UseFreeTools

Picture-in-Picture Video Composer

Place a timed inset video over a short base clip and choose one source for the output sound.

Files stay on your device No sign-up Free to use
How this works

The tool runs in this browser. Your file or text is not uploaded to UseFreeTools. Check this tool's limits for anything it may save on your device.

Privacy details

Drop your file here

or choose one from your device

Base video: the full-size background clip. One browser-decodable MP4/MOV or WebM, one video track and at most one audio track. Total selected media up to 256 MiB; video up to 60 minutes and 8.3 megapixels.

    Drop your file here

    or choose one from your device

    Inset video: the smaller clip placed over the base. One browser-decodable MP4/MOV or WebM, one video track and at most one audio track. Total selected media up to 256 MiB; video up to 60 minutes and 8.3 megapixels.

      How to use Picture-in-Picture Video Composer

      1. Choose the base video and the inset video.
      2. Set their source starts, output length and when the inset enters the output.
      3. Choose inset width, corner, fit and the single sound source.
      4. Render and watch the inset entry and ending before keeping the WebM.

      Example: Picture-in-Picture Video Composer

      Show a delayed inset in the lower-right corner.

      You add
      Two two-second, 640 × 360 silent videos. Base start: 0; duration: 2; inset start: 0; inset offset: 0.5; width: 35%; position: bottom-right; fit: Keep full inset frame; sound: No audio track.
      You get
      The output keeps the base dimensions. The inset appears around 0.5 output seconds at the chosen corner; the recorded WebM has no audio track.

      Options

      Inset width and fit
      Width is a percentage of the base output. Keep full inset frame preserves the full picture; Crop inset to fill can cut its edges.
      Sound source
      Choose one source only. A chosen source without an audio track is refused; selecting No audio track makes a silent output.

      Supported inputs and limits

      Selected files256 MiB total
      Supported duration120 source seconds
      Two browser-decodable MP4/MOV-family or WebM sources, up to 256 MiB together, 60 minutes per source and 4K source frames. Select a base segment up to 10 minutes. WebM export must fit 128 MiB and 1080p. Output duration must fit the base segment; only the chosen sound source is retained. Recording runs in real time; keep the page visible and review the result. No multi-layer timeline, audio mixing, MP4 export or metadata preservation.

      Where your input is processed

      This tool processes your input in this browser. Your text and files are not uploaded to UseFreeTools. Check this tool's limits for anything it may save on your device.

      Contain and cover handle different shapes

      Keep full inset frame preserves its image proportions inside the inset area. Crop inset to fill can remove content at its edges. Check faces, labels and screen text in the recorded result; a percentage width is a layout setting, not a guarantee of readable detail.

      Inset sound follows its entry

      Choosing inset audio uses its source segment and output entry offset. The base audio is then omitted. If you need both sources, this composer does not sum them; prepare the intended soundtrack separately and review its timing.

      Questions about Picture-in-Picture Video Composer

      Can this mix both video soundtracks?

      No. Choose base sound, inset sound or no audio track.

      Can I preserve every edge of the inset?

      Choose Keep full inset frame. Crop inset to fill can remove material at its edges when the shapes differ.

      Is my input uploaded?

      Nothing is uploaded.

      Project manager: Tony Hines · Content updated 4 October 2026 · Report a problem

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