Caption Editor

How to create accurate closed captions for your videos

Updated over a week ago


Trint’s Caption Editor allows you to easily add accurate captions to any video or audio file and export as an SRT file. This guide will show you the simple steps to create a caption file in Trint.

This support guide will cover:

Creating a caption file

Open the transcript of the video or audio file that you want to add captions to and click on the “Create Caption” button in the navigation bar.

This will create a caption file with the same name as your transcript and it will appear on your My Drive dashboard. You can identify caption files from other Trints by looking for the caption symbol:

Using the Trint Caption Editor

The Trint Caption Editor will display every caption as a line of editable text to show you what text will appear on screen at one time.

If you want to add a line break to a caption:

  • Click in the relevant place and press shift

  • Enter to drop the text onto a new line.

If you want to change the duration of a caption:

  • Click a section of text and look for the highlighted blue block in the bar at the bottom of the Caption Editor.

  • Dragging the edges of a block will expand or reduce its size and change the caption’s duration – without changing its timecode within the file.

To make it easier to edit long caption files, you can zoom into the blue bar and reveal waveforms for your audio track.

💡 The "Fix CPS" button at the top of the player is there to automatically correct all lines that have been flagged, ensuring you spend less time correcting, and more time creating.

What is the CPS box?

Every caption line has a CPS box after the timecodes that stands for “characters per second”. To make sure your audience have enough time to read each caption before it disappears, your CPS should be no more than 20.

If the CPS box is red, you should try to shorten your caption by editing the text (remember that each caption doesn’t have to perfectly match your audio).

You can also break a text into two captions by clicking the line and tapping enter.

This will create a new lower CPS for each caption while still keeping the timecodes lined up with your audio file.

Sharing and exporting

You can collaborate with team members and guests by clicking on the "Share" button on the file.

To export your caption file as an SRT, click on the blue “Export” button in the navigation bar. This will provide you with captions and timecodes that can later be synced up with video using editing software.

We hope you have found this article useful. If you have any questions, please reach out to us at and our team will be happy to help.

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