Merge Subtitles

What this tool does

This tool joins subtitle files for a video split into parts, such as CD1 and CD2, into one file. Each part is moved by the length of the parts before it, which you enter or leave for the tool to estimate. Lines are renumbered, and ASS styles from every part are kept.

How to merge subtitle files

1. Select Choose files and add the subtitle file of each part, or use Paste text for each one.
2. Check the order. The first file in the list is part 1; use the arrows to move a file up or down.
3. In Video length of each part, enter the length of the part 1 video, such as 00:45:00,000.
4. Select Merge and check Where each file starts in the result.
5. Select Download to save the merged file.

Options explained

• Video length of each part sets where each later file starts. With 3 or more files, enter one length per part except the last, separated by “;”. Leave it empty to start each file right after the previous file’s last subtitle.
• Gap after each file (seconds) adds time after the previous file’s last subtitle. It is used only when the video length is empty. The default is 0.
• Output format defaults to the format of the first file. You can choose SRT, WebVTT or ASS instead.
• Subtitles are renumbered from 1, and WebVTT cue IDs are rewritten. The file is saved as UTF-8 with the name of the first file plus “.merged”.

Example

Part 1 and part 2, merged with Video length of each part set to 00:45:00,000:

1
00:00:01,000 --> 00:00:03,000
Where were we?

2
00:44:57,000 --> 00:44:59,500
To be continued.

1
00:00:02,000 --> 00:00:04,000
Previously, on the road.

Output:

1
00:00:01,000 --> 00:00:03,000
Where were we?

2
00:44:57,000 --> 00:44:59,500
To be continued.

3
00:45:02,000 --> 00:45:04,000
Previously, on the road.

Format notes and limits

• Reads SRT, VTT, ASS, SSA, SBV and TXT with times. ASS styles you turn off are left out of the merged file.
• If subtitles of a part start after the length you entered, the page warns you, because they would overlap the next part.
• Up to 50 files, 20 MB per file and 200 MB in total.
• To cut a file into parts instead, use Split subtitles. If the merged file is early or late as a whole, use Shift subtitles.

Questions