How to Combine Images into One PDF

To combine multiple images into one PDF, open an image-to-PDF tool, add all your JPG or PNG files at once, drag the thumbnails into the order you want, and export a single PDF. With imisspdf’s JPG to PDF tool the whole process runs in your browser, so your photos are never uploaded — and the result is one tidy document instead of a dozen loose image files.

This guide walks through the exact steps, how to reorder pages and set page size, what to do with iPhone HEIC photos, and why doing this in your browser keeps personal images private.

Quick steps

1. Open JPG to PDF (or PNG to PDF if your images are PNGs).
2. Add all your images at once — drag and drop them in, or select multiple files in the file picker.
3. Reorder by dragging the thumbnails until the page sequence is correct.
4. Set page size and orientation — A4 or Letter for documents, fit-to-image for photos.
5. Convert and download one combined PDF. Nothing is uploaded.

That’s the whole job. The rest of this guide explains each step and the choices along the way.

Step 1 — Add all your images

Start by gathering every image you want in the PDF. A good tool lets you add them all in one batch rather than one at a time, so select them all in the file picker (hold Shift or Ctrl/Cmd to multi-select) or drag the whole group onto the page.

You can mix formats. imisspdf’s JPG to PDF and PNG to PDF tools both accept multiple files in a single batch and can combine JPGs and PNGs together, because each image becomes one PDF page regardless of its original format. There is no limit on how many images you add, and no account is required.

Step 2 — Put the pages in the right order

Once your images are loaded, they appear as thumbnails. The page order in your final PDF follows the order of these thumbnails, so this is where you set the sequence.

To reorder, drag each thumbnail into position. Want the cover photo first and the signature page last? Drag them there. The PDF is built in exactly the order you see on screen, which matters for things like:

• A multi-page receipt set that should run in date order.
• A scanned contract whose pages must stay in sequence.
• A portfolio where the running order tells a story.

If you’ve already created the PDF and want to rearrange or rotate pages afterward, use Organize PDF, which lets you reorder, rotate, and delete pages visually. And if you need to combine your new image PDF with an existing document, Merge PDF stitches them together — both also run in your browser.

Step 3 — Choose a page size

This is the step most people skip, and it’s the one that makes a PDF look professional or awkward. You generally have two options:

• A fixed standard size (A4 or US Letter). Best when the PDF will be printed or shared formally — a scanned application, an invoice set, a contract. Each image is centered or scaled to fit the page, giving a consistent, print-ready document.
• Fit page to image. Best for on-screen viewing like a photo portfolio, because the page matches each picture’s dimensions and avoids white letterbox margins.

imisspdf’s JPG to PDF tool offers page size and orientation controls so you can match the output to its purpose. When in doubt, A4 or Letter is the safe, universally compatible default for anything document-like.

Step 4 — Convert and download

With the order and page size set, convert and download your single PDF. Because JPG to PDF runs entirely in your browser, the document is assembled on your own device and downloaded directly — there is no upload step, no waiting in a server queue, no watermark, and no account.

Common use cases

Combining images into one PDF solves a surprising number of everyday problems:

• Receipts and expenses. Snap photos of receipts and combine them into a single PDF to attach to an expense report — far cleaner than a folder of loose images.
• Scanned documents. Photograph each page of a paper form or contract and combine them into one document in the correct order. For paper originals, capturing with Scan PDF first gives a tidier, deskewed result, but combining photos directly works too.
• Portfolios and proofs. Designers, photographers, and artists combine work samples into one shareable PDF that holds its layout on any device.
• ID and application documents. Combine the front and back of an ID, plus supporting photos, into a single PDF that an office or portal can accept as one upload.
• Homework and notes. Students combine photos of handwritten pages into one PDF to submit.

In nearly all of these, the images are personal — which is exactly why where they’re processed matters.

A note on iPhone photos (HEIC)

If your images come from a recent iPhone, they may be in HEIC format rather than JPG. HEIC is efficient but not universally supported by every image-to-PDF tool, so you may need to convert it first.

imisspdf has a dedicated HEIC to PDF tool that handles iPhone photos directly — and like the others it runs in your browser. You can convert HEIC images straight to PDF, or convert them so they sit alongside your JPGs and PNGs in a combined document. Either way, your photos stay on your device.

Why combine images in your browser?

The pictures people turn into PDFs are often the most personal files they have: ID documents, receipts, medical paperwork, signed forms, and private photos. Uploading those to a third-party converter means trusting that company’s security and retention policy with sensitive images.

imisspdf takes a different approach. Its JPG to PDF, PNG to PDF, and HEIC to PDF tools run entirely in your browser using WebAssembly. The conversion, reordering, and page sizing all happen locally on your machine — the images are never uploaded, there is no account, and there is no watermark. For personal photos, this is structurally safer than any upload-based tool.

And you don’t have to take it on faith. Open your browser’s developer tools, watch the Network tab, and confirm that no file upload request is sent while you build your PDF. If nothing uploads, nothing left your device.

Tips for a clean, professional result

A combined PDF can look polished or slapdash depending on a few small choices. Before you export from JPG to PDF, it’s worth getting these right:

• Shoot or scan straight. A crooked photo becomes a crooked page. If you’re photographing documents, line the camera up square to the page; for paper originals, Scan PDF auto-straightens for you.
• Keep lighting even. Shadows and glare across a photographed page look amateurish in a PDF. Diffuse, even light gives the cleanest result.
• Match orientation. Mixing portrait and landscape images on a fixed page size leaves some pages with large empty margins. Group like orientations, or use fit-to-image so each page matches its picture.
• Crop before combining. Trim away desktop clutter or table edges so each page is just the content. A tidy crop makes the whole document look intentional.
• Decide on a consistent page size. For a document people will print or file, pick A4 or Letter and stick with it across every image so the PDF feels uniform.

These habits cost a few seconds each and are the difference between a PDF that looks like a real document and one that looks like a pile of phone photos.

After you combine: useful next steps

Once you have your single PDF, you may want to do more with it — and because everything runs in your browser, you can chain tools without ever uploading the file:

• Add or remove pages. Stitch the image PDF onto an existing document with Merge PDF, or drop unwanted pages with Organize PDF.
• Reorder after the fact. Changed your mind about the sequence? Organize PDF lets you drag pages into a new order without rebuilding from the images.
• Shrink the file. Photo-heavy PDFs can get large. If you need to email it, Compress PDF reduces the size while keeping it readable.

This is the advantage of a single in-browser toolkit: the combined PDF stays on your device through every step, so your personal images never touch a server.

Troubleshooting

• My PNG has a white box where it should be transparent. PDF pages have a solid background, so transparent PNG areas are placed on white. That’s expected — flatten or recolor the image first if you need a different background.
• The pages are in the wrong order. Drag the thumbnails before converting, or fix it afterward with Organize PDF.
• My iPhone photos won’t load. They’re probably HEIC — use HEIC to PDF instead.
• Images look stretched. Switch from a fixed page size to fit-to-image, or check the orientation setting.

Try it now

Combining images into one PDF is one of the most useful small tasks you can do with your documents — and one of the most sensitive, since the images are usually personal. Do it in your browser and you get a tidy, ordered PDF without ever uploading your photos.

Start with JPG to PDF, use PNG to PDF for screenshots and graphics, convert iPhone photos with HEIC to PDF, or stitch the result into an existing file with Merge PDF — all free, all in your browser.

Related guides

• How to Convert JPG to PDF
• How to Convert HEIC to PDF
• Combine now with the JPG to PDF tool — free, in your browser.

Frequently asked questions

Related articles