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1CONVERTER - Free Online File Converter Logo1CONVERTER

The fastest and most secure file converter. Convert documents, images, videos, audio and more.

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Add Audio to Video Online Free

Add background music, voiceover, or custom audio tracks to your video files online for free. Supports MP4, AVI, MOV, and more.

How It Works

  1. 1

    Upload video

    Upload your video file.

  2. 2

    Upload audio

    Upload the audio track you want to add.

  3. 3

    Adjust settings

    Set volume levels and audio timing.

  4. 4

    Download video

    Download your video with the new audio track.

Key Features

  • Supports MP4, AVI, MOV, MKV, WebM and more
  • Real-time preview before processing
  • Batch processing for multiple files
  • Adjustable quality settings
  • Direct cloud storage upload
  • Lightning-fast processing engine

Why Choose Our Tool

✓Free, no registration required
✓Secure file processing
✓Works on all devices
✓No software installation needed
✓Fast processing speed
✓High-quality output
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🎵

Add Audio to Video Online

Add or replace audio in your videos. Upload music or voiceover to enhance your video.

📹 Video File

🎥

Drop video here

or click to browse

MP4, MOV, AVI, MKV, WebM

🎵 Audio File

🎵

Drop audio here

or click to browse

MP3, WAV, AAC, FLAC, OGG, M4A

🔄

Support all audio formats

Replace, mix, or add audio to your video

🎚️

Replace or mix options

Adjust mix balance for perfect sound

🎵

Volume adjustment

Support for all major audio formats

⚙️

Audio sync tools

Auto-sync audio length to video duration

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