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100% Client-Side Processing · Zero Subtitle Leakage
Subtitle Converter & Sync
Losslessly convert between SRT and WebVTT formats, shift timecodes in milliseconds, strip styling tags, and renumber cues.
Target Format:
Time Shift (seconds):
+ delays, - advances
0 cues
Auto Detect Format
Ready
Three Steps to Convert and Sync Subtitles
1
Import Subtitle File
Paste text or drop in an existing SRT or VTT file for instant parsing.
2
Adjust Offset & Cleaning
Enter offset seconds to shift all timecodes and optionally strip HTML tags.
3
Copy or Download
Export clean .vtt or .srt ready for HTML5 video players or video editors.
Frequently Asked Questions
Q: What is the main difference between SRT and WebVTT?
WebVTT is the W3C standard for HTML5 video with a WEBVTT header and period (.) millisecond delimiters, whereas SRT uses comma (,) delimiters and numeric cue indices.
Q: Can negative time offsets break timestamps?
No. Safety clamping ensures that timestamps never fall below 00:00:00.000.