Caption-Lagao

Subtitles

Free automatic subtitle generator

Subtitles are the words that were spoken, timed to the video. This page is the free automatic path: generate them from audio, then either burn them into the MP4 or download SRT and VTT.

Generate captions freeTry a sample clip
  • Automatic speech-to-subtitles in the browser
  • SRT and VTT download
  • Optional burned-in MP4
  • Free, no watermark, no account

Sample: automatic subtitles on speech

Checking audio…

A preview of word-timed captions on a short clip — then you style and export.

Who this is for

For YouTube uploads that need a subtitle track, and for Reels or TikToks that need the same words burned into the picture so mute viewers can still read them.

The problem

“Add subtitles” tools often mean a paid desktop editor, a watermark, or a closed-caption file you cannot style. Platform auto-captions also vanish if someone saves the video.

How Caption-Lagao treats the speech

One generate pass writes word timestamps. Export a burned-in MP4 for social posts, and SRT or VTT for YouTube’s subtitle upload — from the same transcript, with no watermark.

Your file

The source file stays on this device. Audio is sent to transcribe. Files are not uploaded to YouTube or TikTok from this site.

How it works

  1. 1

    Drop the video

    MP4, MOV, or WEBM up to 200 MB. The video stays on this device.

  2. 2

    Generate subtitles

    Audio is transcribed with word timestamps. Choose Roman Urdu if the speech is Urdu.

  3. 3

    Correct the draft

    Fix leftover words. Split long sentences so they fit a 9:16 frame if you will burn them in.

  4. 4

    Export SRT or MP4

    Download SRT/VTT for a subtitle track, or a burned-in MP4 for mute autoplay.

Captions and subtitles start from the same transcript here. Burn-in is what TikTok and Reels actually show. SRT is what YouTube Studio accepts as a subtitle file.

Automatic is the first pass. Always read names, numbers, and mixed lines once — then export.

SRT, VTT, ASS, and TXT for subtitle tracks. Burned-in MP4 when the words must stay in the picture. Neither file is watermarked.

Questions

What is the difference between captions and subtitles here?

Same words, two files. Burned-in captions are pixels in the MP4. A subtitle file (SRT/VTT) is a separate track a player can toggle — the usual YouTube upload.

Can I automatically add subtitles to a video online for free?

Yes. Generate from the audio, edit if needed, then export. No account and no Caption-Lagao watermark.

Will SRT keep karaoke highlighting?

No. SRT carries text and times, not fill color. Use the burned-in MP4 if the look matters; use SRT for YouTube’s CC track.

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