Prepare the photos before opening the tool
Decide which photos go in and in what order. If you are photographing documents, use good light and shoot straight on so the text is readable without zooming. A multi-page PDF works best when the photos share a similar orientation. iPhones may save photos as HEIC; when you pick them from the photo library the browser usually hands them over as JPG, but if you choose a HEIC file from Files and the tool does not accept it, switch Settings, Camera, Formats to Most Compatible for new photos, or take a screenshot of the image. Image to PDF accepts JPG, PNG and WebP.
Add the photos and put them in order
Open Image to PDF in Safari or Chrome. Tap the select button and choose photos from the library or from Files; you can add several at once. The order they appear in is the page order, so check it before creating the PDF and move any misplaced sheets with the touch controls. Remove the ones you do not need. You do not have to install an app or create an account, and the photos are not uploaded to any server: they are read in your browser’s memory.
Choose original size or A4
With original size, each page is as big as its photo, with no margins. With A4, each photo is fitted inside an A4 sheet while keeping its proportions, and the sheet follows the photo’s orientation when you choose automatic orientation. For sending documents or printing, A4 is the usual choice; for screenshots or photos that will only be viewed on screen, original size avoids white bands. JPG and PNG photos go into the PDF as they are, without recompression, so creating it costs you no quality.
400 × 200 px → 2:1
If the PDF is too heavy, reduce it
Twelve photos from a current phone can add up to tens of megabytes, and many email services reject large files. Open Compress PDF with the PDF you created and start with the balanced level: it recompresses the photos and scales down the largest ones, leaving text and vector graphics untouched. If photographed text loses sharpness, repeat with the gentle level. If the file was already optimized, the tool says so and does not produce a heavier copy. Always check the result in the recipient’s viewer.
Save the PDF and use it
When it finishes, download the file. On iPhone it lands in the Files app, usually in Downloads, and on Android in Downloads. From there you can attach it to an email or share it. If you need to join it with other PDFs, use Merge PDF; if a page is surplus, Delete PDF pages creates a copy without it. If the PDF contains personal data, work in a browser with no extensions and delete the downloaded file when you no longer need it.
A PDF from an image
Download image-400x200.png to your phone or computer and open Image to PDF. Add the image, keep the original size and create the PDF. Then open the result in PDF properties and metadata.
400 × 200 px → 2:1
The PDF has one page with a 2 to 1 proportion, the same as the 400 by 200 pixel image. Repeat with A4 and the image appears centered inside an A4 sheet without being distorted.
Compare the look of both pages in the viewer and check that the image was not stretched. This sample is small; with real phone photos the PDF will weigh much more and you may want to compress it.