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Private browser utility / Social & Creator

Picture-in-Picture Video Editor

Runs entirely in your browser - no upload, no sign-up.

Live workspaceLocal processing
Add a base video and a second video for the inset
1

Base video

This fills the final frame and supplies the audio.

2

Overlay video

This appears as the smaller moving inset.

Both videos and the finished MP4 stay in this browser tab. Nothing is uploaded.

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video overlay picture in picture / browser utility
01 / Overview

How do I make a picture-in-picture video?

A picture-in-picture video places one moving clip inside another. Choose a base video and an inset video, set the corner, size, margin, and start time, then export a finished MP4. Both source files are composited in your browser, so they are never uploaded or stored on a server.

02

How to use

  1. 01
    Choose the base video

    Add the video that should fill the finished frame and provide the audio track.

  2. 02
    Choose the overlay video

    Add the second moving clip that should appear as the smaller picture-in-picture inset.

  3. 03
    Place and time the inset

    Pick a corner, adjust its size and edge margin, then choose when it starts in the base video.

  4. 04
    Preview and export

    Play the composite preview, choose an export quality, then create and download the local MP4.

03

Who it's for

  • Tutorial creators can place a camera explanation over a screen recording without opening a full timeline editor.
  • Reaction channels can put a face-camera clip in one corner while keeping the original footage visible.
  • Product teams can combine a narrated demo with a presenter or device view for internal updates.
  • Teachers and coaches can add a signing, speaking, or demonstration inset to lesson footage.

This editor creates a real two-video composite rather than joining clips end to end. The base video fills the frame and supplies the finished soundtrack. The second video's picture is scaled into a corner, starts at your chosen point, and disappears when that clip ends.

The browser downloads a WebAssembly video engine only when you export. It decodes both local files and produces an H.264 MP4 with even frame dimensions for broad playback compatibility. No account, cloud project, or watermark is added.

FAQ

Are my videos uploaded to make the picture-in-picture effect?

No. The browser opens both videos as local file objects and sends them to a WebAssembly video engine running in the current tab. The engine files download on first use, but your source clips and finished MP4 are not uploaded to that server.

Is this picture-in-picture video editor free?

Yes. You can add two local videos, preview the placement, adjust size, margin, timing, and quality, then export and download an MP4 without an account, subscription, or watermark. Practical limits depend on your device memory and the length and resolution of the source files.

How large can the input videos be?

The editor uses a conservative per-file limit based on whether your device appears mobile or low-memory. Desktop browsers normally allow larger files than phones. Two long high-resolution videos can still require several times their compressed file size while decoding, so shorter clips are safer.

Which video's audio is used in the finished MP4?

The finished video keeps the optional audio track from the base video. The overlay video's audio is omitted to avoid two unsynchronized soundtracks playing together. If you need the second clip's sound, mix the audio separately before using it as the base track.

What happens if the overlay video is shorter than the base video?

The overlay starts at the timestamp you choose and disappears after its own final frame. The base video continues normally until it ends. Starting the inset later can place a short speaker response or reaction exactly where it belongs without trimming the main footage.

Can I overlay an image or logo instead of a video?

This page is designed for moving video on video. Use the Add Video Watermark tool for a logo, image, or text mark that should remain fixed on the footage. Keeping those jobs separate gives each workflow clearer controls and a more accurate preview.

Why can picture-in-picture export take time?

The browser must decode two video streams, resize every overlay frame, composite it onto the base, and encode a new H.264 file. High-resolution or long clips increase both processing time and memory use. The Compact quality setting and shorter source clips reduce the workload.