Free Online Audio to Video Merger
Add Audio to Video Online Free
Merge Music & Sound Instantly
Easily add music to video, overlay sound effects, or merge audio to video files online for free. Supports MP3, WAV, AAC, OGG, and all major formats.
75K+ Creators
1M+ Videos Processed
All Audio Formats
4.8/5 Rating
Add Music to Video
Add background music, songs, or custom audio tracks to any video file
Add Sound to Video
Layer sound effects, voiceovers, or narration on top of your video
Instant Processing
Merge audio to video in seconds with no quality loss or watermarks
Powerful Features
Everything You Need to Add Audio to Video
Our free online tool makes it easy to add music to video, merge sound effects, and create professional-quality audio-video content in minutes.
Add Music to Video
Import any music file and seamlessly merge it with your video. Supports MP3, WAV, AAC, OGG, FLAC, and more. Perfect for adding background music to social media videos.
Add Sound Effects
Layer sound effects at precise timestamps in your video. Add whooshes, clicks, transitions, or any custom sound effect file to make your content more engaging.
Volume Control & Mixing
Fine-tune the volume of each audio track independently. Mix original video audio with new music, voiceovers, or sound effects for professional results.
Multiple Audio Tracks
Add multiple audio layers to a single video. Combine background music, voiceover narration, and sound effects all in one project with full control over each track.
Trim & Sync Audio
Trim your audio files to the exact length you need and sync them perfectly with your video timeline. Set custom start and end points for precise alignment.
HD Export with No Watermark
Export your merged audio-video file in full HD quality with no watermarks. Download in MP4, MOV, or WebM format optimized for any platform.
Add Music to Video
Import any music file and seamlessly merge it with your video. Supports MP3, WAV, AAC, OGG, FLAC, and more. Perfect for adding background music to social media videos.
Key Benefits:
All audio formats supported
Drag-and-drop upload
Music library included
Royalty-free tracks
How It Works
How to Add Audio to Video in 4 Easy Steps
Our free online tool lets you add music to video, merge voiceovers, or layer sound effects with just a few clicks. No software download or editing experience required.
Under 3 Minutes- Add audio to video in under 3 minutes
No Software Needed- Works entirely in your browser
100% Free- No hidden fees or watermarks
Step 1 • 30 seconds
Upload Your Video
Upload the video file you want to add audio to. We support all popular formats.
Support for MP4, MOV, AVI, WebM, MKV
Upload files up to 500MB (free) or 2GB (premium)
Drag and drop or browse to upload
Instant video preview after upload
Cloud import from Google Drive & Dropbox
Pro Tip
For best results, use high-quality source video files. Our tool preserves the original video quality during the merge process.
Upload Your Video in Action
Seamlessly add audio to your video
Step 1 of 4 • 30 seconds
Supported Formats
All Major Audio Formats Supported
Add any audio format to your video. Whether you have an MP3 song, WAV voiceover, or AAC podcast, our tool handles them all seamlessly.
MP3
Most popular audio format. Universal compatibility across all devices and platforms.
Lossy compression, small file sizesWAV
Uncompressed, lossless audio. Ideal for professional-quality sound and music production.
Lossless quality, larger file sizesAAC
Advanced Audio Coding. Better quality than MP3 at similar bitrates, used by Apple and YouTube.
High efficiency, great qualityOGG
Open-source audio format. Excellent compression with high quality, used in web and gaming.
Open source, web-friendlyFLAC
Free Lossless Audio Codec. Studio-quality audio with no data loss, perfect for audiophiles.
Lossless, studio qualityM4A
MPEG-4 Audio. Apple's preferred format with excellent quality for music and podcasts.
Apple ecosystem, high qualityCompatible Video Formats
Add audio to any of these popular video formats
MP4MOVAVIWebMMKVFLVWMV3GP
Complete Guide to Adding Audio to Video
Add Audio to Video Online
Adding audio to video is one of the most essential video editing tasks. Whether you need to add background music to a YouTube video, layer a voiceover on a tutorial, or merge custom sound effects into your social media reels, ReelsMakerAI provides a free online solution. Our tool processes your audio and video files in the cloud, so there is no software to install and no complex timeline to navigate. Simply upload, adjust, and export.
