Image to PDF — Combine Photos into One PDF That’s Small Enough to Send

Converting an image to PDF sounds like changing a file extension, but it is closer to printing: each picture is placed on a page that has a physical size. That is why two tools can turn the same photos into PDFs of very different sizes, and why some pages come out sideways or cropped.

A PDF Page Has a Paper Size, a Photo Only Has Pixels

A PDF page is measured in inches or millimetres; a photo is measured in pixels. Converting an image to PDF means deciding how many of those pixels each inch of paper should carry — and that decision, not the PDF format, sets the file size.

A 12-megapixel phone photo is 4,032 × 3,024 pixels and has no size of its own. On an A4 page it could carry 300 pixels per inch for print, 150 for screens, or every pixel it has.

Why the Same Photo Can Make a Small or a Huge PDF

The PDF format adds very little around an image. What you are really choosing is the resolution of the picture inside it, and the file grows roughly with the number of pixels kept.

Keep every pixel and a dozen phone photos can easily pass an email attachment limit. Resample them to what a screen can show and the same pages fit comfortably, with no visible difference at normal zoom.

One PDF from Many Images: Pages, Order and Layout

When you combine images into one document, three more choices appear: the order of the pages, the paper they sit on, and how each picture fills that paper. This image to PDF converter draws every page at its real proportions before anything is built, so those choices are visible rather than guessed.

Every picture to PDF conversion here runs in your browser tab, and every step can be revisited before you download. Nothing you add is uploaded at any point.

Step 1 — Add Your Photos, Screenshots or Scans

Drag images onto the page, click to browse, or paste a screenshot with Ctrl+V (⌘V on a Mac). JPG, PNG, WebP, HEIC, AVIF, GIF and BMP can be mixed in one batch — up to 50 images on a computer and 20 on a phone.

Each image is read once to build its page preview. Files the browser can’t open are flagged one by one, and the rest carry on.

Adding HEIC Photos Straight from an iPhone

You don’t need to convert HEIC first. The photos are decoded in the browser and placed upright, even when the camera stored them sideways, so an image to PDF job from an iPhone gallery is a single step.

Step 2 — Arrange Pages and Choose the Layout

Drag pages into order, or use the arrow buttons on each card, which also work from the keyboard. Rotate a page in quarter turns or remove it.

Then pick the paper — Fit to image, A4, US Letter, Legal or A5 — with margins and Fit or Fill. The cards redraw instantly, so what you see is what the PDF will contain.

Sorting by File Name or by the Date a Photo Was Taken

Name order is natural, so IMG_2 comes before IMG_10. Date taken reads the capture time stored in each photo, which puts a trip or a stack of receipts back in order even after the files were renamed or copied.

Step 3 — Pick a Size and Download the PDF

Choose a quality preset and, if the file has to stay under a limit, set a maximum PDF size. A live estimate shows roughly how big the document will be before you create it.

Create the PDF and download it, or switch the output to one PDF per image and download them together as a ZIP. If you change your mind, adjust the settings and create it again without adding the images a second time.

Tip: set the size limit before you start reordering pages. The estimate updates as you work, so you see straight away whether the document is heading over the limit.

The most common complaint after a photo to PDF conversion is that the result is too big to send. The cause is almost always resolution that nobody will ever see.

Megapixels Nobody Will Ever See

A 12-megapixel phone photo placed on an A4 page at 150 DPI needs only about 2 megapixels — roughly a sixth of what the camera captured — so resampling it before it goes into the PDF removes most of the data without a visible change on screen.

Those extra pixels only matter when a page is printed large or zoomed far in. For reading on a laptop or a phone, they are dead weight.

150 DPI Is Enough for Almost Every Screen

That is why Standard, at 150 DPI, is the default here. Print uses 300 DPI for pages that will go on paper, Email uses 110 DPI, and Smallest drops to 72 DPI for forms that only accept tiny files.

Original keeps every pixel. Upright JPEGs are then copied into the PDF as they are, with their metadata stripped, so nothing is compressed a second time.

Setting a Size Limit Before You Convert

If a form or mailbox has a ceiling, choose it under Maximum PDF size before you turn the images to PDF. The converter first lowers JPEG quality a little, and only when that isn’t enough does it reduce resolution — keeping as much detail as the limit allows.

It never goes below 72 DPI. If the pages still don’t fit, you get the smallest version it could make and a clear message, rather than a file that silently fails at upload.

Common Limits: Email, Job Portals and Visa Forms

Gmail attachments top out at 25 MB, and many other mail services set similar ceilings. Application portals are far stricter, often 1 or 2 MB for a whole document, which is where an image to PDF tool with a real size limit saves a second trip through a compressor.

When to Keep Original Quality Instead

Keep Original for photographs you will print large, archive scans, or pages someone will crop later. For anything that will be read on a screen, a lower preset gives the same experience at a fraction of the size.

If you need one smaller picture rather than a document, compress an image to 1 MB instead.

In any picture to PDF conversion, layout decides how each image sits on its page. The preview cards redraw as you change these options, so you can judge them before creating anything.

Fit to Image vs A4 vs US Letter

Fit to image gives every page the shape of its photo, sized so the long edge matches A4. There are no white bands, which makes it the best choice for photo sets and screenshots read on screen.

