NeoCutIAMNEOFICIAL
Open editor ↗

Practical editing · Phone & desktop

How to Add Music to a Video Online

Give your video a separate soundtrack that you can move and trim without cutting the picture. Start with a video and a music file you have permission to use.

Open NeoCut and follow along ↗

Add and align your soundtrack

  1. Import the picture.Use the plus button in a video row to select a video from your device. Its original sound stays with the video.
  2. Add your music to an Audio row.Choose the plus button in an empty audio row and select your soundtrack. If you need another row, choose Track, then Audio track. WAV or MP3 is a useful starting point; decoding other formats depends on the browser.
  3. Choose when the music begins.Drag the audio clip's body along the timeline. On a phone, touch and hold before moving it. Use the end handles to trim; the small volume control adjusts loudness rather than moving the clip.
  4. Check the edit at the right scale.Pinch the timeline on a phone, or use the bottom navigator on desktop. Zoom in to align an entrance, then zoom out to check the soundtrack against the whole video.

Avoid two soundtracks fighting each other

Select the video and choose Mute if you want only the imported music. Select the standalone audio clip and use its own Mute button to compare the edit without that soundtrack. Choose Unmute to bring it back.

Open Volume to balance each clip. New imports start at 100%, which means the original gain, not a measurement of how loud the recording is. Two recordings at 100% can still sound very different.

On desktop, audio commands sit in the Audio section of the bottom command bar. On mobile, swipe the selected clip's command bar to find them.

Check the ending, then save and export

Play across every cut and listen to the end. A soundtrack extending beyond the picture also extends the project: trim it if you do not want an audio-only ending. Save a portable backup with Project settings → Save project + media.

Choose Export for an MP4. Basic import, trimming, volume and Mute are included in Free, along with 720p export without a watermark. Pro adds higher resolutions on supported devices and advanced sound tools. See the Free and Pro comparison.

Music rights still apply to the finished video. For tracks from the included library, check the source and licence details.