PRIVATE SUBTITLE TOOLS
Bilingual subtitle merger & splitter
Merge aligned subtitle tracks or split bilingual subtitles by line. Preview text and export privately, without uploading files.
Free to use. Files stay on your device.
01
Open your files
Open aligned subtitle tracks to merge, or a bilingual track to split.
02
Review the result
Merging requires equal cue counts and start/end times within 500 ms. Splitting uses a chosen line boundary.
03
Export with care
Preview the result and export. This tool does not translate or detect languages.
Read the subtitle workflow guide. JavaScript enables the local workspace; subtitle content is never uploaded.