Image to Sprite Sheet — Free PNG/JPG/WebP Atlas Packer

What This Tool Does

The Image to Sprite Sheet tool takes individual image files and arranges them into a single texture atlas — the standard format for sprite animation in game engines. This is the core Sprite Sheet Generator for walk cycles, attack animations, particle effects, and UI icon sheets.

Drag & drop — add PNG, JPG, or WebP files by dragging them in; no file picker required
Natural filename sorting — walk_2 sorts before walk_10, not after
Trim transparent borders — removes empty space from each frame; stores offset data in JSON
Padding & extrusion — add space between sprites and copy edge pixels to prevent GPU bleeding
Uniform cell mode — forces all cells to the same size for Unity Sprite Editor slicing
Power-of-two sizing — pads the atlas to powers of 2 (e.g., 256×256, 512×512) for GPU optimization
Animation preview — play your frames as a loop at any FPS before exporting

What It Does NOT Do

It does not draw or generate art — you provide the frames
It does not slice an existing sprite sheet (use Sprite Sheet Cutter instead)
It is not an AI sprite sheet generator — all frames must be provided manually
It does not handle animated GIFs (use GIF to Sprite Sheet instead)

Who Uses This Sprite Sheet Maker

Unity developers packing walk cycles for the Sprite Editor
Godot developers using TexturePacker JSON Hash import
Pixel artists exporting animation frames from Aseprite
Roblox developers building sprite sheet sequences

Layout Options

How frames are arranged in the final sprite sheet atlas.

GridEven rows & columns

HorizontalStrip left to right

VerticalStrip top to bottom

PackedMaxRects optimal fit

Settings

Columns 0 = auto

Padding 0 px

Extrude 0 px

Align Middle / Center

Trim transparent on

Uniform cell size off

Power of two off

How to Use Image to Sprite Sheet

Drop Your Frames

Drag PNG, JPG, or WebP files into the browser. They'll be sorted by filename automatically.

Configure Layout

Pick Grid/Horizontal/Vertical/Packed. Set columns, padding, trim, and extrude to taste.

Preview Animation

Play the loop at your target FPS to verify the animation looks right before exporting.

Export Atlas

Download PNG sprite sheet + TexturePacker JSON, or get everything in a ZIP file.

FAQ

Image to Sprite Sheet — FAQ

Unity doesn't natively read TexturePacker JSON. Instead, import the PNG, set it to Sprite mode, then use the Sprite Editor's Grid By Cell Size option. Enter your cell dimensions and Unity will slice the atlas automatically. Use the Uniform Cell Size option in this tool if you want consistent cell sizes.

Grid forces all cells to the same size, arranged in even rows and columns — ideal for Unity's Sprite Editor and any engine that needs predictable cell positions. Packed (MaxRects) places frames of different sizes into the smallest possible rectangle by filling gaps. Packed atlases are more efficient but won't work with engines that expect uniform grid slicing.

Yes, for production games. Power-of-two dimensions (256, 512, 1024, 2048) are more efficient on GPUs. Most modern engines handle non-power-of-two textures fine, but older mobile GPUs and some console hardware benefit from POT textures. Enable this option if you're targeting a broad range of devices.

Yes. You can keep dropping more image files after the initial pack. The atlas will re-layout automatically to include the new frames.

Image to Sprite Sheet Generator