How to Create an SRT File from a Video
An SRT file is a plain-text list of subtitles with times, which players and platforms can show on top of a video. Here is what is inside one and how to make one without typing it all by hand.
What is inside an SRT file
It is a text file made of numbered blocks. Each block has a number, a time range such as 00:00:01,000 --> 00:00:03,500 (start and end), and the line of text to show. Blocks are separated by a blank line. You can open an SRT in any text editor.
Why create one
- Many platforms let you upload an SRT so viewers can turn captions on or off.
- You can translate the text and keep the same timing.
- You keep a searchable text version of what was said.
Create an SRT with Offcaps
- Drop in your videoOpen it in Offcaps. It transcribes on your Mac with word-level timing.
- Check the textRead it and fix names, brands and numbers.
- ExportChoose SRT. Offcaps can also export VTT (the web format) and plain text.
FAQ
What is the difference between SRT and VTT?
Both are subtitle text files with times. VTT is the format used on the web; SRT is the most widely supported.
Can I edit an SRT by hand?
Yes. It is plain text: you can fix words or timing in any text editor.
Does Offcaps upload my video?
No. It works on your Mac.
What does Offcaps need?
Offcaps requires macOS 26 or later.