PDF Poster Maker

Tile one PDF page across printable sheets with overlap, trim guides and an assembly map.

One large PDF page → printable poster sheets

Choose a PDF. The default layout is prepared automatically, with overlap and an assembly map.

Choose one PDF to tile locally · up to 25 MiB

Paper size

Sheet orientation

Source page

Scale, overlap and assembly guides

Poster scale (%)

Sheet margin (mm)

Repeated overlap (mm)

Add trim marks, row/column labels and a 1-inch print-scale guide

Margin is reserved on each sheet. Adjacent sheets repeat the overlap region. Changing settings replaces the previous result.

1–300 source pages · one selected page · at most 100 output sheets / 50 MiB. Ordinary unsigned PDFs only: forms, detected certification permissions, annotations/links and nonstandard UserUnit are refused. Artwork is re-embedded on white; original metadata and interactive features are not preserved. Processing stays local. Cancel/replacement prevents a stale export; PDF parsing/saving may finish its current bounded operation before cancellation is checked.

This tool processes its input contents in your browser instead of sending them to a processing service. Page, asset and fixed usage-measurement requests are described on the Privacy page.

Split one selected PDF page into A4 or Letter poster sheets with overlap, guides and a geometric assembly map, without a document upload.

How to use it

1Choose an ordinary unsigned PDF or try the local example.
2Keep the default layout or select the source page, paper, scale and overlap.
3Download the tiled PDF and optional sheet-map JSON.
4Print at Actual size / 100%, check the scale guide and join the overlap.

Example

Input: 850 × 600-point source; A4 portrait; 100%; 10-mm margins and 5-mm overlap.
Output: 2 columns × 1 row, with a poster about 299.9 × 211.7 mm.

Paper output is checked separately from the assembly drawing; printer scaling still needs a trial sheet.

What happens to your data

Poster generation reads the local PDF into tab memory, normalizes its selected visible page and clips it into a new PDF. The document is not uploaded or persisted by this tool. The optional local sheet map excludes original filenames and source text; it still describes page geometry, so review it before sharing. Generated PDFs are new documents, not signed or metadata-preserving copies.

Last updated November 2026

Print a large PDF page using an ordinary A4 or US Letter printer. Choose a local PDF and this tool prepares tiled sheets automatically at the default 100% scale. Download the resulting PDF, print each output page at Actual size, then trim and join the sheets using the repeated overlap. The source stays on your device.

This is useful for oversized diagrams, display posters, maps and craft templates already saved as PDF. It splits one selected source page across several physical sheets. PDF N-up does the reverse: it fits several source pages onto one sheet. Resizing a page alone does not provide the tile positions needed for assembly.

How it works

The selected page is read using its visible CropBox intersected with its MediaBox. Supported quarter-turn rotations are normalized before tiling, so row one refers to the visual top rather than the raw PDF coordinate origin. The normalized artwork is embedded once and clipped into the output sheets; vector paths and text are not intentionally rasterized. A white background is added behind the page.

At 100%, one source PDF point maps to one output point. PDF points are 1/72 inch. A 200% scale doubles both dimensions and can require about four times as many sheets. The printable tile is the paper size minus the reserved margin on each side. Columns advance by printable width minus overlap, and rows by printable height minus overlap. Geometry uses browser floating-point numbers with tiny tile-edge comparison tolerances, below one millionth of a PDF point for the supported papers; it is not arbitrary-precision tiling. The last row or column may contain unused paper. The downloaded JSON records each sheet's row, column, position and covered source rectangle. It contains no original filename or document text.

The default margin is 10 mm and overlap is 5 mm. A margin of 5–30 mm is allowed; overlap is 0–30 mm and must remain below half the printable width and height. Guides place trim marks and tile labels in the margins, with a 1-inch / 25.4-mm scale line on the first sheet. The assembly diagram in the interface is a geometric sheet map, not a rendering of your document. Check the actual downloaded PDF before printing.

Inputs are limited to 25 MiB and 1–300 source pages; one page is selected per export. A layout may contain at most 100 sheets and its saved PDF at most 50 MiB. Forms, detected certification/signature permissions, annotations including links, password-protected files and nonstandard UserUnit pages are refused. Keeping a signed original is essential: generating another PDF cannot preserve its cryptographic signature. Original document metadata and interactive features are not carried into the output. Cancel and replacement invalidate the export; bounded PDF parsing or saving may finish its current operation before cancellation is checked.

Worked example: An 850 × 600-point page at actual size

Input: 850 × 600 PDF points; A4 portrait; scale 100%; margin 10 mm; overlap 5 mm.
Result: 2 columns × 1 row: 2 A4 output sheets. Poster dimensions are about 299.9 × 211.7 mm.

The included local example contains colored corner markers and a diagonal line. Its exported tiles and assembly geometry are checked separately.

Common use cases

Printing a large diagram across a desktop printer's sheets
Preparing a PDF craft template without shrinking its dimensions
Sharing a tiled poster PDF that does not depend on a printer's poster mode
Recording a repeatable assembly map for a display

Frequently asked questions

Which print settings should I use?＋

Print one output PDF page per sheet at Actual size / 100%. Disable fit, shrink, booklet and multiple-pages-per-sheet settings. When guides are enabled, measure the first sheet's 1-inch line. Printer hardware and drivers can still add margins or scaling; try one sheet before a large print run.

Does overlap enlarge the poster?＋

No. Scale sets the poster dimensions. Overlap repeats an edge region on adjacent sheets to help alignment and taping; more overlap can increase the sheet count. Trim the guides and align the repeated artwork rather than adding both repeated strips to the assembled size.

Will text and vector lines stay sharp?＋

The page content is re-embedded rather than deliberately converted to pixels. Source bitmap images still have their original resolution, and a larger print can expose that limitation. This is not an upscaler or a print-color management system.

Why was a PDF with links or form fields refused?＋

Page re-embedding does not preserve those interactive objects reliably. Refusing them avoids exporting an apparently complete poster that lost visible annotations or form values. Export a suitable flattened, unsigned copy with the relevant application and keep the original.

Can I tile an entire multipage document at once?＋

This version tiles one selected page per export. Choose another source page to make a separate poster. It does not silently process every page or combine several unrelated pages into one continuous poster.

Is the document uploaded or saved in browser history?＋

No document upload or persistent document storage is used by this tool. File bytes and generated PDFs remain in tab memory, and downloads happen only when you choose them. Closing or reloading the page removes its working state.