SRT File Merger
Upload two SRT files and merge them into a single subtitle file. The second file's timestamps are automatically offset to follow the first.
Drag and drop .srt or click to upload
Max 2 MB
Drag and drop .srt or click to upload
Max 2 MB
Free Online SRT Merger
Combine two SRT files with automatic timestamp offsetting
When a video is split across two files, its captions are split too. This tool merges the two SRT files into one, automatically calculating the correct offset so the second file's cues follow directly after the first.
Why Timestamps Need Offsetting
Each SRT file starts its timestamps from zero. When you combine two videos, the second video's content no longer starts at zero — it starts where the first video ended.
If you simply concatenate the SRT files without adjusting timestamps, the second file's captions would all appear at the wrong time — starting from the beginning of the combined video instead of where the second segment actually begins.
This tool handles the offset calculation automatically. You set the gap (if any), and every cue in the second file is shifted by the correct amount.
How To Merge SRT Files
A four-step subtitle merge workflow
Step 1
Upload your first SRT file
Start with the SRT file that should come first in the merged output. The merger reads the last timestamp to calculate where the second file should start.
Step 2
Upload your second SRT file
Upload the SRT file that should follow the first. Its timestamps start from zero in the original file — the tool offsets them automatically.
Step 3
Set a gap (optional)
Enter the number of seconds of silence between the two files. Use 0 for back-to-back content. Use a positive value to match a natural pause in the combined video.
Step 4
Merge and download
Click Merge and the combined SRT downloads immediately. All cues are re-numbered sequentially and the second file's timestamps are correctly offset to follow the first.
Best Use Cases
When to use an SRT merger
This tool is for editors and producers who have separate SRT files for segments of the same video and need to combine them into a single subtitle file for the assembled cut.
Combine split video parts
When a long video is split into two files for upload or delivery, merging the SRT files creates a single subtitle track for the combined video.
Rejoin edited exports
If a project was exported in parts and later re-joined, the original per-part SRT files need to be merged and offset to match the combined runtime.
Add an intro or outro
If you have a separately captioned intro or outro and a separately captioned main segment, merging the two SRT files creates a single subtitle file for the full assembled video.
FAQ
Frequently asked questions about merging SRT files
CaptionX generates perfectly timed captions inside Premiere Pro
Skip the split-file problem entirely. CaptionX captions your full timeline directly in Adobe Premiere Pro — synced from the start, no merging required.
Full timeline captioning
Caption your entire Premiere Pro sequence in one step, regardless of length.
57+ languages
Generate captions in Arabic, Chinese, Hindi, Spanish, and 53 more languages.
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