How do I convert a SUB file to SRT?

Add the .sub file and download the SRT. A MicroDVD .sub converts straight away. A DVD .sub comes with an .idx file: add both and choose Convert with OCR, which reads the text from the pictures.

Why are my subtitles out of sync after converting?

MicroDVD times count video frames, so they depend on the frame rate. Choose your video's frame rate next to the file, such as 25 for PAL video or 23.976 for most films, and download again.

Which kinds of .sub file are there?

Three. A MicroDVD .sub is plain text with frame numbers like {100}{150}. A SubViewer .sub is plain text with times like 00:01:00.10,00:02:00.20. A DVD .sub (VobSub) holds pictures of the text and always comes with an .idx file of the same name.

Can I convert MPL2 subtitles too?

Yes. MPL2 files, which write times in tenths of a second like [10][35], convert the same way.

Yes. Italic, bold and underline styles are kept, and line breaks marked with | become real line breaks. Colours, fonts and positions are left out.

Are my files uploaded?

No. The conversion runs in your browser, so your subtitles stay on your device.

SUB to SRT Converter

Convert MicroDVD and SubViewer (.sub) subtitles to SRT, VTT and other formats. DVD subtitles (.idx and .sub) go to text recognition.

Your files are converted in your browser and never uploaded. Every file is saved as UTF-8.

Convert to

Subtitle files

Drag and drop subtitle files here, or click to choose

MicroDVD or SubViewer .sub files, or a DVD .idx and .sub pair. Text files up to 2 MB each.

Or paste subtitle text

SUB Files

Which kind of .sub file do you have?

Three different subtitle formats use the .sub extension. Open the file in a text editor: numbers in curly brackets mean MicroDVD, and time lines like 00:01:00.10,00:02:00.20 mean SubViewer. If it looks like random symbols and there is an .idx file next to it, it is a DVD subtitle. All three work here.

MicroDVD (.sub as text)

Each line looks like {100}{150}Hello. The numbers are video frames, so the frame rate matters. Many files name it on the first line. If yours does not, pick your video's frame rate next to the file.

SubViewer (.sub as text)

Each subtitle starts with a time line like 00:01:00.10,00:02:00.20, often under an [INFORMATION] header. It converts straight away, and [br] becomes a line break.

DVD subtitles (.idx and .sub)

A .sub that comes with an .idx file holds pictures of the text instead of text. Add both files and choose Convert with OCR to read them into an SRT file.

How It Works

How to convert SUB to SRT

Step 1

Add your .sub file

Drop in a MicroDVD or SubViewer .sub, or a DVD .idx and .sub pair. Add one file or up to 20.

Step 2

Check the frame rate

MicroDVD files use the frame rate they name, or 23.976. Pick your video's rate if the subtitles drift.

Step 3

Download the SRT

Download each file on its own or all of them at once.

FAQ

SUB to SRT questions

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VobSub to SRTTurn DVD subtitles (.idx and .sub) into an SRT file with OCR.Subtitle ConverterConvert subtitle files between SRT, VTT, ASS, SBV, TXT and JSON.SRT Timing AdjusterShift every subtitle earlier or later when the sync is off.SMI to SRTConvert SAMI subtitles to SRT, in the language you choose.SUP to SRTTurn Blu-ray subtitles into an SRT file with OCR.Extract SubtitlesGet the subtitle tracks out of an MKV, MP4 or MOV video.