Combine two SRT files into bilingual subtitles

Join two tracks for the same video into one SRT. Processing happens in this browser.

Combine two SRT files into bilingual subtitles

Already have two subtitle tracks for the same video? Combine them locally into one SRT. The first file appears above the second; this tool does not translate either file.

Use two UTF-8 SRT files for the same video, each up to 5 MiB and 5,000 cues. The tool divides time wherever either track starts or ends and stacks the text visible in each interval; cue numbers and boundaries change, and intervals with only one track remain. This does not synchronize or match meaning. Very short cues, overlapping lines, formatting tags and reading speed need review with the video. Files remain in this browser; site analytics may use the network.

Need to create a translation first? Open the subtitle translator. Translation uploads your file and uses the displayed sample or credits.

How time-based merging works

  1. Choose two UTF-8 SRT files for the same version of a video. The first appears above the second.
  2. Each cue start or end creates an output boundary. Overlapping text is stacked; intervals with one track remain.
  3. Download and review with the video, especially short segments and scene changes. Correct synchronization in the source files before combining.

This tool does not translate, match meaning or repair offsets. Cue numbers and boundaries change, and the file can have more cues. SRT does not independently control the position or style of each language.

Need to create one of the tracks? Open the subtitle translator. Translation is a separate step that uploads your file and uses the available sample or credits.

Need to correct text or timing before combining? Open the local SRT editor. Open and save each file separately, then return with both tracks.