Drop an artwork file and get its true DPI at your print size, its transparency, and whether it will reprint.
Drop an image here
The file never leaves your browser
It is read on this device with FileReader and a canvas. Nothing is uploaded, nothing is stored, and no copy is kept anywhere.
Print size
12 × 16 in is the usual adult front-of-shirt area. Drop it to 3.5 × 3.5 in for a left chest, 3 × 3 in for a sticker, or 18 × 24 in for a poster.
Drop a PNG or a JPEG on the left. This side fills in with its pixel size, aspect ratio, weight, transparency and the DPI it would really print at.
Everything runs in your browser. Nothing is uploaded.
Most reprints are caused by one of three things: not enough pixels for the size, a flattened background where transparency was needed, or the wrong file type.
This checks all three. The file never leaves your browser — it is read locally with a canvas and nothing is uploaded.
DPI is not a property of your file. It is pixels divided by print inches. A 3600 x 4800 px file is 300 DPI at 12 x 16 in and 150 DPI at 24 x 32 in.
For direct-to-garment, 150 DPI at the finished size is the honest floor; the fabric cannot hold more detail than that. 300 DPI is the target for paper, stickers and posters.
Apparel prints need a real alpha channel. A JPEG cannot have one, which is why a white box appears around the design.
To find the pixel dimensions a given placement wants, use the design size calculator; to get a transparent background onto artwork that has none, use remove background. DPI, bleed, and the 300 DPI myth explains why 300 is the wrong target for fabric in the first place, and gives the dimensions for every common placement.
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