Printful Design Checker: Front Print (DTG) Pre-Flight
Printful's direct-to-garment front print is artwork on a fixed canvas at 300 DPI. This preset checks a 3600 × 4800 pixel canvas, which is 12 × 16 inches. A design with too few pixels for its printed size is stretched, and it shows.
Drop your design into the tool above. The validator measures it against the preset, checks transparency and safe margins, flags colours that print badly and exports a print-ready PNG with the DPI written in. Print areas are revised and differ by product, so confirm yours on the product page or set it as a Custom canvas.
This is the POD Print Validator set up for one case. See everything it does →
POD Print Validator
A print pre-flight tool for print-on-demand designers. Drop in up to 50 designs and it checks each one against a platform's real specs (Merch by Amazon, Printify, Printful, posters, mugs, phone cases, KDP covers) for resolution, safe margins, bleed, transparency and CMYK gamut, then exports print-ready files. Every pixel stays on your machine.
What it measures
Resolution is read from your file's real pixel size divided by the product's physical print size, giving the effective DPI along the limiting axis: the number the printer sees. Safe-margin checks trace your artwork's actual content and test whether it clears the safe zone. Transparency scans the alpha channel for a solid background and for the soft-edge “halo” that dirties a cut-out.
Runs in your browser
Decoding, alpha scanning, background removal, DPI compositing and DPI stamping run locally, with the heavy pixel work in a Web Worker so the batch stays responsive. Your artwork is never uploaded, which matters when designs are your inventory. Exports are built and zipped in the browser too.