Did the video frame rate change? Upload your SRT or VTT file and convert the timings to match the new FPS. Runs instantly in your browser.
Your subtitles are processed locally in your browser. No upload required.
If your subtitle file was created for a video at 24 frames per second (FPS), but your video file plays at 25 FPS, the subtitles will slowly drift out of sync. This tool recalculates every timestamp so it perfectly matches your new video.
Drag and drop your subtitle file (SRT or VTT) or click to upload.
Choose the current frame rate of your subtitles and the target frame rate of your video.
Click 'Convert FPS' to adjust the timing and download your synchronized subtitle file.
It is the process of scaling subtitle timestamps to match a video that plays at a different speed or frame rate.
When a video is converted to another frame rate, its playback duration changes. Subtitle timings must be adjusted proportionally to keep up.
Our online tool supports SubRip (.srt) and WebVTT (.vtt) files, the most widely used subtitle formats.
You can check the frame rate in VLC media player under Tools > Media Information > Codec Details, or in the file properties on your OS.