SRT Subtitle Generator
Create timestamped subtitle drafts for videos, courses, and social clips.
What this tool is for
Generate subtitle text with timestamps that can be cleaned into an SRT caption file.
Video creators, educators, editors, podcasters, marketers, and course teams.
Supported formats
- MP4
- WebM
- MP3
- WAV
- M4A
Common use cases
- YouTube captions
- Course subtitles
- Social clips
- Accessibility drafts
Example workflows
Create subtitles from an MP4
Upload the MP4, transcribe the spoken audio, then review timestamps and line breaks before publishing.
Draft captions for a course lesson
Generate a timestamped transcript from a lesson video and clean it into readable subtitle segments.
Repurpose a podcast clip
Transcribe the clip, pick the strongest lines, and use the timed text as a caption draft.
Tips for Better Results
- Keep subtitle lines short enough to read on mobile.
- Review timing before uploading captions to a video platform.
- Fix names, terms, and punctuation manually.
- Use the original video audio when possible instead of a compressed repost.
Why use SuperTextHub?
Files are processed in your browser and are not uploaded to SuperTextHub. The tool is free, does not require an account, and supports transcript copy or download workflows.
Troubleshooting
The captions are not perfectly timed
Treat the output as a draft and adjust timing in your video editor before publishing.
The SRT needs different line breaks
Copy the transcript into your caption editor and split long lines for readability.
The video has music under speech
Background music can reduce accuracy. Use a cleaner audio export if available.
Frequently Asked Questions
Does SuperTextHub export a finished SRT file?
It creates timestamped transcript drafts. Review timing and formatting before using subtitles in production.
Can I generate subtitles without uploading my video?
Yes. The media file is processed locally in your browser.
What is the best source file for SRT generation?
Use the cleanest video or audio export you have, ideally with clear speech and low background noise.