How do I fix subtitles that appear too early?

If subtitles appear too early, enter a positive number in milliseconds. For example, +2000 will delay all subtitles by 2 seconds.

How do I fix subtitles that appear too late?

If subtitles appear too late, enter a negative number in milliseconds. For example, -1500 will make all subtitles appear 1.5 seconds earlier.

What subtitle formats are supported?

Our subtitle shifter supports SRT, VTT, SUB, ASS, SBV, and STL formats. The tool automatically detects the format and preserves all formatting.

How many milliseconds are in a second?

1 second equals 1000 milliseconds. So to shift subtitles by 2.5 seconds, you would enter 2500 milliseconds.

Is the subtitle shifter free to use?

Yes, our subtitle shifter is completely free to use with no registration required. You can shift unlimited subtitle files.

Free Subtitle Shifter - Sync & Fix Out of Sync Subtitles

Fix out of sync subtitles by adjusting timing in milliseconds. Perfect for when subtitles appear too early or too late. Professional subtitle synchronization made easy.

SRT

VTT

SUB

ASS

SBV

STL

Free •Always Available • No Registration Required

Upload Subtitles

Upload your subtitle file or paste content directly

Choose subtitle file

Timing Adjustment

Enter the number of milliseconds to shift

1 second = 1000 milliseconds
• Positive numbers: subtitles appear later
• Negative numbers: subtitles appear earlier

Shift amount (milliseconds)

How to Use the Subtitle Shifter

Common Scenarios:

• Subtitles appear too early: Use positive numbers (e.g., +2000 for 2 seconds delay)
• Subtitles appear too late: Use negative numbers (e.g., -1500 for 1.5 seconds earlier)
• Fine-tuning: Use small values like ±500ms for precise adjustments

Supported Formats:

• SRT: Most common subtitle format
• VTT: Web Video Text Tracks
• SUB: MicroDVD subtitle format
• ASS: Advanced SubStation Alpha