: Upload your video and the transcript TXT file. Select "without timing," and YouTube will automatically synchronize the text with the audio. You can then download the result as an SRT.

Before converting, it's essential to understand the SRT file format. An SRT file consists of:

For a text file to work as a subtitle, it must follow a strict, four-part structure for every caption block: : A counter starting at 1.

No software install, fast auto-sync. Cons: Limited file size on free plans.