Gang Sheet Packer

Packs transparent PNGs onto 300 DPI gang sheets for DTF film printing — entirely in your browser. Nothing is uploaded.

Demo — previews only, exports locked · Unlock the full app

Sheet DPI fixed at 300 →
Cut allowances inches ·
Designs
Drop PNG files here, or
DesignNatural px W ink (in)H ink (in)Copies Ink / canvas at print sizeTrimmedLbl?Rot?

W and H are the printed size of the visible artwork (the non-transparent ink box), not of the source file — transparent padding is scaled along with it but never counted in the size you type, and when “trim transparent margins” is on it also costs no film. Edit W or H and the other follows, preserving the ink aspect ratio.
Algorithm — Fast (rectangles) packs each design's tight ink box with MaxRects. Tight (ink masks) reduces every design to a 10 DPI silhouette and lets irregular shapes nest into each other's notches, then also runs the rectangle pack and keeps whichever complete result uses fewer sheets — so it is never worse than Fast, and is usually tighter for genuinely non-rectangular art. Slower (up to 8 s). Mask placements keep ink at least the gutter apart, rounded up to whole 0.1 in cells (default gutter → 0.2 in of true clearance).

Result

Add designs, then “Pack sheets”.