Flipbook Maker: Pack & Split VFX Sprite Sheets and Texture Atlases
A free, browser-based flipbook maker for game and motion VFX. Pack a sequence of image frames into a single sprite sheet (texture atlas), or split an existing sprite sheet back into individual frames. Everything runs locally in your browser and exports clean, engine-ready assets for Unreal Engine, Unity, Godot, and custom shaders — no uploads, no sign-up.
Two tools in one
Pack frames → sheet
Drop your animation frames, arrange them on an auto or custom grid, fine-tune each frame’s position, preview the animation, and export an alpha-preserving sprite sheet plus JSON metadata.
Split sheet → cards
Drop an existing sprite sheet or texture atlas and slice it back into individual frames by grid or cell size. Trim, skip empty cells, download all as a ZIP, or send the cards straight to Pack to rebuild a flipbook.
What is a flipbook in game VFX?
In real-time graphics, a flipbook (also called a sprite sheet, SubUV texture, or flipbook animation) is a single image divided into a grid of frames. Instead of streaming dozens of separate files, the GPU samples one texture and advances the UV coordinates each frame to create smooth animation. It is the standard, efficient way to render fire, smoke, explosions, splashes, and stylized effects — one draw, one texture.
A flipbook maker automates the tedious part: arranging frames into a perfectly aligned grid (a texture atlas), padding cells, and exporting an engine-ready sheet at the right resolution — or doing the reverse and slicing a finished atlas back into its frames.
How to make a flipbook in 3 steps
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1
Add your frames
Drag and drop your image sequence (PNG, JPG, WebP, or SVG). Frames order by filename — drag thumbnails to reorder.
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2
Set the grid
Choose columns and rows or enable auto grid. Add padding, snap to power-of-two, and nudge any frame within its cell.
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3
Preview & export
Play the animated preview, set FPS, then export an alpha-preserving PNG plus JSON metadata for your engine.
Features
- Pack & Split modes — build a sheet, or slice one back into frames.
- Auto or manual grid — square-ish auto layout, or set columns and rows.
- Per-frame nudge — drag a frame inside its cell with rule-of-thirds guides.
- Power-of-two snap — round output up to GPU-friendly POT sizes.
- Padding, offset & spacing — handle gutters and margins precisely.
- Trim & skip empty — crop transparent edges and drop blank cells when splitting.
- Premultiplied alpha — export straight or premultiplied for UE / Unity.
- Animated preview — play the flipbook with an adjustable FPS slider.
- PNG, JSON & ZIP export — sheet PNG, metadata JSON, or all cards in one ZIP.
- Private & free — runs in your browser; images never leave your device.
What can you build with it?
| Use case | Examples |
|---|---|
| Particle & VFX flipbooks | Fire, smoke, explosions, magic, sparks |
| Engine SubUV textures | Unreal Engine Niagara / Cascade flipbooks |
| Sprite sheet animations | Unity, Godot, 2D game sprites |
| Unpacking atlases | Slice a downloaded sheet back into editable frames |
| Shader-driven FX | UV-scrolled flipbook materials |
| Motion design assets | Looping animated textures for real-time scenes |
Need a custom or automated VFX pipeline?
Packing one flipbook is quick. Batch-processing hundreds of effects — normalizing sizes, slicing atlases, and exporting sheets on a schedule — is where studios lose real time. Kick-Start.ai builds intelligent automation systems that wire this into your content pipeline so assets get processed and delivered automatically.
Frequently asked questions
What is a flipbook maker?
A flipbook maker packs a sequence of image frames into a single sprite sheet (texture atlas) arranged in a grid, so game engines and shaders can play the animation by scrolling through the frames.
Can it split an existing sprite sheet into frames?
Yes. Split mode loads a sprite sheet or texture atlas and slices it back into individual cards by grid (columns × rows) or cell size, with offset, spacing, trim, and skip-empty options. Download each card, all cards as a ZIP, or slice metadata as JSON — or send the cards to Pack to rebuild a flipbook.
Is a flipbook the same as a sprite sheet?
Essentially yes. In game VFX, “flipbook,” “sprite sheet,” and “SubUV texture” all refer to a grid of animation frames stored in one image and played in sequence.
Which engines does the output work with?
The exported sheet works with Unreal Engine (SubUV / flipbook), Unity sprite animation, Godot, and any custom UV-scrolling shader.
What image formats can I import?
PNG, JPG, WebP, and SVG, including transparency (alpha) for PNG and WebP.
Can it make power-of-two texture atlases?
Yes. Enable “Snap output to power-of-two” and the output sheet is rounded up to the next power-of-two dimensions for GPU efficiency.
Does it support premultiplied alpha?
Yes. Toggle premultiplied alpha on export for engines like Unreal Engine and Unity that expect it; otherwise it exports straight (un-premultiplied) alpha.
Is it free, and are my images uploaded?
It is free to use and runs entirely in your browser. Your images are processed locally and never leave your device.