Free Add Audio to Video

It’s a tool that combines a video with a separate sound file such as music, a voiceover or sound effects. This one mixes the new track with the video’s own sound at the volumes you choose and exports a single MP4, all inside your browser.

1. Click Choose files and pick your video. 2. Click Choose music or voiceover and pick the audio file. 3. Set Original volume (%) and Music volume (%). 4. Click Create file, then click Download.

Yes. Both tracks are mixed, so leave Original volume above 0% and set Music volume lower, often 20–40% under speech. Set Original volume to 0% if you want the added file to replace the video’s sound completely.

The finished MP4 always matches the main video’s length. A shorter track loops from the start until the video ends, and a longer one is cut off when the video ends. There’s no fade-out, so the music may stop abruptly.

No. The added track always starts at 0:00 of the video. To bring the music in later or use one part of a song, trim the audio file first and then add it here.

Yes, it’s free and you don’t need an account. SocQ adds no watermark or logo to the exported video; the only change is the audio mix you set.

No. The mixing runs with FFmpeg compiled for the browser, so your files are read and processed on your device and aren’t sent to SocQ’s servers. Your browser fetches the video engine on the first run and reuses the cached copy afterward.

You can use common video files such as MP4, WebM, MOV, MKV and AVI, plus audio files like MP3, WAV and M4A. Each file can be up to 100 MB, both files together up to 200 MB, and the video up to 10 minutes. The result is an H.264 MP4 with AAC audio.

Yes. The tool works in current mobile browsers on iPhone and Android, and you can pick files from your photo library or Files app. Processing happens on the phone itself, so it’s slower than on a computer; keep the tab open until the download appears.

The tool only mixes files already on your device; it has no music library and can’t pull audio from links. Use music you own or have a license for, because platforms may mute or remove videos with unlicensed songs.