Image to PDF

How to Use

Select one or more images, reorder them with the arrows if needed, choose a page size, and convert. Each image becomes its own page in the resulting PDF, centered and scaled to fit within your chosen page size and margin.

Choosing "Fit to Image" vs a Standard Size

"Fit to Image" makes each PDF page exactly match its image's proportions, no white space, no scaling. Choosing "A4" or "Letter" instead places each image centered on a standard page size, which is usually better if you plan to print the result or combine it with other standard-sized documents.

Worked Example: How an Image Gets Scaled and Centered

Say you have a landscape photo that's 1600 x 1200 pixels (a 4:3 aspect ratio) and you choose A4 with the default 20pt margin. A4 is 595 x 842 points, so the available drawing area after margins is 555 x 802 points. The tool scales the image to fill as much of that width as possible first: at full 555pt width, the image's height (preserving its aspect ratio) would come out to 416.25pt, which comfortably fits within the 802pt height limit. So the image is drawn at 555 x 416.25pt, positioned at x=20, y=212.88, dead-center both horizontally and vertically within the page.

Now take a tall portrait image, 800 x 3000 pixels. Fitting the width first would make the image way too tall to fit on the page, so the tool instead scales to fill the 802pt height limit, landing on a height of 802pt and a proportional width of 213.87pt. That gets centered at x=190.57, y=20, this is why a very tall or very wide image ends up with more white space on the sides than a photo closer to the page's own proportions. Switching the same 1600 x 1200 image to Letter (612 x 792pt) instead of A4 changes the numbers slightly, the available area becomes 572 x 752pt, and the image lands at 572 x 429pt, centered at x=20, y=181.5.

Why the Page Order Matters

Each image becomes exactly one page, in the same order it appears in the thumbnail grid. This matters most when you're assembling something like a scanned multi-page form or a photo report where sequence tells a story, a site inspection with "before," "during," and "after" shots needs to stay in that order for the final PDF to make sense. The up and down arrows on each thumbnail let you fix the order after upload without needing to re-select your files in a specific sequence from your file picker.

Common Mistakes When Converting Images to PDF

Mixing very different image sizes and picking "Fit to Image" is one common source of confusion, since each page in the resulting PDF ends up a different physical size, a wide screenshot next to a tall phone photo will produce visually inconsistent pages when scrolled through in a PDF reader. If you want every page to look uniform, pick A4 or Letter instead so every image is centered within the same fixed page dimensions regardless of its own proportions.

Another mistake is uploading heavily compressed or very low-resolution images and expecting print-quality output. Since the tool embeds images at their original resolution without upscaling, a small 400x300 pixel image will look pixelated once scaled up to fill a full A4 page, no PDF conversion step can add detail that wasn't in the source image.

A third mistake is forgetting to reorder images before converting, then having to redo the whole process after noticing pages 2 and 3 are swapped in the downloaded file. It only takes a second to glance through the thumbnail row and check the small page-number label under each image before clicking convert, which is far faster than re-uploading and re-arranging everything from scratch.

Adjusting the Margin

The margin field controls how much breathing room surrounds each image on a fixed page size, measured in points (72 per inch), the same unit used throughout this tool's other PDF utilities. A smaller margin, say 10pt, lets the image fill more of the page, useful when you want the content to feel edge-to-edge. A larger margin, 40pt or more, is closer to what you'd see in a formal printed report, with generous white space framing the photo. The margin has no effect when "Fit to Image" is selected, since that mode always sizes the page to match the image exactly with zero extra space.

Real-World Use Cases

Combining scanned receipts into a single PDF for an expense report is one of the most common uses, since most accounting systems accept a single multi-page PDF far more easily than a folder of separate JPGs. Photographers and designers use this to bundle a portfolio of work into one shareable document. Students photograph handwritten homework pages with a phone and combine them into a single PDF for submission through a learning management system that only accepts one file per assignment. Property managers and inspectors turn a batch of site photos into a single report-style PDF that can be emailed or archived as one document instead of dozens of loose image files.

Frequently Asked Questions

Can I mix JPG and PNG images in one PDF?

Yes, the tool detects each image's format automatically and embeds it correctly, so you can freely mix both formats in a single conversion.

Does this reduce image quality?

No, images are embedded at their original resolution; only their display size on the page is scaled, so quality is preserved.

Can I change the order of the images after selecting them?

Yes, each thumbnail has up and down arrow buttons to move it earlier or later in the sequence, along with an X button to remove it entirely before converting.

What file formats can I upload?

JPG and PNG only. Other formats like WEBP, HEIC, or GIF need to be converted to JPG or PNG first using an image format converter before uploading here.

Why does my image look small with extra white space around it?

That happens when you pick a fixed page size like A4 or Letter for an image with a very different aspect ratio than the page. The image is scaled down to fit fully within the margins without cropping or stretching, which leaves empty space on the shorter dimension. Switch to "Fit to Image" if you don't want any white space.

Is there a limit to how many images I can combine?

There's no hard cap in the tool itself, but very large batches (dozens of high-resolution photos) will take longer to process and produce a larger file, since everything is handled in your browser's memory rather than on a server.