BlockPoster.ai

BlockPoster.ai runs in the browser with no app installation. Users upload JPG, PNG, WebP or PDF files up to 40 MB, or create artwork with AI. They choose from A4, US Letter, A3, US Legal or Tabloid paper in portrait or landscape, set the number of pages across and height, adjust crop, margins and overlap, and check a live print-layout preview. The free tier exports a single-image, multi-page PDF up to 150 DPI with a small brand watermark and up to 5 sheets across. Paid plans unlock HD, watermark-free PDFs up to 300 DPI, up to 10 sheets across, and batch export. Ordinary uploads are processed locally in the browser, while Create with AI sends prompts and chosen reference images to online providers. The site also offers a printer calibration page and a print guide with assembly instructions.

Key features

• Split one image into a multi-page printable block poster PDF
• Free single-image PDF export up to 150 DPI with small brand watermark
• Paper sizes: A4, US Letter, A3, US Legal, Tabloid
• Portrait and landscape orientation
• Adjustable pages across and height, with Fit and Fill crop modes
• Margin and overlap settings
• Live print-layout preview with page navigation, overlap, trim and alignment guides
• PDF page 1 serves as an assembly guide
• Printer calibration page with 100 mm ruler, 4 inch ruler and 50 mm square
• Effective image DPI estimate
• Local browser processing of uploaded photos and PDF pages
• Create with AI option for generating artwork (uses credits)
• Paid HD, watermark-free downloads up to 300 DPI, with batch ZIP export on paid plans
• Multiple language interface options

Best suited for

• Educators and classroom creators making large display posters
• DIY makers and craft enthusiasts enlarging reference images
• Home decorators printing photos or artwork across a wall
• Event planners creating welcome displays or party backdrops

Pricing

Free tier available with basic PDF exports. Paid plans: Starter $4.99/month, Creator $19.99/month, Studio $39.99/month, plus one-time packs at $4.99, $14.99 and $39.90. Prices are listed in USD.