Sprite Sheet Generator

About This Tool

Pack individual images into an optimized sprite sheet — one PNG plus CSS coordinates — the classic technique for cutting HTTP requests in games, icons and animations. Drop your frames or icons, choose packing direction and spacing, and get the sheet plus ready-to-paste CSS background positions. Everything is computed locally; packing respects your order (or auto-packs by size) with configurable gutters to prevent bleeding.

How to Use This Tool

1. Drop the frames/icons (same format recommended; transparency kept for PNG).
2. Choose layout: horizontal strip, vertical strip or grid — games usually want horizontal for animation frames.
3. Set the gutter (2-4 px prevents anti-aliased edge bleeding).
4. Generate: the sheet previews with a per-sprite coordinate table.
5. Download the sheet and copy the generated CSS — each class sets background-position for its sprite.

Advantages & Use Cases

Build a walking-cycle strip from character frames for a canvas game, pack 20 UI icons into one sheet for a fast legacy-style website, or prepare email-safe image strips. Pixel artists pack animation frames at exact 32×32 or 64×64 cell sizes.

Supported Formats & Recommendations

• PNG with alpha for icons and game sprites; JPG only if every cell is a full photo (no transparency).
• Keep all frames the same size for animation strips — the tool pads smaller ones to the largest cell.
• Even gutters matter: without them, neighboring sprites bleed 1 px at scaled rendering.

How We Test This Tool

Validation packs 12 sprites of mixed sizes and verifies every CSS coordinate against pixel-sampled positions in the sheet (zero tolerance), gutter consistency at all four edges of each cell, and alpha preservation for transparent sprites.

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Helpful Resources

Frequently Asked Questions

Sprite sheets or individual files — which is better today?

HTTP/2 made individual files cheap, but sheets still win for animation (single decode, frame-flip without flicker) and for many tiny icons on high-latency connections.

Why do sprites show edges of their neighbors?

Gutter too small. Regenerate with 3-4 px spacing, and ensure background-size in CSS matches the sheet's native size.

Can I get retina (2x) sheets?

Yes — drop 2x-sized sources; the generated CSS includes a background-size rule that halves dimensions for crisp retina rendering.