VTT to MP4: How to Add or Convert VTT to MP4

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VTT to MP4: How to Add or Convert VTT to MP4

Last Updated: 2026. 03. 13

How do I add VTT subtitles to an MP4 video?

How to merge a .vtt file and a .MP 4 file?

How to convert VTT file to MP4?

As VTT is a popular subtitle format, most subtitles files you download from the web are in VTT format. With a downloaded VTT file, you might want to add it to an MP4 file for viewing or look for ways to convert it to an engaging MP4 video. That's what we talk about here - a guide on how to add or convert VTT file to MP4. Let's dive in right now!

Quick View of Contents

Part 1. Permanently Add or Convert VTT File to MP4 Online

Part 2. Add VTT File to MP4 with VLC Media Player

Part 3. Add VTT File to MP4 Using Happy Scribe

Part 4. Frequently Asked Questions

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Part 1. Permanently Add or Convert VTT File to MP4 Online

If you're looking for ways to embed VTT file into MP4 video permanently or need some professional, creative tools to convert VTT file to a captivating MP4 video, a versatile video editor called FlexClip will help you get out of trouble.

With FlexClip, you can directly upload both VTT and MP4 files and easily add VTT to MP4 in one click. Or recreate VTT file by converting VTT file into AI voices and combining the sound with one-of-a-kind storytelling image, soft background music or engaging text to make it accessible on video-hosting platform. Follow our step-by-step guide and add your VTT file to MP4..

Add VTT to MP4

Convert VTT to MP4

1) How to Add VTT File to MP4 in One Click

Since your VTT file contains subtitle number, content, timecode, etc., FlexClip can automatically transcribe it and add VTT to MP4 with subtitles perfectly synced to the timestamp. Just prepare your VTT and MP4 files and get started!

Add VTT to MP4

Step 1

Access FlexClip and upload your MP4 file from computer, Google Photos, Google Drive, One Drive, Dropbox or mobile phone. Then add or drag and drop your video to the timeline.

Upload Your MP4 File You'd Like to Add Subtitles to FlexClip

Step 2

Move to Subtitles> click Upload Subtitle File to add your VTT file, then FlexClip will automatically embed VTT subtitles into your MP4 file with text perfectly matched to the timecode of your MP4 video.

mport VTT File and Add VTT Subtitles to MP4

Step 3

Now you can customize the subtitle layout. Double-click one text, the toolbar will appear where you can adjust the subtitle style of font, size, color, opacity, background, alignment, or even text animation with ease. Don't worry about the rest subtitle as the new style will automatically be applied to all your subtitles.

Customize the Subtitle Layout as You Like

Step 4

Congrats! You're done with editing. Now you can tap Export button to save your MP4 video in 4K, 1080P, 720P resolution or directly share it to social media like YouTube. Or if you like, generate a clickable link to embed in email, blog and more places.

Export Edited MP4 Video and Save it as You Like

Bonus Tips for Fixing Out-of-Sync Subtitles:

Generally speaking, as long as the timestamps in the subtitle file perfectly match the video, you should now have a video where the subtitles are synchronized with the audio and visuals. But what if the timing is off? Don’t worry! FlexClip offers the following simple solutions:

If you notice only a few minor timing errors during your preview, you can manually adjust them in FlexClip. Simply update the timestamps while listening to the audio, FlexClip will automatically reposition the subtitles to match your visuals.

Manually Adjust Timestamp to Fix the Out of Sync Issue

If there are too many mistakes, manual editing to fix out-of-sync issue can be a time-consuming, heavy task. In this case, you can try FlexClip’s AI Subtitle Generator to automatically generate new subtitles from your MP4 video. With up to 95% accuracy rate and support of 140+ languages and dialects, you can easily generate new subtitles to replace the wrong one in seconds. Click the "AI Subtitle Generator" button below to try it out now!

Fix the Out of Sync Issue by Generating New Subtitles from MP4 Video with FlexClip's AI Subtitle Generator

AI Subtitle Generator

2) How to Convert VTT to MP4 Video

Aside from embedding VTT to MP4 video, with FlexClip's tons of AI tools, you can effortlessly convert imported VTT file into realistic AI voices, generate a series of images fitting your storyline and add creative sound effects & music to create a captivating MP4 video. Click Convert VTT to MP4 Video button below to get started.

Convert VTT to MP4 Video

Step 1

Firstly, click Subtitles > Upload Subtitle File to import your VTT file from computer. FlexClip will instantly open this file and load subtitles with timestamp on the screen.

