Choosing the music
The Soundtrack menu offers four routes, and none of them sends your audio anywhere. No music gives you a silent slideshow. Soft ambient tone and Warm pulse are generated inside the browser with the Web Audio API, so no audio file is downloaded and there is no track to license. Upload my audio lets you use a file you already own; it is read locally and loops to cover the length of the video.
Mixing the sound
The volume slider runs from 0 to 100 and starts at 55. It scales the music before the audio is mixed into the recording, which is useful when the pictures will later sit under a voice-over. Audio is combined inside the page while the canvas is being recorded, so no music service is involved and nothing is stored remotely.
Timing the pictures to the track
Each photo has its own duration between 1 and 30 seconds, in half-second steps. If your track has a clear ending, adjust the last image so the picture and the music stop together. The preview reflects the same order and framing used for the export, so you can check the pacing before you commit to a render.
What you download
A 1280 × 720 landscape clip at 30 frames per second, with your chosen audio already mixed in. Chrome and Edge produce WebM; browsers that support MP4 recording produce MP4. The file arrives without a watermark and without an export charge.
Related pages
The create video from photos page walks through the whole flow step by step, and photo to video covers what the converter does with your images.