BlockPoster.ai

BlockPoster.ai is a browser-based block poster maker for turning one image into a large poster you can print and assemble at home. Upload a JPG, PNG, WebP, or PDF page, or create original artwork with AI, then choose your paper size, orientation, poster width, margins, overlap, crop behavior, and Fit or Fill mode.

The workspace shows a live poster grid before export, so you can see how many sheets your design will use and how the final image will be divided. When you are ready, download a print-ready PDF with individual poster tiles, page labels, trim guidance, overlap support, and an assembly guide. Print the PDF at Actual Size or 100%, trim where needed, and combine the sheets into one larger wall poster.

BlockPoster.ai is useful for photo walls, classroom maps, event signs, party backdrops, business displays, educational materials, AI artwork, and home décor. The basic image-splitting workflow is available for free without an account. Paid options unlock watermark-free output, higher-resolution exports up to 300 DPI, and larger poster layouts.

Your normal poster images are processed locally in the browser whenever possible, helping keep the core print workflow fast and privacy-conscious. The product is available in English, French, German, Italian, Spanish, Portuguese, Russian, Chinese, Japanese, and Turkish.