Upload Your VTT File to FlexClip

Step 2

Tap Speech button and you'll instantly be navigated to the Subtitle to Speech tool. Here set up the voice language, voice style, avatar, speed and pitch to customize the AI voices of your further MP4 video as you like.

Convert VTT to MP4: Enable the Subtitle to Speech Feature

Want to repurpose your VTT subtitle file to generate an MP4 video in another language? FlexClip also gets you covered. Simply upload the VTT file to FlexClip, wait for the subtitles to load successfully, then click the "Translate" button at the top. Select your desired target language for the text and click "Translate." FlexClip will automatically translate your VTT subtitles into the chosen language. Afterward, click the "Speech" button to generate voice-over audio.

Translate VTT File to Another Language to Generate Voiceover for MP4 Video

Step 3

Let's do some setups for voice generation. Set the language, accent, avatar, tone style, speed, pitch for the generated voice and click on Generate to launch the process.

Convert VTT to MP4: Make Setting for the Voice

Step 4

Once the converted audio is added to the timeline, it's time to perfect your voice file with photos, images, text and transition effects. Here you can rely on AI-powered tools to craft video, music or image that perfectly fits your theme or directly select from FlexClip's royalty-free media stock, use AI image generator to generate crafted and original photos from your text or capture screen/webcam recording for MP4 video.

Convert VTT to MP4: Perfect the Audio with Visuals

Step 5

Once you're satisfied with the result, move to the Export panel to save the video as MP4.

Convert VTT to MP4: Export the Converted Video as MP4

Part 2. Add VTT File to MP4 with VLC Media Player

VLC Media Player is a good tool that provides a quick solution for adding VTT files to MP4 videos. What's more, it's compatible with a variety of video formats, which can be called the trump card for you to watch videos with subtitles. It's free and open source. You can use it to subtitle your MP4 videos on Windows, Mac and Linux computers without paying a dime.

How to add VTT files to MP4 with VLC Media Player

Before adding subtitles, make sure the files' name for the video and the VTT subtitle file is exactly the same or it won’t work.

Step 1

Download VLC Media Player and complete the installation.

Step 2

Load the video of interest to play with VLC. You can do this by loading your MP4 video from the computer or opening it with the VLC media player.

Step 3

Hit Subtitle panel > Add Subtitle File > use the file explorer to find the VTT file > select it. Now the subtitles appear on your screen.

Add VTT File to MP4 Video with VLC

Note

Remember the program would not add the subtitle files to the video, which means you will always have to keep the subtitle file if you need to view them.

Part 3. Add VTT File to MP4 Using Happy Scribe

Happy Scribe is a professional tool to add VTT file to MP4 videos in minutes. Except for that, this transcript editor also allows you to add other subtitle files to MP4 videos, including TXT, SRT, STL and more. Moreover, you can use the sharing feature to collaborate with all your stakeholders by sharing your transcripts and subtitles, no matter where they are in this world.

Full guide to add VTT file to MP4 online using Happy Scribe

Step 1

Use the link: https://www.happyscribe.com/subtitle-tools/add-vtt-to-mp4 to access Happy Scribe subtitle adder;

Step 2

Click on Select File to upload the MP4 video which you want to burn your subtitle file.

Step 3

Now it's time to load your VTT subtitle file by tapping on Select File again.

Step 4

Modify your subtitles by changing the color, font, and the position of your text.

Step 5

It will take a few minutes to render the MP4 video. After that, you can download it to your computer.

Add VTT File to MP4 Video with Happy Scribe

Part 4. Frequently Asked Questions

1.Why should I add VTT file to my MP4 file?

There are many reasons why you should burn your VTT file on the MP4 file. Firstly, many platforms don't allow you to edit the style of your subtitles. Moreover, some media platforms like Instagram do not accept VTT subtitle files, so hardcoding your VTT file to your MP4 file is a feasible way to make a video with subtitles.

2.How can I merge the VTT and MP4 file?

You can use some online subtitle editors like FlexClip to merge the VTT file and MP4 video effortlessly.

3.How do I make a VTT file?

You can create one using FlexClip's AI auto subtitle tool or by downloading them from YouTube Studio after auto-transcription.

4.Can I edit VTT files?

Absolutely! VTT files are text-based and can be edited by using a video editor like FlexClip.

The Bottom Line

That's all for how to add VTT file to MP4 video. If you need to hardcode subtitles into videos, try the above free ways!

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Bella /

Full of vitality, curiosity and hope, Bella is an energetic copywriter at FlexClip. She mainly concentrates on video creation and troublesome issues related to video editing, providing users with practical solutions and tricks. Personally, Bella loves novels, sci-fi movies, cooking and travel. And, she believes that all her life is the best arrangement from God.