Subtitle Merger for Bilingual SRT and VTT

Online tool for merging two subtitle files into a single bilingual file. Combine original dialogue with translation, match entries by timestamp, and export a ready-to-use SRT. All processing happens in your browser.

How to Merge Subtitles

1
Upload primary subtitles

Drag and drop or select the main subtitle file (SRT or VTT). This will appear as the top line.

2
Upload secondary subtitles

Add the second subtitle file — typically a translation or alternate language.

3
Choose settings

Select the separator (new line or dash) between the two subtitle lines.

4
Click Merge

The tool matches entries by timestamp overlap and combines them into bilingual pairs.

5
Preview and download

Check the preview, then download the merged SRT file ready for your video player.

Merge original and translation into one SRT or VTT with position and style options

Primary Subtitles (top line)
SRT or VTT
Secondary Subtitles (bottom line)
SRT or VTT
Separator
Layout Top / Bottom
⚠
Preview

Features

Merge two subtitle files into one bilingual track
Stack an original SRT or VTT on top and its translation below, then export a single SRT that plays both languages on screen at once.
Smart timestamp matching — pairs entries even with different segment counts
Lines are paired by more than 50% timestamp overlap, so files with different segment counts still line up instead of drifting out of sync.
Choose separator: new line or dash between languages
Put each language on its own line for stacked captions, or join them with a dash to keep both languages compact on a single row.
Instant preview of merged result before downloading
See the combined bilingual entries rendered in the browser first, so you can confirm the pairing looks right before saving the SRT file.

What You Can Do

  • Create bilingual subtitles for language learning — see original and translation simultaneously
  • Combine subtitles in any two languages for foreign films or series
  • Merge hearing-impaired subtitles with standard dialogue subtitles
  • Prepare dual-language subtitles for educational or training videos
  • Combine forced subtitles (signs/text) with full dialogue subtitles

Frequently Asked Questions

What subtitle formats are supported?

SRT and VTT (WebVTT). The output is always SRT format, which is compatible with virtually all video players and platforms.

What if the two files have different entry counts?

The tool matches entries by timestamp overlap (>50%). Entries from the primary file without a match appear as single-language. Extra entries from the secondary file are added at the end.

Can I use this for language learning?

Yes. Combine original dialogue subtitles with a translation to see both languages simultaneously while watching. This is one of the most effective methods for learning a language through video.

Can I merge more than two files?

The tool merges two files at a time. To combine three files, first merge two, then merge the result with the third.

Which line appears on top?

The primary file (left upload zone) appears on top, and the secondary file appears below it. In most video players, the last line of a subtitle entry is displayed at the bottom of the screen.

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Who is this tool for?
🎬 Video Creators ✨ Content Creators 📚 Educators & Teachers
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