Free · No account · Files stay local
Turn a photo into a wall-sized poster with The Rasterbator. Choose original detail or halftone dots, then download a tiled PDF for your home printer. Free, no account, and your image stays on your device.
Features
One picture, the paper you already have, and a poster size that suits your space.
Rasterbator retains the full-resolution file for original-photo export. Screen previews use a smaller copy to stay responsive, while the PDF takes each page from the original. Check the photo-detail readout before committing to a large print.
Start with a Rasterbator template, then adjust the shape, grid spacing and dot range. Circle, line, mosaic and other treatments give different textures. The large preview changes as you edit, so you can compare the whole composition.
Choose A4, US Letter or another supported paper size, set portrait or landscape, and size your Rasterbator poster by sheets wide or high. The workspace shows the finished dimensions and total page count together.
Download the Rasterbator PDF as one document, or save individual JPG tiles in a ZIP. Optional crop marks, overlap and page coordinates help you trim and arrange the pages. A separate JPG preview shows the complete poster.
What it is
The Rasterbator turns one image into a poster made from several printed sheets. You choose the paper and how many sheets the picture spans; the tool works out the other dimension from the image proportions. The downloaded PDF contains one printable tile per page, ready to trim and join. A regular A4 or US Letter printer can therefore produce a picture much larger than a single sheet.
Rasterbation also describes the dotted, halftone look associated with these posters. Dark areas become larger marks and light areas become smaller ones. Seen from a distance, those marks form the picture. If you prefer a continuous photograph, choose No effects instead. Rasterbator.im supports both approaches in the same workspace: original-photo tiles for photographs and artwork, or patterns for a graphic wall-art treatment. It is an independent alternative to The Rasterbator, the original tool at Rasterbator.net.
How to
Use the same workspace from the first image to the final printable file.
Upload a JPG, PNG, WebP or AVIF image to Rasterbator, or start with one of the example pictures. A direct public HTTPS image link also works when its host allows browser access. Choose the clearest source you have; enlarging a small screenshot cannot restore detail.
In the Rasterbator workspace, select your paper, orientation and poster width or height. Keep the whole image or choose a centered crop to fill complete sheets. Then choose No effects for a photograph or a pattern template. Use the question-mark guides when a setting is unfamiliar.
Open Print and generate your Rasterbator PDF. In the printer dialog, match your paper and select Actual size or 100%. Print one page first. When it looks right, print the rest, arrange the coordinates by row, trim along the marks and tape the sheets together.
Choose your look
A Rasterbator poster can keep the original photograph or turn it into a pattern. Choose the result you want before fine-tuning individual settings. Both routes use the same paper layout, margins and download controls.
| Style | What you get | Useful for | What to check |
|---|---|---|---|
| Original photo | Continuous image, without dotsPoster size, crop and print settings | Photographs, illustrations, maps and artwork | Retains the original file for export; source pixels still limit sharpness. |
| Classic halftone | Marks grow or shrink with image brightnessShape, grid size, dot range and colors | Graphic portraits and bold wall art | Fine spacing reveals more pattern detail; coarse spacing gives a bolder look. |
| Mosaic and other patterns | Blocks, lines or character-based treatmentsOnly the controls used by the chosen effect | Stylized artwork and experimentation | Compare the full composition and print a test page before making the whole poster. |
Why this workspace
The Rasterbator canvas stays beside the settings on desktop and above them on a phone. Size, Style, Color and Print are sections of the same workspace. You can revisit a setting without restarting the image selection.
Rasterbator processes local images and creates downloads in the browser. There is no account or image-processing upload. Importing a URL requests the picture from its original host, which must permit the browser to read it.
Question marks open illustrated Rasterbator guides for dots, margins, cropping and assembly. Pattern examples use your selected picture. Closing a guide keeps your current settings, so you can learn what an option does before changing it.
Rasterbator starts with familiar paper settings and shows your page count before export. Image dimensions and photo PPI help you judge scale. Large jobs remain limited by browser memory; the tool does not promise unlimited resolution or perfect results from every source.
Ideas
These starting points help you choose a treatment before fine-tuning the settings.
Use Rasterbator to turn a landscape or portrait you already like into a larger print. Start with original-photo mode, then compare the finished dimensions with the available wall space before increasing the number of sheets.
More paper makes a larger picture, not more source detail. Check PPI and a test print.
Choose a face with clear light and dark areas, then try the classic Rasterbator dots. Make a few grid-size comparisons at the same poster dimensions. A design that looks abstract close up may read well across the room.