A4 (210 × 297 mm) and US Letter (8.5 × 11 in) are the right choice when a page will be printed or combined with other documents. Legal and A5 are there for the forms and booklets that need them.

Fit or Fill: Keeping the Whole Photo or Filling the Page

Fit shows the whole image inside the margins and leaves white space where the shapes differ. Fill covers the page edge to edge and trims whatever overflows, evenly from both sides.

Use Fill for photos whose edges don’t matter, and Fit for documents, receipts and anything with text near the border. If only one photo needs trimming, crop a photo before converting it.

Portrait, Landscape and Mixed Orientations

With orientation set to Auto, each page turns to match its image, so landscape photos get landscape pages inside the same document. Choose Portrait or Landscape to force every page the same way, which suits printing.

A photo to PDF conversion from a phone runs into two problems that desktop images rarely cause: they may be stored sideways, and on an iPhone they are usually HEIC files.

Why Some Photos Turn Sideways in a PDF

Cameras often save a portrait shot as landscape pixels with an EXIF Orientation tag that says how to turn it. Your gallery app reads that tag; a PDF has no equivalent, so a tool that copies the stored pixels straight in produces a page on its side.

Some tools make it worse by fitting those sideways pixels into a portrait box, which squeezes the picture as well. This converter applies the tag first, using the browser’s own orientation handling, so the page matches what you saw on your phone.

Converting iPhone HEIC Photos to PDF Without an App

iPhones have saved photos as HEIC by default since iOS 11, and plenty of PDF tools still refuse the format. Here HEIC files are decoded inside the browser and can sit in the same document as JPGs and screenshots.

If you need the photos themselves in a more widely supported format, convert HEIC to JPEG separately.

Not every image is a photograph, and treating a screenshot like one is how text in a PDF ends up blurry.

Keeping Text in Screenshots Sharp

JPEG compression is designed for photos and leaves a faint haze around hard edges such as letters and lines. Images with transparency or only a few hundred colours — screenshots, diagrams, logos — are therefore written as PNG pages, which keep those edges exact.

Photos are written as JPEG, which is far smaller for continuous tones. The choice is made per page and automatically, so converting mixed images to PDF gives each page the right format.

What Happens to Transparent Backgrounds

A PDF page is white paper. Transparent areas of a PNG show that white, whether you view the PDF on screen or print it, and never turn black.

For PNG-specific cases in more depth, read our guide to converting PNG to PDF.

Most people check what is in a photo before sharing it. Far fewer check what is stored alongside it.

EXIF Travels Inside Many PDFs

A PDF writer that copies a photo’s original bytes also copies its EXIF block, which can include the GPS coordinates of where the picture was taken. Re-encoding the image, or stripping that block before embedding it, keeps the location out of the document.

Besides position, EXIF commonly records the camera or phone model and the exact capture time. That is harmless in a family album and much less so in a picture to PDF file sent to a stranger.

How This Converter Removes It

Pages that are resampled are drawn fresh, so they carry no metadata at all. Original-quality JPEGs are embedded without their EXIF, XMP and comment segments, keeping only the colour information that affects how the picture looks.

To clean the photos themselves before sharing them anywhere else, remove EXIF data from photos first.

Most image to PDF jobs are small and urgent: a form wants one file, and you have a handful of pictures.

Receipts and Expense Reports

Photograph receipts as you collect them, sort them by date taken and combine them into one PDF for the expenses system. Fit on A4 keeps every receipt whole and printable.

Homework, Handwritten Notes and Whiteboards

Teachers and course portals usually ask for a single PDF. A photo to PDF run turns pages and whiteboards into an ordered document, and the Email preset keeps it small enough to upload.

ID Documents for Applications

Visa, rental and job applications often want both sides of an ID in one file under 1 or 2 MB. Set the limit, add the front and back, and the document never passes through a server on the way.

Checking the Result Before You Submit

Open the downloaded PDF and zoom into the smallest text that has to be legible. If it has gone soft, raise the preset or the limit slightly and create it again — your pages are still arranged.

Portfolios and Photo Handouts

Fit to image with a small margin turns a set of photos into a clean portfolio, one page per picture. When it is ready, merge PDFs to add it to a CV or cover letter.

Most online image to PDF services upload your files to their servers, convert them there and send a PDF back. Doing the work in the browser changes a few things that matter.

Your photos never leave the device, there are no daily quotas to wait out, and size limits, orientation and metadata are handled before the document exists rather than fixed afterwards.

When a Desktop App Is the Better Choice

Browser tools share your device’s memory. For very large jobs, or features this page doesn’t offer, installed software is the more comfortable option.

Hundreds of Pages or Searchable Text (OCR)

This converter takes up to 50 images at a time and produces pages of pictures, not searchable text. Scanning a whole book, or making the words in a scan selectable, is a job for a desktop PDF editor with OCR.

A finished PDF often needs one more step. Add it to other documents with merge PDF, or turn a page back into a picture with PDF to JPG.

If every image you have is already a JPG and you want the quickest possible route, the JPG to PDF converter does just that. For everything else, browse all PDF tools.