MP4 to SRT
Make SRT subtitles from an MP4 video, timed to its speech. Free, with no upload.
Drop an MP4 to make its SRT subtitles
The speech is recognized on your device, so nothing is uploaded and there's no limit on length.
MP3, M4A, WAV, FLAC, and other audio, or a video with sound.
How to convert MP4 to SRT
Open the MP4 and Mastershot writes subtitles from what's said in it, timed line by line, on your device. Download the SRT file and add it to YouTube, your editor, or your player.
Step 1
Choose your MP4Pick a file or drop it above.Step 2
Make the subtitlesLines are timed to the speech on your device.Step 3
Download the SRTAdd it to YouTube, your editor, or your player.
What to expect
- Supported inputs
- MP4 videos, and any other video or recording this browser can read.
- What happens
- Whisper, a speech recognition model, writes down each word with its time, and the words are grouped into short lines that are easy to read. The MP4 itself isn't changed.
- Limits
- The first time, the browser downloads the 77 MB speech model and keeps it. Making subtitles takes about a sixth of the video's length.
Private by design
Your video stays on your device
Mastershot processes your file locally in this browser. It does not need to be uploaded to a server, and you do not need an account to use the tool.
- No upload
- No signup
- No watermark
Questions
To burn them into the picture so they always show, use Add subtitles to video.
No. Everything runs in your browser.