Subtitle Merger and Splitter Online — SRT and VTT
Merge two SRT or VTT subtitle tracks by time, or split one subtitle file at a selected timestamp locally.
Files are processed locally in your browser and are not uploaded.
About this tool
The merger parses cues from two tracks and orders them by start time. Split mode separates one track at a precise timestamp and rebases the second part so it can accompany a separately cut video segment.
How to use
- Choose a supported local file or enter the required values.
- Review the available settings and run the tool.
- Check the result, then download or copy it before closing the page.
Features
- Chronological merge for two subtitle tracks.
- Timestamp-based split with downloadable parts.
- Works with SRT and WebVTT text locally.
Common use cases
- Combine caption sections created by two editors.
- Split subtitles to match two exported video parts.
- Join non-overlapping subtitle files into one timeline.
Common issues and tips
- Overlapping cues are ordered but not automatically rewritten.
- Mixed SRT and VTT features may lose format-specific styling.
Privacy
Your video, image or subtitle data is processed locally in your browser and is not uploaded to Tools12345.
Frequently asked questions
Can merged captions overlap?
Yes. The tool sorts cues but does not remove intentional overlaps.
What happens to the second split part?
Its timestamps are rebased relative to the selected split point.
Does it merge subtitle languages side by side?
It combines cues by time; it does not create bilingual lines automatically.