Poster Splitter: Print a Large Image on Multiple Pages
Split any image across as many Letter or A4 sheets as its real size takes, and print it on the printer you already own. Add a drawing grid that runs seamlessly from page to page to print a reference at the size of your canvas - then grid the canvas at the same cell size and copy 1:1, or trace. Pro prints unlimited sheets at 300 DPI with cut ticks, overlap guides and an assembly sheet. Your image never leaves your browser.
Drop a reference to print it gridded, at full size
JPG, PNG, WEBP · a photo, a drawing, a coloring page · processed in your browser and never uploaded
Free: plan any size, grid overlay with cell labels, and a 150 DPI draft of up to four sheets. Pro prints unlimited sheets at 300 DPI with cut ticks, overlap guides, mirror and ink-saver modes, and an assembly sheet. Start a free trial.
Draw 8 columns of 3 in cells on your canvas and copy cell for cell at 1:1.
Every Pro print also carries cut ticks, overlap guides and an assembly sheet.
Tip: print one draft sheet first and measure a grid cell with a ruler. If it's short, your print dialog is scaling - set it to 100% / “Actual size”.
Print a large image across multiple pages
A home printer tops out at Letter or A4, but a wall poster, a mural cartoon or a reference for a 24-inch canvas does not. The Poster Splitter splits one image into a grid of ordinary sheets, each a page in a single PDF, so you can print at an exact final size, trim the margins and tape the sheets together. It does the same job as Rasterbator, Block Posters or PosteRazor, but runs entirely in your browser - nothing is uploaded - and the sizes are real inches and centimetres rather than “pages wide” guesses. Every sheet is labelled (Sheet A1, A2, B1…) so the layout is obvious on the table. Pro prints add corner cut ticks, dashed overlap guides that show exactly where the next sheet's edge sits, and an assembly sheet with a map of every page and the instructions.
The grid method at 1:1
The grid method works by dividing a reference and a canvas into matching cells and copying one cell at a time. Usually the reference is small and the canvas is large, so every cell you copy is also an enlargement. Printing the reference at the size of the canvas removes that step: the cells on the print and the cells on the canvas are the same size, so you simply copy what you see - and for outlines you can tape the print behind the canvas on a window or lightbox and trace. Switch on the drawing grid and the Poster Splitter tiles the gridded reference across as many sheets as your size needs, with every grid line continuing exactly across the seams.
Grid the reference the way you already do in the Photo Grid Maker - choose the number of columns, and the tool shows the resulting cell size and labels every cell (A1, B2…) in the same convention. Then draw that cell size on your canvas with a ruler, or work it out for any surface with the proportion calculator.
How to print an image on multiple pages, step by step
- Upload your reference. Drop in the photo or drawing you want to grid. It stays in your browser - nothing is uploaded.
- Set the size of your canvas. Type the width or height of your canvas or paper in inches or centimetres, or pick how many sheets wide the print should be. Proportions stay locked to the image.
- Choose the grid. Pick how many columns the grid has; the tool shows the cell size and labels every cell (A1, B2…) exactly like the Grid Maker. The lines continue across every sheet.
- Pick paper and download the PDF. Choose Letter, A4, Legal, Tabloid or A3 and download one PDF with a page per sheet. Print it at 100% / Actual size with Fit-to-page switched off.
- Tape it up and grid your canvas. Trim the margins along the cut ticks, tape the sheets following the labels, then draw the same cell size on your canvas and copy each cell 1:1 - or tape the print behind the canvas on a window and trace.
Choosing your settings
Final size is the size the assembled print will be; proportions are locked to your image, so setting either side sets the other. The Sheets across buttons work the other way round - pick how many sheets wide you want and the tool sets the size that fills them exactly. Columns sets the drawing grid: fewer, larger cells for bold subjects, more for detailed work, exactly as in the grid generator. Paper and orientation change the page count: Fewest sheets tries both orientations and keeps the cheaper one. The overlap adds a shared strip along each seam for taping; with no overlap you trim every margin and butt the edges. Tick Borderless printer only if yours truly prints edge to edge.
