The subtitle merger combines two SRT files into one. Use Combine mode to merge two files sorted by timestamp (for dual-language tracks), or Append mode to join two halves of a split subtitle file with an optional time offset.
File 1
File 2
Merge Options
How to Merge Two SRT Subtitle Files
Subtitle merging is useful in two common scenarios: combining subtitles in different languages into one file (so both show simultaneously), or joining two subtitle files that cover split halves of a single video.
Combine Mode — Merging Dual-Language Subtitles
Upload both subtitle files and select "Combine." The tool parses both files, pools all cues, and sorts them by start timestamp. The resulting file contains all subtitles from both inputs in chronological order. This is useful for creating bilingual subtitle tracks or merging transcription and translation files.
Append Mode — Joining Split Files
Select "Append" to place all File 1 cues first and all File 2 cues after. If your video was split and File 2 starts at a later time, enter the offset in seconds. For example, if File 1 covers a 42-minute video, set the offset to 2520 seconds (42 × 60) to shift File 2 timestamps accordingly.
After Merging
The merged file is immediately available for download. For best results, run the merged file through the SRT Cleaner to remove any duplicate cues that may have been created during the merge process.
Frequently Asked Questions
What are the two merge modes?
Combine mode merges cues from both files and sorts them chronologically by start time — ideal for merging dubbed and translated tracks. Append mode adds all File 2 cues after all File 1 cues (with an optional time offset) — ideal for joining two halves of a split subtitle file.
What is the time offset in append mode?
If your video was split into two parts and the second part starts at, say, 45 minutes, you would add a +45 minute offset to all File 2 timestamps before merging. This ensures File 2 cues appear at the correct time in the combined video.
What happens to duplicate cues after merging?
The merger doesn't automatically remove duplicates — use the SRT Cleaner afterward if you want to remove overlapping or identical cues from the merged result.
Can I merge VTT files?
This tool is optimized for SRT files. For VTT, convert to SRT first using the VTT to SRT Converter, merge, then convert back if needed.
Is this tool free and private?
Yes — completely free with no signup. Both files are processed entirely in your browser. They are never uploaded to any server.