Add Subtitles to MP4 Online

Create subtitles or captions for your MP4 video

Add Subtitles to MP4

Use as a Converter

Before saving your movie with subtitles, you can convert it to any desired format like MP4, MKV, AVI, MOV, and others.

Options to Choose from

You can decide how to add subtitles to your video: manually or with an SRT subtitle file. In any case, you can edit them then.

Edit Subtitle Font

We don't limit you! Select a font, its size, align the text. Also, choose its color and background to make the subs look brighter and seen on both black and white.

Add captions to MP4

MP4 has become the standard format for video distribution and playback across many platforms, including online streaming sites, social media platforms, video-sharing websites, and digital video players. Its popularity stems from its efficient compression, broad compatibility, and ability to contain multiple media components within a single file.

With this format widely used, adding captions to MP4 files is also common. It ensures the content becomes more accessible, inclusive, and user-friendly, accommodating a wider audience with different needs and preferences.

When it comes to subtitles, an SRT (SubRip Subtitle) file format is the most simple to create. It can be done manually in the text editor or by using our automatic subtitle generator to create and add an SRT to an MP4 video. It’s free to use and works on Mac, Windows, iPhone, and Android.

With our tool, you can make subtitles from scratch or generate text automatically. It also allows you to download the SRT separately if you don’t want the text to be permanently seen without an option to turn it off.

How to add subtitles to MP4 file online

Need help?
Upload an MP4 file
Add your video to our subtitle generator from your device or cloud storage. Click "Add manually" to create subtitles from scratch. And if you want the tool to make them, select "Auto subtitles". You can also upload an SRT file.
Add subtitles
When subtitles are made or generated, you can edit and correct them right away. Customize the subtitles as you need, adjust their position and alignment, and change their font and background settings. Alternatively, you can select one of the predefined styles.
Save your video with subtitles
Click "↓ SRT" to have the file with subtitles separately. Then, export your video with generated subtitles embedded into it and download it to your device or cloud storage.
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Get Clideo Video Editor App for iPhone

Download the Clideo Video Editor App to your iPhone to create your own video and edit it in any way: combine video, images, text, and music in the multi-track timeline.

Ready to add subtitles to your video?
Let's do it with our online subtitle editor!