Add Audio to MP4 Videos

Whether you're creating a podcast, a presentation, or a social media post, you need a quick and easy way to add audio to video without complex software. Our AI-powered tool makes it simple to merge an audio track with your MP4 video in just a few clicks. Upload your files, adjust your settings, and get a perfectly synchronized video with high-quality audio, every time.

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AI Dubbing
AI Subtitle
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Voice Changer
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Voice Cloning

Seamless AI voice dubbing in multiple languages to create perfect voice dubs that sound just like you, in any language.

Auto-generate accurate, time-synced AI subtitles in any language, fast and hassle-free.

Instantly convert written text to high-quality voice with text to speech, real human voices made with AI.

Clone voices with stunning accuracy to create personalized audio at scale. No voice actors needed.

Turn one video into multiple scroll-stopping clips using the AI Clip Generator.

Turn your script into ready-to-share videos with visuals, voice, and subtitles with AI video generator.

Transform any voice with Wavel’s AI voice changer realistic, expressive, and customizable in any style or accent.

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Build a Celebrated AI Voice Brand – Trusted by Industry Leaders!
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AI Video Generator by Wavel AI - Create stunning multi-style videos with single input | Product Hunt Wavel AI - Most realistic and natural AI voiceover & dubbing for videos | Product Hunt

The platform is easy to use and helps me with the translation of articles and video subtitles for social media. We use it daily to assist us in dubbing videos for our clients without needing to record a new video every time we serve a client from a different country.

wavel

Daniel Zaitzow

Spearheading Ops at ContentBlocks

Why Choose Our AI Tool to Add Audio to Video?

Get Started

Tired of clunky video editing software or confusing online tools? Our platform simplifies the process of adding audio to any MP4 video. No technical skills are needed just a few simple steps to achieve professional results. You can easily replace existing audio, add background music, or incorporate voiceovers to enhance your video content. Our tool is designed for speed and simplicity, so you can focus on creating great content without the hassle. It's the perfect solution for anyone who needs to quickly and efficiently ai text to speech tool.

Effortless Features Designed for You

Seamless Merging

Our AI ensures that your new audio track is perfectly synchronized with your video. Say goodbye to frustrating manual adjustments and enjoy a smooth, professional result every time.

Voices

Your All-in-One AI Studio for Video & Audio Creation

Built for creators, teams, and global brands ready to scale.

Jump between video, voice, and script tools without missing a beat.

Cut production time, keep every ounce of creative control.

High-Quality Audio

Maintain the integrity of your sound with our advanced processing. Whether you're adding music, a voiceover, or sound effects, the final output will sound crisp and clear.

Voices

Easy to Use Interface

Our user-friendly interface is designed for everyone, from beginners to experienced creators. Drag and drop your files, make a few quick edits, and you're ready to go.

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Multiple Audio Formats

We support a wide range of audio formats, including MP3, WAV, and M4A, giving you the flexibility to use any audio file you have.

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How to Add Audio to MP4 Videos in 3 Simple Steps

Upload Your Video Files

Simply drag and drop your MP4 video and your audio file into our tool.

Adjust & Sync

Our intuitive timeline lets you easily align your audio with the video, trim tracks, and adjust the volume.

Export & Share

Once you’re happy with the result, export your new video. It's ready to share on any platform.

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Curated for every use case

Social Media Creators

Enhance your Reels, TikToks, and YouTube Shorts with the perfect soundtrack. Quickly add trending music, custom voiceovers, or sound effects to make your content more engaging. With our tool, you can create a professional-quality video in minutes, allowing you to keep up with the fast-paced world of social media. The simple drag-and-drop interface and quick processing ensure that your videos are ready to post without delay, giving you more time to focus on your content strategy and audience engagement.

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Voices

Enhance Marketing Audio for Videos

Create compelling ad campaigns and promotional videos by adding professional voiceovers or background music. Our tool lets you quickly iterate on video content without the need for a dedicated video editor. Easily replace existing audio with a new script from your latest campaign, ensuring your message is always clear and on-brand. Whether you're creating a product demo or an explainer video, you can count on our tool to produce a polished final product that captivates your audience.

Enhance Online Lessons

Enhance online lessons and tutorials by adding clear, high-quality audio explanations. Easily combine video lectures with supplemental audio tracks or replace background noise with a professionally recorded voiceover. You can use our tool to seamlessly create instructional content that is engaging and easy for students to follow. This is also a great solution for creating videos with dubbed audio for multilingual classrooms, ensuring every student has access to the information.

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Why Choose Our AI Tool to Add Audio to Video?

