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.