Subtitle Sync Shifter
Drop your subtitle file, enter how many seconds it's off, and download the fixed file. Works with SRT and VTT — nothing is uploaded anywhere.
Drop your .srt or .vtt file here, or click to choose
Paste subtitle content or drop a file to begin.
When do you need this?
When subtitles appear too early or too late. If the words show up 2 seconds before they're spoken, shift by +2; if they lag 1.5 seconds behind, shift by -1.5.
Is my file uploaded?
No. Everything runs in your browser with JavaScript. Timestamps that would go below zero are clamped to 00:00:00.