Do you already have written in your text file, or just raw words ? How long is the video you are captioning? What video editing software or platform do you plan to use? Share public link
In the "Save As" box, explicitly type .srt at the end of your file name. If prompted to use .txt or .srt , choose . 4. Method 2: Convert Using Free Online Converters
For accurate automatic alignment, use OpenAI’s Whisper:
Finally, save the file with the .srt extension instead of .txt . Make sure to select "All Files" or "UTF-8 encoding" when saving to prevent character corruption. how to convert txt to srt file
Result: Subtitles appear every 3 seconds, regardless of speech. This works only for constant-speed narration.
You can create a "dummy" SRT from a TXT, though you still have to add times manually later. FFmpeg primarily burns subtitles; it doesn't generate timestamps from plain text unless used with an external timecode file.
Download Aegisub → Import TXT → Load video → Tap start/end per line → Export SRT. Do you already have written in your text
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After converting TXT to SRT, always test your subtitles with the actual video. Load both files into VLC Media Player (Subtitle → Add Subtitle File). Watch a few minutes at different points to verify synchronization. Check for:
into the structured SRT blocks shown in the anatomy section above, adding sequential numbers and timestamps. Click File > Save As . Share public link In the "Save As" box, explicitly type
Aegisub is free, open-source, and the preferred tool for fansubbers and professional subtitlers alike. Here's how to convert TXT to SRT using Aegisub:
Converting a plain text (.txt) file into a SubRip Subtitle (.srt) file is the easiest way to add custom captions to your videos. Whether you are creating content for YouTube, formatting a film, or making videos accessible, this guide covers every method to change TXT to SRT. What is the Difference Between TXT and SRT?
Right-click the caption track, select , and choose SRT file . Troubleshooting Common SRT Errors