Add Music to Your Video, Free and Online

Add music to video projects in minutes with EchoWave's free online editor. Upload your clip, add a song to a video by dropping in an MP3, WAV or other audio file, trim it to length, set the volume so it sits right against any dialogue, and export an HD MP4 ready for YouTube, TikTok or Instagram. It runs in your browser, so there is nothing to install and no account needed to start — a fast way to add background music for video projects like vlogs, ads, slideshows and promos.

Timing and volume: make the drop land

However you plan to put music on a video, from a quick vlog to a full montage, getting it to feel intentional rather than just present comes down to three controls:

• Trim the track: cut your song down to the length of your clip, or to just the section you want, a chorus, a drop or an intro, rather than uploading the whole file and hoping it fits.
• Set the volume: bring music down under any dialogue or voiceover so words stay clear, then bring it back up during quiet or visual-only sections. A level of roughly 15-25% under clear speech is a safe starting point.
• Position it on the timeline: drag the track left or right so a beat, drop or chorus lands exactly on a cut, a reveal or a key moment, instead of drifting in wherever the upload happened to start.

If you also need voiceovers, narration or sound effects layered in alongside the music, EchoWave's broader add audio to video tool handles all three on the same timeline.

The right size for Instagram, TikTok and YouTube

Adding music to a video is usually one of the last steps before you post, so it helps to export in the shape each platform expects:

• Instagram and TikTok (9:16 vertical): fills a phone screen for Reels, Stories and TikTok, where a strong music hook in the first second or two helps hold attention.
• YouTube (16:9 widescreen): the standard shape for regular uploads, vlogs and longer videos with a full soundtrack.
• Square posts (1:1): a safe fit for Instagram feed posts and Facebook, where the frame needs to work without cropping on either side.

Build the edit once, then export it again at a different aspect ratio for each platform, so the same track covers every channel without re-cutting the video.

Where to get music you can use

For music, you bring your own audio file — EchoWave's built-in stock library covers sound effects rather than full songs. In practice that means one of a few sources:

• Your own recordings: music you wrote or performed yourself, or audio you recorded on the spot. There's no licensing question at all.
• Properly licensed tracks: a royalty-free library or stock-music subscription you've paid for, used within the terms of that license.
• Creative Commons and free-use tracks: some artists release music under a Creative Commons license. Check what it actually allows, attribution, no commercial use, and so on, before you post.

A simple rule of thumb covers most of the confusion: if you didn't create the track and don't hold a license for it, don't post it publicly. Popular commercial songs are protected, and platforms like YouTube, Instagram and TikTok run automated matching that can mute, block or demonetize an upload that uses one without permission, whether or not the video makes money. This is general guidance rather than legal advice, so check the actual license terms that apply to your track before you publish.

Add music to part of a video

You don't have to score the whole thing. To add music to only part of a video, drop the track onto the timeline, then trim its start and end points so it plays across just the section you want, an intro, a montage, or one specific scene, leaving the rest of the video with its original sound or in silence. Add a short fade-in and fade-out at each edge so the music starts and stops cleanly instead of cutting in or out abruptly. The same trim-and-position controls work whether you're placing a few seconds under a title card or a full verse under a longer sequence.