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Block Poster Maker

Create a tiled poster from an image or PDF page, choose a joining method, and download the print guide.

Poster maker

Start with an image

A photograph, a favorite illustration, a big idea.

Drop your image hereJPG, PNG, WebP, static AVIF, PDF; HEIC/HEIF if this browser can decode it.or paste an image

Processed on this device. Your image is not uploaded unless you explicitly choose cloud processing.

Local files: up to 100 MiB, 100 MP and 16,384 px per side. Device memory may require smaller files.

Or explore a sampleSample artwork

An example image is selected. You can also upload your own.

Saving keeps the image and settings in this browser’s IndexedDB. You can remove them here.
Save project on this device
Scale reference · 180 cm
49.7 cm
74.5 cm
49.7 × 74.5 cm · 8 sheetsExample illustration · export uses its rasterized image

Prepare a file and a place on the wall

Measure the available wall space and decide whether the entire image must remain visible. Use an original JPG or PNG when possible. The simplified entry opens the first page of a PDF. If you need a different page, prepare a single-page PDF containing it first; this is not an entire-document merge.

A portrait image and a landscape space have different proportions. Keep the whole image to avoid losing faces or text; use crop only after checking what the edges remove.

Make the poster

  1. Upload a file or open a gallery example. Keep Original image for a photographic result.
  2. Select the paper in your printer: A4 and Letter are different sizes. Choose a suggested finished size or open the advanced size controls.
  3. For a measured space, use exact dimensions and check the resulting width and height. A paper-saving option may deliberately reduce them.
  4. Choose seamless assembly, white dividers or a framed display. Inspect the page preview, especially faces and text near joins.
  5. Download the PDF, then open it in a PDF reader. Choose the matching paper, one page per sheet, single-sided, and Actual Size / 100%.

Print a small test before the full batch

Use the test download with a ruler and neighbouring pages. Measure the 100 mm line and align the repeated edge content. If it measures 97 mm, the print has been reduced to 97%; do not print the remaining pages yet.

The number of sheets depends on margins, overlap and orientation, not just the area of the finished picture. Trust the current print preview rather than multiplying whole A4 dimensions.

If something looks wrong

Missing edges usually mean the paper margin is too small for the printer or a crop was selected. An unexpectedly small result usually means Fit or Shrink was enabled. Duplicate mini-tiles may mean Poster mode was applied to an already tiled PDF.

If export fails, keep the original file, retry with a smaller image or fewer sheets, and close memory-heavy tabs. The core local workflow does not require payment or a cloud upload.