Keep an eye on the resolution readout. It shows how many pixels per inch your image gives at the size you chose: a phone photo blown up to 36 inches lands around 100 ppi, which looks fine on a wall and is more than enough for the grid method. If it drops into the red, the outlines will print blocky - use a bigger image, or a smaller size. The mirror mode flips the image for graphite-on-the-back transfers, and the ink saver prints a grayscale copy that shows values clearly while sparing your cartridges - see the full walkthrough in how to transfer a drawing to canvas.
What people print with it
- Full-size gridded references. A portrait reference at the exact size of the canvas, gridded, ready to copy 1:1 or trace. Match a standard canvas first with the canvas size calculator.
- Mural cartoons. Tile a gridded design to wall size in sections and pounce or trace it onto the wall - work out the wall measurements with the Mural Scaling Calculator.
- Big grid drawing worksheets. Turn a photo into line art with the Coloring Page Generator and print it gridded at poster size for a classroom wall or a group project alongside the worksheet maker.
- Studio charts. Proportion guides, value scales and colour wheels at a size the whole class can read, on the printer you already own.
Frequently asked questions
- How do I print a large image on multiple pages?
- Upload the image, enter the final size you want, and the Poster Splitter splits it across as many Letter or A4 sheets as that size needs - each one a page in a single PDF. Print the PDF at 100% (Actual size), trim the printer margins along the cut ticks, and tape the sheets together following the labels (rows A, B, C and columns 1, 2, 3). Nothing is uploaded; the split happens in your browser.
- How do I print a gridded reference at the size of my canvas?
- Enter your canvas width, switch on the drawing grid and choose the number of columns. The grid lines run continuously from sheet to sheet, so once the sheets are taped together you draw the same cell size on the canvas and copy cell by cell at 1:1 - or tape the print behind the canvas on a window and trace.
- Why print the reference at full size instead of scaling with the grid method?
- Scaling works, but every cell you copy carries a conversion in your head. When the reference is printed at the size of the canvas, the cells on the print and the cells on the canvas are identical, so you copy what you see with no arithmetic - and you can tape the print behind the canvas on a window or lightbox and trace outlines directly. It is the same principle as the full-size cartoons muralists have used for centuries.
- Will the print really come out at the size I entered?
- Yes, as long as your print dialog is set to 100% or Actual size rather than Fit to page. Each page in the PDF is built at the paper's exact dimensions, so a 24-inch print comes out at 24 inches. Print a single sheet first and measure a grid cell with a ruler - if it measures short, the dialog is scaling it.
- How many pages will it need?
- The tool tells you instantly as you change the size, paper or overlap - for example 3 x 4 sheets for a 24 x 32 inch print on Letter paper. Choosing Fewest sheets for the orientation and a larger paper size such as Tabloid or A3 brings the count down.
- Is this a free Rasterbator or Block Posters alternative?
- Yes. Switch the grid off and it tiles any image across multiple pages at an exact size, like Rasterbator, Block Posters or PosteRazor - but it runs entirely in your browser and never uploads your photo, and the sizes are real inches or centimetres. The free draft covers up to 2 x 2 sheets; Pro prints unlimited sheets at 300 DPI with cut ticks, overlap guides and an assembly sheet.
- What is the overlap for?
- An overlap prints the same strip of image on two neighbouring sheets, giving you material to glue or tape and forgiving small trimming errors. Set it to none if you prefer to trim every margin and butt the edges together. Pro prints a dashed guide showing exactly where the next sheet's edge should sit.
- What image size do I need for a sharp print?
- The tool shows the resolution your image will print at for the size you choose. Around 150 pixels per inch and above looks like a photo print; 75 and above looks crisp from a normal viewing distance; below that it softens but is still perfectly usable for the grid method and tracing, where only the outlines matter.
- Can I use it for a mural?
- Yes. Print the gridded design at wall size in sections, tape them into a full-size cartoon, and transfer it with graphite or pounce - or use the printed grid to check your chalk-line grid on the wall. Work out the wall measurements first with the Mural Scaling Calculator.
Tools that pair with a full-size print
All Pro tools →Mural Scaling Calculator
Scale a reference to wall size with chalk-line positions and paint estimates.
Worksheet Maker
Turn any image into a printable grid drawing worksheet.
Art Projector
Trace references on your tablet screen with a grid overlay.
Coloring Page Generator
Turn any photo into a clean, printable line-art coloring page.
Free previews on every tool · full output with Pro (free trial)