Converter
Subtitle Timing Tools
Shift (offset) and stretch (scale) subtitle timestamps to fix sync drift, late starts, or speed mismatches. Works on LRC, SRT, VTT and ASS — entirely in your browser.
Detected: unknown
+ later · − earlier
1.0 = no change · 1.04 ≈ 25→24 fps
Common fixes
- Subtitles 2 seconds late? Set offset to
-2000. - 25fps → 24fps mismatch: set scale to
1.04167. - 23.976fps → 25fps: set scale to
0.95904. - Drift increases over time? That's a scale problem, not an offset one — adjust scale until the end of the file syncs, then nudge offset.
Questions answered
Frequently asked questions
Two things, and only the timestamps: an offset in milliseconds that moves every cue earlier or later by the same amount, and a scale multiplier that stretches or compresses the whole timeline. Your subtitle text is never touched.
LRC, SRT, VTT and ASS. The format is auto-detected from what you paste or open, and you can override the guess from the Format dropdown. In an LRC, word-level timestamps are shifted along with the line timestamps, so word-synced lyrics stay intact.
That's a scale problem, not an offset one: a constant offset shifts everything equally, while drift that grows over time means the timeline runs at the wrong rate. Adjust the scale until the end of the file lines up, then nudge the offset for the start. For a 25 to 24 fps mismatch use about 1.04167; for 23.976 to 25 fps use about 0.95904.
No. This page parses, re-times and rebuilds your subtitle entirely in your browser — nothing is sent to our servers, and you don't need an account. The download is generated locally from the text in the output box.