The exact workflow Etsy poster sellers use to turn a Midjourney render into a 300 DPI file Printful and Gelato accept on the first upload.
Midjourney v6 and v7 output stunning artwork — but at roughly 1024–2048 px on the long edge. That's perfect for a screen and far below what Printful, Gelato and Printify require. To print a sharp A3 at 300 DPI you need at least 3508 × 4961 pixels; A2 needs 4961 × 7016. Stretching the file in Photoshop only spreads the same pixels — print services detect it and reject the listing.
In Midjourney, append --ar 2:3 for portrait posters (matches A-series and 16×24"), or --ar 3:2 for landscape. Avoid square unless you specifically want 1:1. Pick a style with texture (illustration, vintage, matte) — it upscales cleaner than photographic noise.
After the initial 4-image grid, click U on your favourite, then Upscale (Subtle). This preserves the original composition without hallucinating new details. Download the resulting PNG directly from Midjourney — never screenshot it; screenshots compress and strip the data your printer needs.
Drag the Midjourney PNG into Poster Upscale AI, pick the poster size you list on Etsy (A3, A2, 18×24" or custom on Pro), and let the pipeline rebuild real resolution. The export is a true 300 DPI PDF + a matching high-res PNG for mockups — usually ready in 10–15 seconds.
Upload the new PDF to Printful or Gelato. The red "low resolution" banner should disappear. If it doesn't, your source was likely compressed (screenshots, watermark-stripping tools, social downloads).
Got a Midjourney render ready? Convert it to a print-ready 300 DPI poster in one click.
Choose a plan →v6 or v7 — they produce sharper detail that survives upscaling. Use --ar 2:3 for portrait posters or --ar 3:2 for landscape.
Use Midjourney's built-in Upscale (Subtle) first to preserve detail, then run our pipeline for the print-ready 300 DPI export.
Avoid heavy text overlays — AI text degrades when enlarged. Add typography in Canva or Photoshop after the upscale.
Yes, within Midjourney's commercial terms (paid plan required) and the rights of any reference images you used.
Real 300 DPI export accepted by Printful, Gelato and Etsy printers.