

Klicka för att välja, eller släpp en fil här

Så här 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 Text to VideonewBurn custom titles or captions onto a video at a chosen time — in your browser.Video till textTranskribera talet i en video till text och undertexter (SRT/VTT) med Whisper — i din webbläsare, inget laddas upp.Ljud till textTranskribera en MP3, WAV eller röstmemo till text och undertexter med Whisper — i din webbläsare, inget laddas upp.Klipp videoKlipp en video till precis den del du vill ha, i din webbläsare.

Add Captions to Video — vanliga frågor

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.

Laddar ni upp mina filer till en server?+

Nej — alla verktyg här bearbetar dina filer helt på din enhet, och inget laddas upp till en server. Det enda undantaget är AI-verktygen, som skickar den extraherade texten (inte filen) till Claude för att göra sitt jobb.

Finns det en filstorleksgräns?+

Vi sätter ingen konstgjord gräns, men eftersom bearbetningen sker i din webbläsare begränsas mycket stora filer (500+ MB eller 1 000+ sidor) av din enhets minne, inte av oss.