Look at the whole image from your intended viewing distance before printing every page.
Rasterbator can divide your own finished graphic across standard paper for a classroom display, party backdrop or group project. Check any lettering in the source at its final size, and let helpers assemble one numbered row at a time.
Use artwork you created or have permission to reproduce. Rasterbator is not a license to reuse copyrighted images.
Before you print
Start with the original camera image or artwork export. Rasterbator preserves that source for photo output, but a screenshot or previously compressed copy may already have lost fine detail. Compare the photo PPI with how close people will view the poster.
Keep a margin unless you know your printer can handle the selected layout. Rasterbator defaults to 10 mm. Optional overlap repeats neighboring image content inside that margin, helping you cut and align pages without changing the finished dimensions.
Print the Rasterbator PDF at Actual size or 100%, on the paper size selected in the workspace. Avoid an additional Fit to page step, which can shrink each tile. Check one physical page before spending paper and ink on the rest.
Arrange pages before trimming: A1, B1 and C1 go across the first row; A2, B2 and C2 start the next. Use a ruler for straight cuts and attach tape on the back. Keep the coordinates visible until you know where each sheet belongs.
Use Expand on a small screen and compare Original with Effect preview. Rasterbator preview grid lines are guides, not lines printed across your artwork. Show unused paper explains partial final rows; centered cropping can fill those sheets if losing image edges is acceptable.
FAQ
Paper sizes, sharpness, downloads and the details that matter when you print.
The Rasterbator makes one image printable across several sheets of paper. You can preserve the photograph or apply a halftone pattern, download the tiled PDF, and assemble the pages into a large wall poster.
No. The Rasterbator is the original service at Rasterbator.net. Rasterbator.im is an independent alternative for turning one image into a tiled wall poster. You can keep the photograph or use halftone effects, preview the layout and download printable pages in your browser.
Rasterbator.im is free to use and does not require an account. You can generate a poster PDF, download JPG tiles and save a preview without a subscription. Your own printing supplies are separate.
Choose an image, select your paper and poster size, then choose a style. Check The Rasterbator preview, open Print and generate the PDF. Print one page at Actual size before printing and assembling the full set.
Use the same paper size and orientation selected in Rasterbator, and choose Actual size or 100% in the PDF reader. Extra scaling can change the dimensions. Test one page, then keep those settings for the remaining pages.
Yes. Select No effects in the Rasterbator template list to divide the original photograph into pages. This mode uses the retained full-resolution image for export. Shape and dot-size controls are hidden because they do not affect an unfiltered photo.
In Size, enter the number of sheets and choose sheets wide or sheets high. Rasterbator calculates the other dimension from the image proportions and displays the physical size. Decimal values such as 4.7 sheets allow finer adjustment.
A small source image has limited detail when enlarged. Rasterbator keeps the original pixels for photo export, but cannot create missing detail. Use a higher-resolution source, reduce the poster size, or choose a halftone treatment suited to viewing from farther away.
Grid size sets the spacing between samples. The minimum and maximum dot percentages limit the size of marks within that spacing. Rasterbator starts at a 0–100% range; the question-mark guide shows what narrower ranges look like on your picture.
Margins reserve space around each tile for the printer and assembly aids. Overlap repeats a strip of adjacent image inside those margins. In Rasterbator, overlap cannot exceed the margin and does not change the assembled poster dimensions.
The proportions of your picture usually differ from a complete grid of paper. Rasterbator keeps the whole image by default, which can leave unused space. Choose Crop edges to fill complete sheets if you are comfortable trimming content from the image edges.
Rasterbator accepts JPG, PNG, WebP and AVIF, plus HEIC when the browser supports it. Choose A5 through A1, US Letter, Legal, Tabloid or custom paper dimensions. Both portrait and landscape orientation are available in the Size section.
The workspace adapts to a phone screen, with a persistent preview and an Expand view. Image decoding and downloads depend on your browser. Rasterbator runs locally, so a desktop with more memory is a better choice for very large projects.
Local image processing and PDF generation happen in your browser. Your picture is not uploaded to Rasterbator for processing. If you import a public image URL, your browser contacts that image host directly; closing the page discards the current workspace.
The Rasterbator PDF puts all printable pages into one document. ZIP contains the individual JPG tiles for separate use. The preview JPG shows the whole poster at preview resolution; use the PDF or tiles for the printable output.
No installation or browser extension is required for this website. Rasterbator.im runs in a modern browser. It is an independent tool and is not the original Rasterbator.net service or its old desktop application.
Start with The Rasterbator and a photo or an example above.
Make a poster
