No. Renaming changes the extension but not the structure. A video player will try to read the file, see no timestamps, and fail (or display all text at once for 1 second).
Sometimes, the best tool is Notepad (or TextEdit). If you have a very short video (e.g., a 30-second ad) and a simple text file, manually typing the timecodes into a text editor is faster than learning new software.
Example Format:
1 00:00:01,000 --> 00:00:03,000 Hello and welcome to the review.
2 00:00:03,500 --> 00:00:06,000 Today we are looking at text files.how to convert txt to srt file
Simply save this as filename.srt.
When you have a transcript without any timing data, you need software that allows you to "sync" the text to the video manually or semi-automatically. Simply save this as filename
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Review: Tools like Subtitle Edit are superior because they bridge the gap between text and timing. They often feature a "Visual Sync" mode where you can load the video, load the text, and simply tap a button to mark when a line starts and ends.
When you convert your TXT, pay attention to these details or your subtitles will fail validation: When you have a transcript without any timing
ffmpeg conversions
If manual conversion seems tedious, you can use online tools to convert .txt to .srt: