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 →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? Get 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.
Four pieces.
One editor.
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.
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.
Frequently asked questions
Does Sequel Box work offline?
Fonts, the 3D library and the video encoder 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.