CalConverters

Images to PDF

Drop JPG, PNG, or WebP images, arrange them in order, pick a page size, and download one combined PDF. Everything runs locally — nothing is ever uploaded.

Files never leave your device

Drop images to convert, or click to browse

JPGJPEGPNGWEBP

What This Tool Does

This tool combines two or more images — JPG, PNG, or WebP — into a single PDF, one image per page, in whatever order you choose. Drop your files onto the page, arrange them with the move-up and move-down controls until the list matches the page order you want, then click convert to download one PDF containing every image.

There's no account to create and nothing to install. Conversion runs through a small WebAssembly module loaded into your browser tab, so your images are read, turned into PDF pages, and handed back as a download entirely on your own device.

Tip: If your images are different sizes and you want every page to look uniform, switch the page size to A4 before converting — each image is scaled to fit and centered on a fixed-size page instead of dictating its own page dimensions.

Why This Runs Entirely in Your Browser

Plenty of "JPG to PDF" tools ask you to upload your photos to a server first. That's a habit worth avoiding when the images in question are scanned IDs, signed documents, or anything else you'd rather not hand to a third party even briefly. This tool skips the upload step entirely — the conversion logic runs as WebAssembly directly inside your browser tab, so image bytes never cross the network. There's also no server-side size ceiling; the only real constraint is how much memory your browser tab can hold while assembling the PDF, and you'll get a warning if your combined files climb past roughly 100 MB.

What Happens to Your Images on the Way In

How an image is handled depends on its format. A JPG is embedded into the PDF page as-is — its original compressed bytes are placed straight into the file without being decoded and re-saved, so there's no quality loss and no re-compression pass, no matter how the image looked going in. PNG and WebP images work differently: they're decoded, and if they carry transparency, anything see-through is composited onto a solid white background before the pixels are written losslessly into the PDF. That composite step matters because PDF pages have no concept of transparency the way PNG does — without it, transparent pixels would show up as an unpredictable color rather than the clean background you'd expect.

Choosing a Page Size

By default, each page is sized to match its image exactly — a wide photo becomes a wide page, a tall screenshot becomes a tall page, with no borders or scaling involved. If you'd rather every page in the output share one fixed size regardless of what you feed in, switch to A4 portrait or A4 landscape: each image is scaled down to fit within that page and centered, which is the better choice when you're combining images of very different dimensions and plan to print the result.

Working With the Result

Once conversion finishes, your PDF downloads with one page per image, in the order your list specified. If you later want to combine that PDF with other PDF files, Merge PDF brings several documents together into one. If you need to reorder, rotate, or drop a page from the result afterward, Organize PDF gives you a visual thumbnail grid to do it. And if you ever need to go the other direction — pulling images back out of a PDF's pages — PDF to Images renders each page to a JPG or PNG.

Frequently asked questions

Which image formats can I convert to PDF?
JPG (JPEG), PNG, and WebP. You can mix formats freely in the same batch — drop a few JPEGs alongside a couple of PNGs and a WebP screenshot, and they'll all land as pages in one combined PDF, converted together in a single pass.
Does the order I add images in matter?
Yes — pages come out in the order shown in your list, top to bottom. After dropping your images, use the move-up and move-down controls on each thumbnail to arrange them exactly how you want the pages to read, then convert. Nothing gets reordered automatically.
Is anything uploaded to a server to build the PDF?
No. Conversion runs locally through a WebAssembly module loaded into your browser tab. Your image bytes are read on your device, assembled into a PDF there, and handed back as a download — none of it travels over the network.
Does converting a JPG to PDF reduce its quality?
No. A JPG is embedded into the PDF exactly as it already is, without being decoded and re-saved — so there's no generation loss and no recompression, no matter how many times you run it through this tool. PNG and WebP images are decoded and rebuilt losslessly inside the PDF, so they don't pick up any new compression artifacts either.
What happens to a PNG or WebP with a transparent background?
The transparent areas are filled in with solid white before the image becomes a PDF page. PDF pages don't support see-through transparency the way PNG does, so any pixel that was partially or fully transparent is blended against white rather than left as a hole or turned an unexpected color.
What's the difference between the image-size page option and A4?
Image-size makes each PDF page exactly match that image's own pixel dimensions, so there's no border and no scaling. A4 (portrait or landscape) gives every page the same fixed size instead, with each image scaled down to fit and centered — useful when you're combining photos of different dimensions and want a uniform, printable result.
How many images can I combine into one PDF?
There's no fixed cap — a handful of photos or a few dozen scanned pages both work the same way. The practical limit is your browser tab's available memory, since every image is held in memory while the PDF is built. You'll see a heads-up once your combined files pass roughly 100 MB, but smaller batches finish in a moment.