How do I convert IDX and SUB files to SRT?

Add both files of the pair, such as Movie.idx and Movie.sub. Pick the subtitle track if there is more than one, check the language, then choose Convert to SRT. When the text has been read, download the SRT.

What are VobSub (.idx and .sub) files?

VobSub is how DVD subtitles are saved outside the disc. The .sub file holds the subtitles as small pictures and the .idx file lists their colours, languages and times. Many players, editors and video sites need text subtitles such as SRT instead.

Do I need both files?

Yes. The .sub file has the pictures and the .idx file says when each one shows and in which colours, so the converter needs the pair.

Are my files uploaded?

No. Both files are opened and the text is recognised in your browser, so they never leave your device.

How accurate is the conversion?

DVD subtitles are small, low resolution pictures, so OCR can misread a letter now and then. Lines the reader is unsure about are marked so you can check them, and you can fix any line in the SRT Editor.

Which languages can it read?

29 languages, including English, Spanish, French, German, Portuguese, Arabic, Russian, Chinese, Japanese and Korean. The language is picked from the subtitle track when the .idx file names it.

VobSub to SRT Converter

Turn DVD subtitles (an .idx and .sub pair) into an SRT file. The text is read from each subtitle picture with OCR.

Everything happens in your browser. Your files are never uploaded.

IDX and SUB files

Drag and drop the .idx and .sub files here, or click to choose both

They come as a pair with the same name, such as Movie.idx and Movie.sub.

Add the .idx file
Add the .sub file

DVD Subtitles

Why IDX/SUB subtitles need converting

DVDs store subtitles as small pictures, and ripping tools save them as a VobSub pair: a .sub file with the pictures and an .idx file with their times, colours and languages. A DVD player or VLC shows them, but editors, video sites and many TVs and media servers only take text subtitles such as SRT.

This converter reads the words in each picture with optical character recognition (OCR) and writes them into an SRT file at their original times. A line that appears more than once is read once.

How It Works

How to convert IDX/SUB to SRT

Step 1

Add the .idx and .sub files

Drop in both files of the pair. If the .idx lists several languages, pick the track you want.

Step 2

Convert to SRT

Each subtitle picture is read with OCR, several at a time, and keeps its original timing.

Step 3

Check and download

Look over any lines marked to check, then download the SRT.

FAQ

VobSub to SRT questions

No Subtitle File at All?

Caption X makes subtitles from the audio. Try it free.

Generate accurate, timed captions from your video in 100+ languages, in the browser or inside Adobe Premiere Pro, then export the format you need.

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