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How to Add Music to Video for Social Media
Social media videos with the right music get significantly more engagement. Our tool makes it easy to add music to video for TikTok, Instagram Reels, YouTube Shorts, and other platforms. Choose from trending tracks or upload your own audio files. The platform automatically optimizes your output for each social network's requirements, including aspect ratio, file size, and codec compatibility.
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Add Sound to Video Without Losing Quality
When you add sound to video with ReelsMakerAI, your original video quality is preserved. We use advanced encoding that merges audio tracks without re-compressing the video stream unnecessarily. Whether you are adding a voiceover narration, ambient sound effects, or a full music track, the output maintains HD resolution and crisp audio quality across all supported formats.
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Professional Audio-Video Merging Tools
ReelsMakerAI provides professional-grade audio to video merging capabilities that rival desktop editing software. Features include multi-track audio layering, independent volume controls, audio trimming, fade effects, and timeline synchronization. For creators who need more advanced audio processing, our audio converter tool offers format conversion, while our video trimmer helps you cut video to the perfect length before adding audio.
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Popular Ways to Add Audio to Video
Background Music
Add music to videos for YouTube, social media, or presentations. Layer royalty-free music or your own tracks behind your video content.
Voiceover & Narration
Record or upload voiceover audio and merge it with your video. Perfect for tutorials, explainers, and documentary-style content.
Podcast Video Creation
Combine your podcast audio with video footage or animated backgrounds to create engaging video podcasts for YouTube and social media.
Social Media Reels
Add trending audio, music, or custom sounds to your short-form videos for TikTok, Instagram Reels, and YouTube Shorts.
Related Tools You Might Need
Audio Converter
Need to convert your audio file before adding it to a video? Our free audio converter supports MP3, WAV, AAC, OGG, FLAC, and more. Convert between formats in seconds to ensure compatibility.
Video Trimmer
Trim your video to the perfect length before adding audio. Cut out unwanted sections, set precise start and end points, and create the ideal canvas for your audio overlay.
Text to Speech
Generate voiceover audio from text using AI text-to-speech technology. Create natural-sounding narration, then add the generated audio to your video with our merger tool.
Frequently Asked Questions
Everything You Need to Know About Adding Audio to Video
Get answers to the most common questions about adding music, sound effects, and voiceovers to your videos online.
Simply upload your video to ReelsMakerAI, then upload or select your audio file (MP3, WAV, AAC, or OGG). Adjust the timing and volume, then export your video with the new audio track merged in. The entire process takes less than 2 minutes and is completely free with no watermarks.
ReelsMakerAI supports all major audio formats including MP3, WAV, AAC, OGG, FLAC, WMA, and M4A. You can add music, voiceovers, sound effects, or any audio file to your video. We also support all popular video formats like MP4, MOV, AVI, WebM, and MKV.
Yes! You can mix multiple audio tracks together. Keep the original video audio and layer background music or sound effects on top, with independent volume controls for each track. This lets you create a professional audio mix with background music, voiceover, and original sound all balanced perfectly.
Free users can upload videos up to 500MB and audio files up to 50MB. Premium users get increased limits up to 2GB for video files. All common video and audio formats are supported, and our cloud processing handles even large files efficiently.
Yes, our built-in audio trimmer lets you select the exact portion of your audio file to use. You can set start and end points, adjust timing, and sync the audio perfectly with your video content. This is especially useful when you only need a specific section of a longer song or voiceover recording.
No. ReelsMakerAI preserves the original video quality when merging audio. Our advanced encoding process adds the audio track without unnecessarily re-compressing the video stream. Your exported video maintains full HD resolution with optimized compression for the best balance of quality and file size.
Absolutely! You can add trending music, custom audio, or voiceovers to videos optimized for TikTok, Instagram Reels, YouTube Shorts, Facebook, and other social media platforms. Our tool automatically formats the output for each platform's requirements including aspect ratio, file size, and codec compatibility.
Upload your video, then add multiple audio tracks at different timestamps on the timeline. You can position each sound effect, voiceover, or music clip at the exact moment you want it to play. Each track has independent volume controls, and you can preview the full mix before exporting.
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