SubtitleSync

Shift every line earlier or later, or stretch the timing to fit, then save the corrected subtitle file.

Runs in this tab. Nothing is uploaded. Works offline.

SubtitleSync with a sample subtitle file shifted 2.5 seconds earlier, flagging one overlap and one line too fast to read — What you'll get, shown on the tool's own sample

Drop an SRT or VTT file here

or click to choose one, paste the text, or try the sample

Reads SRT and WebVTT subtitle files saved as UTF-8 text. It changes timing only: it doesn't transcribe or translate. WebVTT styling blocks and cue position settings aren't kept in the saved file. ASS/SSA files aren't supported.