Subtitle Tools
Fix timing, clean formatting, and validate subtitles instantly in your browser.
Files never leave your browser
No uploads, no waiting, no limits
Fix timing, cleanup, quality & encoding
Industry standard subtitle formats
Subtitle File Processor
Drop files here, click to browse or paste (Ctrl+V)
Supports: SRT • VTT
Timing
Shift all subtitle timestamps forward or backward with millisecond precision.
Positive values delay subtitles, negative values make them appear earlier.
Why Professional Subtitle Tools?
Adjust subtitle timing with millisecond precision. Shift, sync, change speed, or convert frame rates to match your video perfectly.
Remove unwanted elements like SDH markers, watermarks, speaker labels, and formatting. Clean up spacing and normalize text for a polished result.
Detect issues like reading speed problems, overlaps, gaps, duration errors, and line length violations. Auto-fix with smart algorithms or manually fine-tune.
Convert between SRT and VTT formats. Fix text encoding issues and normalize line endings for cross-platform compatibility.
100% Private & Local
All processing happens in your browser. Your subtitle files never leave your device. No uploads, no cloud processing, complete privacy.
Smart Auto-Fixing
Automatically detect and correct common issues while respecting timing constraints. Review and fine-tune complex cases for best results.
Multi-File Merging
Combine multiple subtitle files into one. Add delays between segments, reorder files, and export as SRT or VTT for continuous playback.
Industry Standards
Quality checks follow Netflix and broadcast standards for CPS (characters per second), duration, line length, and timing to ensure professional results.