Get Started

Add Audio to Any Video in Seconds

Frequently Asked Questions

Is this tool free to use? wavel
We offer a free tier that allows you to add audio to video for a limited number of projects. For more advanced features and unlimited exports, we offer paid plans.
What file formats are supported? wavel
Our tool supports a wide range of video and audio formats. For video, we primarily support MP4, while for audio, we support MP3, WAV, and M4A.
Do I need to download any software? wavel
No, our tool is completely browser-based. You can access it from any device with an internet connection without downloading or installing any software.
How do I ensure the audio and video are perfectly synced? wavel
Our intuitive timeline feature allows you to visually align your audio track with the video, making it easy to achieve perfect synchronization.
What is the maximum file size I can upload? wavel
The maximum file size depends on your plan. Our free plan has a smaller limit, while our premium plans offer larger file size limits for more extensive projects.
Can I replace the existing audio in my video? wavel
Yes, our tool allows you to easily replace the original audio track in your MP4 video with a new one.
Can I add multiple audio tracks to a single video? wavel
Currently, our tool is designed to combine one audio track with one video file. For multi-track editing, we recommend using more advanced desktop software.
What if my audio file is shorter than my video? wavel
You can either loop the audio to match the video length or trim the video to fit the audio using our in-browser editor.
Can I adjust the volume of the audio track? wavel
Yes, our editor includes a volume control feature, allowing you to increase or decrease the volume of your added audio.
Do I have to worry about copyright when adding music? wavel
Yes, it is crucial to use royalty-free music or tracks for which you have the proper licenses to avoid copyright issues.
Is there a watermark on the final video? wavel
Final videos exported on our free plan will include a small watermark. Our paid plans allow you to export videos without a watermark.
How does the AI enhance the process? wavel
Our AI helps streamline the merging process, ensuring high-quality output and perfect synchronization, so you don’t have to spend hours on manual adjustments. It also helps in identifying key moments in the video to suggest optimal audio placements.

Need Extra Reasons to Love Wavel AI?

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For Sales Teams

Create pitch-perfect video demos, walkthroughs, and personalized outreach — all from one place. Sell smarter, not harder.

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For E-Learning Platforms

Create immersive, multilingual learning experiences at scale. From voiceovers to subtitles — all in one tool.

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For Marketers

Run campaigns faster with AI-powered video ads, social clips, and repurposed content — no jumping between tools.

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For HR Teams

Onboard, train, and engage employees with AI-powered video content — no editing expertise required.

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For Educators

Record, dub, subtitle, and share lessons in minutes. Teach more effectively with zero tech hassle.

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Short Clips

Create bite-sized video snippets in a click

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For Customer Support

Turn FAQs into explainer videos, localize them with voiceovers and subtitles, and reduce ticket load effortlessly.

Hear From Our Community

Listen to what real users love about Wavel AI straight from the Wavel Community.

Anna P.

Anna P.

Senior Social Media Manager

Wave AI is truly a remarkable company that has revolutionized the way we perceive voices and language solutions. Their comprehensive approach, which encompasses a wide array of language solutions under one roof, is nothing short of impressive. With a strong focus on the positive aspects of our voices, Wave AI has brought a refreshing perspective to the industry. Their commitment to innovation and excellence is evident in every aspect of their work. It's a pleasure to partner with a company that embodies such a forward-thinking and customer-centric approach.

Slashdot Rating
Rated 5/5
View review
Stephen H.

Stephen H.

Marketing

As a content creator, I've always sought innovative tools to enhance the quality and impact of my work, and Wavel AI has quickly become my go-to choice for voiceovers. With a library spanning over 250 voices and supporting more than 40 languages, I've been able to cater to a global audience effortlessly. Tutorial videos and chat bot also really prompt to help.

Slashdot Rating
Rated 4/5
View review
Salim L.

Salim L.

Manager

The option to Collab is amazing because as a content creator, collaborations are quite frequent. Different team members are able to view and edit files, work on the same content concurrently, and share inputs, allowing for true real-time collaboration. You don't have to individually notify anyone. They will get to know your activity which cuts down extra time.

Slashdot Rating
Rated 5/5
View review
Chiranjeevi n.

Chiranjeevi n.

Growth Marketer

I was happy with its realistic AI voiceovers, their support during problems and multilingual support as well which makes it an ideal tool for content creators like us who need a high quality voice generation for work or use and its ease of use, implement and integration was a cherry on top.

G2 Rating
Rated 4.5/5
View review
Peter M.

Peter M.

Graphic Designer

The voice cloning ability is one of its outstanding ones in Wavel.ai. It can mimic the voice of a person with such precision that it can accurately reflect the tonal variations as well as the impassioned modulation of a person. The speed and the performance of the tool in processing audios are also good; very time-saving for the content producers.

G2 Rating
Rated 5/5
View review
Keegan D.

Keegan D.

Video Editor

As a video editor i need many audios for my video and also i have to perform some editing with dubbing or subtitle related part and here WavelAi solve my approx all problem in just a minutes.

G2 Rating
Rated 5/5
View review
Matt Han

Matt Han

IT Company Marketer

Wave AI is truly amazing! One of its most impressive features is the Voice Cloning function. This function allows you to create long-hour video content with authentic voices that do not require human interpretation. You can even include the voice of your favorite singer powered by AI.

Product Hunt Rating
Rated 5/5
View review
Roberto Gómez

Roberto Gómez

Co-founder

Really cool tool. I run an international company and I have thought about new use cases in order to generate content for my audiences. It works really well and looking forward to the evolution of this technology.

Product Hunt Rating
Rated 5/5
View review
Alex Fall

Alex Fall

AI enthusiast and Product Manager

You can fine-tune the audio output to meet your specific needs, whether you want to adjust the voice speed, tone, or volume. This level of control is especially useful if you're creating audio content for a particular audience. When it comes to audio output quality, Wavel AI is outstanding.

Product Hunt Rating
Rated 5/5
View review