Timeline with layers
Stack video, images, text and audio on separate tracks. Trim, split and move clips, and undo any step with Ctrl+Z.
See the timeline →3D video editor · Windows · Android · Browser
Your next video
starts with one project.
Sequel Box is a 3D video editor that runs right in your browser. Layered timeline, click-to-add keyframes, 3D animation presets and 72 built-in sounds, with nothing to install. Prefer desktop or phone? Get the Windows app or the Android app.
What is Sequel Box?
Sequel Box (also written SequelBox) is a 3D video editor for Windows, Android and the browser. You import clips, images, audio and 3D models, animate them with one-click 3D presets or click-to-add keyframes, and export an MP4. It is free to try, and an AI agent can build and export a video for you through the Windows app. Read more about Sequel Box.
- What it is
- A 3D video editor with a layered timeline, click-to-add keyframes and one-click 3D presets
- Runs on
- Windows (installer or portable), Android, and Chrome, Edge or Safari in the browser
- Price
- Version 1.0.0 is free to try
- Exports
- MP4 at 24, 30 or 60 fps, plus any single frame as a PNG
- AI agents
- Claude, Cursor and other MCP apps can create and export a video through the Windows app
Cut, animate and export in one editor. Timeline, camera keyframes and 3D presets stay side by side, so nothing breaks your flow.
Cut it.
Animate it.
Sequel Box.
Everything on one canvas.
Nothing to hunt for.
Click-to-add keyframes
Keep clicking and keyframes add themselves. Adjust them later.
How keyframes work →Presets that turn
Cube turns, doors, fly-ins and loops in one click.
Browse 3D presets →72 built-in sounds
Name a layer “whoosh” and it gets one automatically.
Browse the sounds →Save and export
Keep a .sbox project, then export an MP4 at 24, 30 or 60 fps.
Projects and export →Ask an AI agent to make the video
Connect Claude, Cursor or any MCP agent to the desktop app and describe what you want. It builds the project in Sequel Box and exports the video for you.
How to connect →Five moves.
One click each.
Apply a preset to a clip, preview it on the canvas, then fine-tune it on the timeline. The editor’s library adds entrance, exit, emphasis, poster and scene animations.
See all five 3D presets →Cube turn
Flip between clips as if they sit on the faces of a cube.
Doors
Two halves swing open to reveal the next clip.
Fly-in
Slide a clip in from outside the frame with a spin.
Loop
Keep an element turning for the whole clip.
Camera orbit
Tumble a layer through space for a bold opener.
Less dragging.
More making.
One click. One keyframe.
Set a spacing once, then keep clicking. Each click adds the next keyframe, so you never drag the playhead. Fine-tune them after.
See how it works →Name it. It sounds.
Turn on Auto-apply, then name a layer “click”, “whoosh” or “pop”. The sound lands at its start and follows the layer.
Browse the sound library →Paste from Figma
Copy layers, press Ctrl+V.
3D models
Drop in GLB or GLTF and turn them in space.
Green & blue screen
Key out a green or blue backdrop.
Object tracking
Click an object and the camera follows it.
Social safe zones
See what Reels, TikTok and Shorts cover.
Pen, masks & blends
Draw shapes, clip layers, mix blend modes.
Colour grading
Looks, tone, vignette and split-tone.
Cut out objects
Press Q, click a person, and the cutout follows.
Extract audio
Split a video’s sound onto its own layer.
Import HTML
Turn a web page and its animation into layers.
Touch editor
Bottom toolbar and a fixed centre playhead.
Share sheet
On Android, save or send exports from the share sheet.
From files to finished video.
In three moves.
1
Import
Drop video, images and audio onto the timeline. Each file gets its own layer. Almost any format works.
2
Animate
Apply a 3D preset or set camera keyframes, then preview the move.
3
Export
Export an MP4, or save a .sbox project and finish later.
Made for the way you work.
Pick a starting point.
Free 3D video editor
Open it in your browser, nothing to install.
Learn more →Keyframe video editor
Click-to-add keyframes, no playhead dragging.
Learn more →AI video editor
Describe a video, an AI agent builds the MP4.
Learn more →Green screen and cutout
Remove a screen or cut out an object with one click.
Learn more →Social video sizes
Canvases and safe zones for TikTok, Reels and Shorts.
Learn more →Figma to video
Paste Figma layers and animate them in 3D.
Learn more →Frequently asked questions
Does Sequel Box work offline?
The 3D library, PDF import, MP4 export and object cutout are built in. Fonts and the video converter load from the internet on first use, so connect once before you start.
Why does Windows show SmartScreen?
The app isn’t code-signed yet. Choose More info, then Run anyway.
Can I open .sbox files with a double-click?
Yes, if you used the installer. The portable file doesn’t register file types.
Which video, image and audio formats can I import?
MP4, MOV, MKV, AVI, WMV, WebM and more, plus images, audio, PDF pages and GLB/GLTF 3D models. If your browser can’t play a video, Sequel Box converts it for you. See the full list on the features page.
How do click-to-add keyframes work?
Choose a spacing (0.25, 0.5, 1 or 2 seconds, or your own). Each click on a property’s keyframe button adds a keyframe one step after the last one, so you never drag the playhead. Adjust any keyframe afterwards. See how it works.
How does auto-apply sound work?
Turn on Auto-apply by name in the Sounds panel. A layer named click, whoosh or pop (or any sound or folder name) gets that sound at its start. Browse the sound library.
What does Sequel Box export?
MP4 video at 24, 30 or 60 fps, at full, 75% or 50% resolution. You can also save any single frame as a PNG.
Can an AI agent make videos in Sequel Box?
Yes, in the Windows desktop app. Turn on Connect AI agent…, add Sequel Box to Claude, Cursor or another MCP app, and the agent can create a project from your instructions and export the finished video. See the MCP page.