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PNG to PDF Converter
This free PNG to PDF converter turns your PNG images into a single PDF document right in your browser. Add one image or a whole set, pick the page size and layout, and download the finished PDF — your pictures never leave your device, because the whole conversion happens on your own computer. No uploads, no queues, and no sign-up.
All processing happens in your browser. Your images are never uploaded to any server.
How it works
A PNG file is a single picture, and a PDF is a document that can hold many pages. This converter bridges the two: it takes each PNG you add and places it on a page of a new PDF, in the order you added them, then hands you that PDF to download. The pictures themselves are embedded at their original resolution, so nothing is re-compressed and nothing is lost in the move. A screenshot, a scanned form, a phone photo, or a saved chart all come out looking exactly as sharp as the original file.
The page size and orientation decide the shape of every page. A4 (210 × 297 mm) is the standard paper size in most of the world, while Letter (8.5 × 11 inches) is the standard in the United States and Canada — pick the one that matches the paper you print on. Orientation set to Auto looks at your first image and chooses portrait for tall images and landscape for wide ones; you can also force portrait or landscape yourself. The margin setting controls the white border around each picture: narrow (half an inch) shows the image large, normal (one inch) leaves room for hole punches and notes, and none fills the page edge to edge.
The layout options decide how many pictures share a page. One image per page is the classic choice for a photo set, a scanned multi-page form, or a series of screenshots — each picture gets a full page of its own. Two or four images per page packs the pictures into a grid, which is handy for contact sheets, receipts, or before-and-after comparisons where you want several pictures side by side. With Fit, each picture is scaled to fill its cell without changing its shape, so nothing is squashed or stretched; with Stretch, the picture is forced to fill the whole cell, which fills the page completely but can distort wide or tall images. For most uses, Fit is the right choice.
Before any image is placed, the tool checks that it really is a PNG. It reads the first bytes of each file and looks for the PNG signature — the eight-byte marker every genuine PNG starts with. A JPEG or a text file that was simply renamed to end in .png fails that check, and the tool tells you which file was rejected instead of producing a broken PDF. Files that pass are loaded in your browser, laid out on the pages you chose, and written into the PDF with a local copy of the jsPDF library. Nothing is uploaded at any point: the whole job runs on your own device, so private photos and documents stay private, and the converter even works with no internet connection once the page has loaded.
The finished PDF is named from the file name box — by default images-to-pdf.pdf — and downloads straight to your computer. It opens in any PDF reader, prints on any printer, and can be emailed or shared like any other PDF. If a picture comes out smaller than you expected, check the orientation and the images-per-page setting first: a tall screenshot on a landscape page, or four images sharing one page, will always look smaller than one image on a portrait page.
Worked example
A teacher has taken three screenshots of a worksheet on her phone and wants to send them to a colleague as one document. The files are worksheet-1.png (1170 × 2532, 1.4 MB), worksheet-2.png (1170 × 2532, 1.3 MB), and worksheet-3.png (1170 × 2532, 1.5 MB).
Step 1: Add all three PNG files in the file picker, in order, and keep the default settings: A4, Auto orientation, 1 image per page, Fit, narrow margins.
Step 2: The tool lists the three files and shows a total of 4.2 MB. Auto orientation picks portrait, because each screenshot is taller than it is wide.
Step 3: Press Convert to PDF. Each screenshot is fitted into the A4 page, keeping its tall shape, with a half-inch white margin around it.
Step 4: Press Download .pdf to save the file as images-to-pdf.pdf.
The result is a 3-page A4 PDF, one screenshot per page, about 4.2 MB in total — the same size as the three PNGs added together. The colleague opens it in any PDF reader and prints it on A4 paper, with each worksheet filling the page.
FAQ
Are my PNG images uploaded to a server?
No. Your images are read and turned into a PDF entirely in your browser, using JavaScript running on your own device. Nothing is uploaded, so private photos, screenshots, and scanned documents stay on your computer.
How many PNG images can I combine into one PDF?
There is no fixed limit in the tool. A handful of photos works instantly, and a few dozen ordinary screenshots or phone photos work fine too. Very large images use more memory, so if you are combining hundreds of high-resolution photos, convert them in smaller batches of 20 to 30 at a time.
What happens to transparent parts of a PNG?
PDF pages have no transparency, so transparent areas of a PNG are shown on a white page background. A logo saved with a transparent background will look the same on the white page, but a photo with see-through cut-out sections will show white where the transparency was.
Which page size should I choose, A4 or Letter?
Choose A4 if you print on A4 paper, which is the standard almost everywhere outside North America. Choose Letter (8.5 by 11 inches) if you print in the United States or Canada, where Letter is the standard paper size. The images are fitted to whichever size you pick, so either choice looks correct.
Will the PDF keep the original image quality?
Yes. Each PNG is placed into the PDF at its original resolution, and the file is not re-compressed, so the pictures in the PDF look exactly as sharp as the originals. The PDF file itself will be roughly the same size as your PNG files added together.