KAKUCUT GUIDE

How to open, edit & export
SRT files on iPhone.

To open an SRT file on iPhone in KakuCut, open a video project, go to Captions, and choose Import an SRT file. Select your subtitle file from Files, then preview and edit the captions alongside your video. When you are done, export an SRT file or an MP4 with visible captions.

Updated November 8, 2026 · By KakuCut

1. How to open an SRT file on iPhone

Save the .srt attachment or download to the Files app on your iPhone.
Open KakuCut and create or open a project with the video that matches your subtitles.
Open Captions from the editing tools. If the project has no captions yet, tap Import SRT. If it already has captions, tap the ⋯ button at the top of the Captions panel and choose Import an SRT file.
Select your SRT file in the file picker.

Importing replaces all current caption lines, including your edits, so KakuCut asks you to confirm first. Your caption style is kept, and you can undo the import in the editor.

KakuCut Captions panel with the Import SRT button beside Generate captions — In a project without captions, tap Import SRT beside Generate captions to choose a subtitle file from Files.

2. Preview and edit the imported subtitles

Play the video to check that the captions line up with the speech. Open a caption in the Captions panel to correct its text or adjust its timing. Importing an SRT gives you editable subtitle lines; you do not need to generate captions from speech again.

KakuCut caption list showing two editable caption segments — Review imported caption lines and edit their text and timing.

3. Export an SRT file or a captioned video

Check the caption text and timing first; the SRT contains exactly the captions in your project. Then tap the share/export icon at the top right of the editor and tap Export subtitles below Export video. You do not need to export the video first.

The share sheet opens with a file named after your project, such as My Trip captions.srt. Choose Save to Files to keep it, or send it to another app with AirDrop, Mail, or Messages. Each caption keeps its start time, end time, and text. Captions hidden by a clip trim are left out.

KakuCut export screen with Export video and Export subtitles buttons — Export subtitles appears on the export screen once the project has captions.

To share a video with captions already visible, choose Export video instead. This keeps your caption font, color, and position in the exported MP4.

4. What KakuCut expects in an SRT file

An SRT file is plain text. Each caption has a number, a time range, and one or more lines of text, separated from the next caption by a blank line:

1
00:00:01,200 --> 00:00:03,800
Welcome back to the channel.

2
00:00:04,000 --> 00:00:06,500
Today we are making ramen.

Save the file as UTF-8 text so accented and Chinese, Japanese, or Korean characters import correctly. Times use hours:minutes:seconds,milliseconds, and each caption must end after it starts.

SRT or captions burned into the MP4?

Use Export video when you want captions visible in the video, with your font, color, and position. Use Export subtitles when a platform or another editor asks for a separate subtitle file. SRT stores only text and timing; it does not keep KakuCut caption styles or word highlighting. You can export both from the same project.

How to add automatic captions to an iPhone video

Why won’t my SRT file open on iPhone?

If tapping the file does not open a subtitle editor, open KakuCut first and use Captions → Import an SRT file. Select the file from Files inside the app. If the import reports an error, check the format below.

“This SRT file contains an invalid timestamp.”

Check that every time range looks like 00:00:01,200 --> 00:00:03,800, including the hours. Minutes and seconds must be below 60.

“Every SRT caption must end after it starts.”

One caption has an end time equal to or earlier than its start time. Fix that line in a text editor and import again.

“No timed captions were found in this SRT file.”

The file has no caption blocks with a time range and text. Make sure you chose the .srt file, not a video or a different subtitle format.

Characters look garbled

The file is probably not UTF-8. Re-save it as UTF-8 in the app that created it, then import again.

Need help? Visit support

Are all subtitles too early or too late?

If every subtitle is offset by the same amount, use the free SRT time shift tool to move the whole file earlier or later, then import the adjusted SRT. The file is processed in your browser. If the offset changes during the video, adjust individual caption times instead.

Open your SRT and finish your video

Import subtitles from Files, edit them alongside your video, and export SRT or a captioned MP4.

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