Subtitle frame-rate converter · In your browser
Subtitle frame-rate converter
Scale subtitle timing between frame rates or align a growing delay using two matching sync points.
Drop a file here. Up to 5 MiB of UTF-8 text and 20,000 cues per file. Nothing is saved after reload.
How to use it
Your file, ready for its next step.
- Open your subtitles. Choose a file, paste SRT or VTT, or try the sample. No account needed.
- Choose your changes. Adjust the options and run the tool. Read any warnings before continuing.
- Check and download. Review the output and save a new file. Your original stays unchanged.
Worked example
Subtitle frame-rate converter, in practice.
Converting 25 fps timing to 23.976 fps scales times by 25 / 23.976. A cue at 60 seconds moves to about 62.563 seconds.
Before you download
Choose frame-rate conversion only when the video playback speed changed. For other linear drift, use two widely separated current and corrected times.
These tools work with existing SRT and WebVTT files. If you need captions from audio, open the video caption editor instead. Files are limited to 5 MiB and 20,000 cues per input. Results stay in this tab until you copy or download them.
Questions
A few useful answers.
How do two sync points work?
Match one early cue and one late cue to the video. The tool calculates a scale and offset applied equally to every start and end.
Are my files private, and what are the limits?
Processing stays in this browser without an account. Each subtitle input is limited to 5 MiB of UTF-8 text and 20,000 cues. Session recording is disabled here. Closing or reloading the page clears your work.
From video to finished captions
Need the words first?
Generate captions, refine the timing and style your video in ClipSubtitles.