The brief was simple: make a real poster a real shop would print, using only free tiers, and find out which tools meet what an actual print job demands: clean export resolution, readable text and no watermark surprises.

Nine makers compared. Four earned a recommendation. The failures fell into three buckets, and each one is a lesson worth ten minutes of your time.

The first bucket was resolution lies. Two tools exported “high resolution” files that turned out to be 96 DPI web images stretched to A4, which looks fine on screen and like wet cardboard in a shop window. The lesson: check pixel dimensions before download, and compute DPI yourself at your print size.

The second bucket was watermark ambushes. One tool produced a beautiful poster, then stamped a translucent logo across the center at export, an upsell in the form of a surprise. Another watermarked only “premium fonts”, which it silently used in its best-looking template. The lesson: zoom to 100 percent on the exported file before you send anything to print.

The third bucket was text decay. Five tools rendered the headline wrong on the first generation, and two never got it right across ten tries. Ideogram fixed text rendering this year and passed cleanly; Canva sidesteps the problem entirely by keeping text as text. The lesson: generate art, add words in a design tool, and never trust an image model with your phone number.

The four survivors, Canva, Ideogram, Microsoft Designer and Adobe Express free, all share one trait: they treat the export as the product, not the demo. That is the whole test. If a tool would not ship its own output to a printer, it is a toy, and your shop wall deserves better than a toy.