Add subtitles to a video

Burn subtitles into the picture from an SRT file or a pasted script.

Free · No sign-up · No login · No install · No watermark

How it works

  1. Choose a videoMP4, MOV or WebM from your phone or computer.
  2. Add subtitlesPaste your script, or upload an SRT / VTT subtitle file.
  3. Burn and downloadCheck the timing and preview, pick a style, then burn and download the MP4.

Loads a 5-second sample clip and a sample script from this site, so you can try every step without your own video.

What is an SRT file?

An SRT file is a plain-text subtitle file. Each subtitle has a number, a start and end time (hours:minutes:seconds,milliseconds) and the text, separated by an empty line. Most video editors and video platforms can export it.

Example:

1
00:00:01,000 --> 00:00:03,500
Hello, and welcome!

VTT (WebVTT) is almost the same: it starts with a line “WEBVTT” and uses a dot instead of the comma in times. Both work here.

⬇ Download a sample .srt

How should I write the script?

Write what is said, one sentence per line, and end each sentence with a full stop. Long sentences are split at commas or between words, and the lines are spread over the parts of the video where there is sound.

You paste:

Hi everyone, and welcome back.
Today I will show you how to put subtitles on a video in three easy steps.
Thanks for watching!

It becomes (on a 10-second video with speech all the way through):

  1. 0:00.0–0:02.4 Hi everyone, and welcome back.
  2. 0:02.4–0:04.9 Today I will show you how to put
  3. 0:04.9–0:08.3 subtitles on a video in three easy steps.
  4. 0:08.3–0:10.0 Thanks for watching!

🔒 Files never leave your device — processing happens in your browser.

Only process videos you own or have permission to use.

How to use

  1. Choose a video.
  2. Paste a script or upload an SRT/VTT file, then check and adjust the timing on the timeline or in the subtitle list.
  3. Change the style and position of one subtitle or all of them, then press Burn subtitles and download the MP4.

Add subtitles to a video

Burned-in subtitles are part of the picture, so they show on every app — useful for Shorts and silent autoplay. Auto timing splits the script into short lines and spreads them by length over the parts of the video that have sound (found by volume); it is a draft, not speech recognition. On the timeline (with a sound waveform) you can drag each line to move it or change its length; in the subtitle list you can edit the text and times; each line can have its own font, size, colours, outline, background and position (drag it on the video). There is one subtitle track and no animations or effects. Download the result as MP4, the subtitles as .srt, or a project backup that keeps the styles. Fonts for Chinese, Japanese, Korean, Thai, Vietnamese and English are included.

Subtitles sit inside a safe area away from the edges, where app buttons usually are.

Frequently asked questions

Is the auto timing accurate?

Only roughly. The lines are spread by text length over the parts of the video that have sound, so silent intros, endings and long pauses are skipped, but it is not synced to the words (no speech recognition). Check and adjust the times in the subtitle list, or upload an exact SRT file.

Can I edit subtitles on a timeline and style each one?

Yes. Drag subtitle blocks on the timeline to move them or change their length (with a sound waveform as a guide), add or split subtitles at the playhead, and undo or redo. Each subtitle can have its own font, size, colours, outline, background box, alignment and position — drag it on the video or type X/Y. There is one subtitle track, no animations or effects, and no speech recognition.

Can viewers turn the subtitles off?

No. Burned-in subtitles are part of the video. Upload a separate .srt file to platforms if you want switchable captions.

Is my video uploaded?

No.

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📖 Guide：How to add subtitles to a video (burn in an SRT or script) · Video Tools ›