What is an SRT File?

How to Open, Edit, & Convert SRT Files

SRT Files
SRT Files.

A file with the .SRT file extension is a SubRip Subtitle file. These types of files hold video subtitle information like the start and end timecodes of the text and the sequential number of subtitles.

It's important to note that SRT files themselves are just text files that are used along with video data. This means the SRT file itself does not contain any video or audio data.

How to Open SRT Files

Notepad++ or any other text editor can open SRT files since they're just plain text files.

Jubler and Aegisub are dedicated SRT editors if that's what you're looking for.

However, the most common reason someone wants to open an SRT file is to use it with a video player so that the subtitles will play along with the movie.

In that case, you can open an SRT file with programs like VLC, MPC-HC, KMPlayer, MPlayer, BS.Player, or Windows Media Player (with the VobSub plugin). The SRT format is supported for YouTube videos as well, meaning you can even use the subtitles in one of your YouTube videos.

For example, when you have a movie open in VLC, you can use the Subtitle > Add Subtitle File... menu to open the SRT file and have it play with the video. A similar menu can be found in all the other video players mentioned above.

Note: Some of those multimedia players probably can't open an SRT file unless a video is already open. To open an SRT file without a video, just to see the text, use one of the text editors mentioned above.

See How to Change the Default Program for a Specific File Extension in Windows if your SRT file is opening in a different program than you want it to open with. However, remember that because most video players that support SRT files probably have a special menu for opening it, like with VLC, you might have to open the program first and then import the SRT file instead of just double-clicking it.

Tip: If you can't open your file in the ways described above, you might instead have an SRF file, which is a Sony Raw Image file. SRF files can't open in the same way as SRT files.

How to Convert an SRT File

Some of the SRT editors and video players above can convert SRT files to other subtitle formats. Jubler, for instance, can save an open SRT file to an SSA, SUB, TXT, ASS, STL, XML, or DXFP file, all of which are different types of subtitle formats.

You can also convert SRT files online at websites like Rev.com and Subtitle Converter. Rev.com, for example, can convert the SRT file to SCC, MCC, TTML, QT.TXT, VTT, CAP, and others. It can do so in batch and will even convert the SRT file to multiple formats simultaneously.

Note: An SRT file is just a text file, not a video or audio file. You can not convert SRT to MP4 or any other multimedia format like that, no matter what you read elsewhere!

How to Create an SRT File

You can build your own SRT file using any text editor, so long as you keep the format correct and save it with the .SRT file extension. However, an easier way to build your own SRT file is to use the Jubler or Aegisub program mentioned at the top of this page.

An SRT file has a particular format it has to exist in.

Here's an example of just a snippet from an SRT file:

1097
01:20:45,138 --> 01:20:48,164
You'd say anything now
to get what you want.

The first number is the order that this subtitle chunk should take in relation to all the others. In the full SRT file, the next section is called 1098, and then 1099, and so on.

The second line is the timecode for how long the text should be displayed on the screen. It's set up in the format of HH:MM:SS,MIL, which is hours:minutes:seconds,milliseconds. This explains how long the text should display on the screen.

The other lines are the text that should show up during the time period defined right above it.

After one section, there needs to be a line of blank space before you start the next, which in this example would be:

1098
01:20:52,412 --> 01:20:55,142
You want to feel sorry for yourself,
don't you?

More Information on the SRT Format

The program SubRip extracts subtitles from movies and displays the results in the SRT format as described above.

Another format that was originally called WebSRT, uses the .SRT file extension too. It's now called WebVTT (Web Video Text Track) and uses the .VTT file extension. While it's supported by major browsers like Chrome and Firefox, it's not as popular as the SubRip Subtitle format and doesn't use the exact same format.

You can download SRT files from a variety of websites. One example is Podnapisi.net, which lets you download subtitles for TV shows and movies using an advanced search to find the exact video by year, type, episode, season, or language.

MKVToolNix is one example of a program that can delete or add subtitle files from MKV files.