How to fix a constant subtitle delay

A constant delay means every subtitle appears early or late by roughly the same amount. You can correct that by moving all cue start and end times together. First check a line near the start and another near the end of your video.

Example: subtitles appear two seconds early

Suppose a caption appears at 00:00:10.000, but you hear the matching words at 00:00:12.000. Move the subtitle later by +2 seconds, or +2000 milliseconds. A cue ending at 00:00:13.000 will now end at 00:00:15.000, preserving its duration.

Example: subtitles appear too late

If the matching speech happens before the caption, use a negative offset. A cue at 00:00:10.000 shifted by −1.5 seconds starts at 00:00:08.500. If any cue would start before zero, CueFern rejects the shift and keeps your original input; reduce the offset or use a specialist editor to handle the opening section.

Apply and verify the shift

1. Open the subtitle time shifter and load an existing SRT or VTT file.
2. Select seconds or milliseconds and enter the offset.
3. Process the file. Compare the original and result times below the subtitle card.
4. Download, then check at least one line near the beginning, middle and end against the actual video.

When the delay changes over time

If a line at the beginning is one second late but a line at the end is ten seconds late, an overall shift will fix only one part. Different video cuts, inserted scenes or timing drift may require multiple anchors or specialist subtitle editing. This version does not stretch subtitle timing or analyze the video's audio.

The decorative subtitle card shows individual text cues. It does not play your video and cannot confirm whether speech and text are synchronized. You must check the exported file against the video yourself.