Add SRT to MP4 Online — Free & Fast Subtitles

Add SRT to MP4 in Three Steps

01
Sign Up and Upload Your Video
Sign up for Descript and open a new project. Drag and drop your MP4, and transcription begins automatically. This helps you add SRT subtitles without extra steps.
02
Export Subtitles from Underlord
After transcription is done, open "Underlord," search for "Subtitles," and pick "Export Subtitles." This creates an SRT file that you can quickly add to your MP4. Your content becomes more inclusive for everyone.
03
Choose Subtitle Format and Verify MP4 Extension
In the 'Subtitles' tab, pick your preferred subtitle format. Confirm that the exported file name ends with the correct MP4 extension to avoid compatibility issues. This step helps the subtitles integrate with your video.

Add SRT Subtitles to MP4 Videos Effortlessly

Fast, accurate AI transcription that learns how you talk
Descript's quick AI transcription fits your speaking style, making it simple to add SRT to MP4 files. Subtitles stay accurate and reflect your unique tone, increasing engagement.
Generate subtitle files with speaker labels & time codes
Enhance MP4 videos with accurate subtitles using Descript. Generate files complete with speaker labels and time codes for clarity. This approach supports adding SRT files quickly, making content more inclusive.
Always auto-synced captions
Descript's automatic captions keep your SRT files aligned with your MP4 videos. This saves you time and provides consistent playback.

More than a Subtitle Adder

Descript is an AI-powered audio and video editing tool that lets you edit podcasts and videos like a doc.

Captions & subtitles
Effortlessly add SRT to MP4 with Descript's Captions & Subtitles feature. Your videos become more accessible and keep viewers interested.
Transcription
Easily transcribe your videos to add SRT to MP4. This increases accessibility and viewer engagement using Descript's powerful transcription feature.
Video editing
Effortlessly edit videos and add SRT to MP4 files, making your content more accessible and appealing to everyone.
Publishing
Effortlessly publish MP4 videos with SRT subtitles, creating content that’s accessible and engaging for all.

Don’t just take our word for it

With a 4.6-out-of-5-star rating and a bunch of distinctions on G2, Descript’s users have declared it an industry standard in the video and podcasting world.

2025

Best Software

Video Editing

Text to Speech

Screen and Video Capture

“With Descript I'll be able to at least double my content output since editing is taking one-quarter the time it used to.”

Donna B.

“With Descript we can create videos for our YouTube channel and our LinkedIn page much faster and with high quality.”

Balázs N.

“Descript has made cleaning up and creating my educational videos into professional presentations [possible] without needing extensive technical computer skills.”

Barbara C.

“Descript makes recording and editing audio and video a breeze. It's advanced features have streamlined my workflows, saving me a lot of time usually spent editing.”

Roderick F.

“The collaborative tools streamline teamwork, allowing my team and me to work efficiently together on projects. Overall, Descript enhances productivity and simplifies the editing process.”

Aldrich M.

“Transcription based editing makes the process much faster…All in all, a must have editor for most audiences, especially in SaaS marketing.”

Nidhin M.

Surely there’s one for you

Free

no credit card required

Start your journey with text-based editing

Get started

1 transcription hour / month

Export 720p, with watermarks

Limited trial of Basic AI Actions

Limited trial of AI Speech

Hobbyist

$16

per person / month, billed annually

Elevate your projects, watermark-free

Get started

10 transcription hours / month

Export 1080p, watermark-free

20 uses / month of Basic AI Actions suite including Filler Word Removal, Studio Sound, Draft Show Notes, Create Clips, and more

30 minutes / month of AI speech with stock AI speakers and custom voice clones

5 minutes / month of avatars

Questions? We have answers

What formats of SRT files are supported by the tool for adding to MP4 videos?
The tool works with standard SRT files in UTF-8. This setup keeps everything consistent when adding subtitles to MP4 and avoids compatibility issues.
Can I customize the appearance of the subtitles when using the tool to add SRT to MP4?
Yes, you can adjust the style of your subtitles when adding SRT to MP4. You can change the font, size, color, and position to match your preferences and enhance your video's look.
What pricing plans does Descript offer for individual users and teams?
Descript has a range of plans for individuals and teams. Individual plans include a no-cost tier and a Pro plan, while teams can choose the Enterprise plan with advanced features. For more details, visit https://www.descript.com/pricing.
Does Descript provide any collaboration features for team projects?
Yes, team members can work together by editing, commenting, and sharing files at the same time. This approach simplifies communication and helps everyone stay on track.