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Sync Subtitles Online
Fix subtitle timing by adjusting the offset. Upload your subtitle file, set the millisecond offset, and download the corrected file.
Drop your subtitle file here
or click to browse — .srt, .vtt, .ass, .ssa
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Translate SubtitlesFrequently Asked Questions
How do I fix subtitle timing?+
Upload your SRT file, set the offset in milliseconds (positive if subtitles are late, negative if early), preview the result, and download the corrected file.
Why are my subtitles out of sync?+
Common causes: different video versions (broadcast vs streaming), frame rate mismatches (23.976fps vs 25fps), removed ad breaks, or re-encoded video with different timing.
Can I adjust subtitle timing online?+
Yes! This tool is free, instant, and runs entirely in your browser. No software to install, no signup required.
What does a positive vs negative offset mean?+
Positive offset (+ms) makes subtitles appear later (if they are too early). Negative offset (-ms) makes them appear earlier (if they are too late).
What formats are supported?+
SRT, VTT (WebVTT), and ASS/SSA subtitle files. The format is auto-detected from your file.