BlockPoster.ai is a browser-based block poster maker that splits a single image into a multi-page PDF sized for ordinary home printers, letting users assemble the printed sheets into wall-sized art. It accepts JPG, PNG or WebP uploads up to 40 MB (or AI-generated artwork) and outputs an already-split, multi-page PDF with assembly guides, page numbers and optional trim/overlap marks.
What is BlockPoster.ai?
BlockPoster.ai is a free block poster maker that converts one image into a multi-page PDF printed across ordinary sheets and taped together into wall-sized art. Users upload a JPG, PNG or WebP (up to 40 MB) or generate artwork with AI, then crop, split and preview the layout in a browser workspace. The output is a downloadable, already-split PDF with an assembly guide on page 1. The page does not name a company or maker.
Key Features
- Five paper sizes — A4, US Letter, A3, US Legal and Tabloid, in portrait or landscape orientation, with adjustable margins.
- Sheet-count control — set width or sheets across; free PDFs support up to 5 sheets across, paid HD PDFs up to 10.
- Local photo processing — ordinary uploads and PDF pages are decoded, cropped and split inside the browser without uploading originals; AI generation is separate and uses online providers.
- Assembly aids — overlap so neighboring sheets repeat image detail, page numbers, optional trim guides, corner marks and crosshairs, plus a PDF page 1 assembly guide.
- Live preview — page grid and artwork preview update automatically with print layout, finished size in cm and total page count.
- Free basic PDF — single-image, multi-page export without an account, capped at 150 DPI with a small brand watermark; repeat downloads allowed.
- Batch processing (paid) — process multiple images in a set with shared print settings while each image keeps its own crop; batch ZIP is not included in Free.
- No install — runs in a modern browser on desktop, laptop, tablet or phone; no app or extension required.
Who is it for?
- Home decorators and families — print a favorite photo as large wall art using an ordinary home printer and standard paper.
- Teachers and classrooms — enlarge classroom artwork or posters across A4/Letter sheets without a large-format printer.
- Crafters and hobbyists — assemble multi-sheet posters from photos or AI-generated art, trimming and taping sheets from the back.
- Budget-conscious users — try the full layout process free before choosing a paid HD, watermark-free download.
What can you do with BlockPoster.ai?
- Make wall art from a photo: upload a JPG, PNG or WebP, choose paper size and sheets across, preview the finished dimensions, then download the split PDF and print at 100%.
- Create with AI: sign in to generate original artwork from a prompt (and optionally a chosen reference image), then split it into a block poster.
- Batch multiple posters: on paid HD, process a set of images with shared print settings and per-image crops, then export the set.
- Reuse layouts: save a print preset to reuse settings later, and save projects locally in the browser.
How does BlockPoster.ai work?
- Start: upload a JPG, PNG or WebP, or sign in to generate artwork with AI.
- Size: choose paper size and orientation, set width or sheets across, adjust crop, margins and overlap, and check page count and effective DPI.
- Print: download the already-split PDF, print each page at Actual size / 100% (not Fit to page), test one sheet, trim guides, align overlapping details and tape the backs together.
Pricing
Freemium: a free basic PDF (single image, up to 150 DPI, small brand watermark, up to 5 sheets across) is available without an account; paid HD downloads remove the watermark, raise the DPI cap and support up to 10 sheets across plus batch processing. Specific prices are not stated on the page.
FAQ
Is BlockPoster.ai free?
Yes, a free basic PDF is available without an accou
