How to merge two SRT files
TL;DR — Merge two SRT subtitle files into one sorted and renumbered output, then check timing, overlaps, and cue order before delivery.
Use a subtitle merger when you have two valid SRT files and need one final .srt file.
Quick answer
Open the Subtitle Merger, add the first SRT file, add the second SRT file, then download the merged output. The tool sorts cues by start time and renumbers SRT blocks from 1.
Example input
First file:
1
00:00:01,000 --> 00:00:03,000
Welcome back.Second file:
1
00:00:04,500 --> 00:00:06,000
Let's continue with the demo.Merged output:
1
00:00:01,000 --> 00:00:03,000
Welcome back.
2
00:00:04,500 --> 00:00:06,000
Let's continue with the demo.Step-by-step workflow
- Open the Subtitle Merger.
- Upload or paste the first SRT file in the main input.
- Paste or upload the second SRT file in the second input box.
- Check that the merged preview is sorted by time.
- Download the merged
.srtfile. - Play it against the video before publishing.
Common mistakes
Merging files with overlapping cues
The merger keeps both cues. If two captions overlap, the output may still be valid SRT, but it can look crowded in a player.
Mixing formats too early
If one file is VTT and the other is SRT, convert them first or make sure the output format is the one you need. The safest workflow is same format in, same format out.
Forgetting a final sync check
Merging changes cue order and numbering, not timing intent. If one half was already out of sync, fix it with the Subtitle Time Shifter or Partial Subtitle Shifter after merging.
Related guides
Use the Subtitle Merger
Merge two SRT, VTT, or ASS subtitle files into one sorted subtitle file in your browser. No signup, no upload, and everything runs locally in the browser.
Open Merger