Free · SRT and ASS · no sign-up

Bilingual subtitles: two languages on screen at once

Merge the original subtitles and their translation into one dual-subtitle file. Watch films and lessons with both lines together, the easiest way to learn a language from real videos.

Merge two subtitle files No subtitles yet? Create them from video
1. Original subtitles
2. Translation
First line in the SRT:

Lines that do not start at the same moment are paired by time, so files from different sources still match. Your files are not stored.

How it looks

The ASS file shows the translation smaller and in yellow, above the original line.

How it works

1

Add the two files

The subtitles in the language of the video, and the same subtitles in your language.

2

Merge

Each line is paired with the translation shown at the same time.

3

Download

Bilingual SRT for any player, or ASS with the two languages in different sizes and colours.

Why dual subtitles help you learn a language

Bilingual subtitles built in

Every video you subtitle and translate on SubtitleVideo gets Bilingual SRT and ASS buttons next to the translated file, and the movie subtitle search pairs a film's subtitles in your language with the English ones.

Questions

What are bilingual (dual) subtitles?

Subtitles that show two languages at the same time: usually the language spoken in the video and a translation. Language learners use them to follow the story and pick up new words.

Which players can show them?

The bilingual SRT works in VLC, MX Player, Kodi, Plex, PotPlayer, smart TVs and on YouTube. The ASS file, with two colours and sizes, works in VLC, MPV, PotPlayer and Kodi.

My two files have different timing. Does it still work?

Yes. Each translated line goes to the original line it overlaps most, and a line with no partner is kept on its own, so nothing is lost or shown twice. For the best result use two files made for the same release.

I only have one subtitle file.

Translate it first for free with the Subtitle Translator, then merge both here. No subtitles at all? Create them from the video with AI.

Is it free?

Yes. Merging subtitle files is free and needs no account.

Subtitle and translate a video in one go

Upload a video, pick a translation language and download bilingual subtitles when it is done.

Create bilingual subtitles