Why convert JPG images to PDF?
A PDF keeps several pictures together in a fixed order and looks the same on every phone, tablet and computer. It's also the format most offices, schools, banks and online application portals ask for. Sending one PDF is far easier for the person receiving it than a string of separate photos they have to download, rotate and sort.
Converting images to PDF is useful whenever you have pages on paper or pictures on your phone that need to travel as one document:
- Assignments and notes: photograph handwritten homework page by page and submit it as a single file.
- Applications: certificates, ID cards, utility bills and letters that a portal wants as one PDF.
- Receipts and invoices: collect them for an expense claim or your own records.
- Sharing by email: one attachment instead of ten, in the order you intended.
- Printing: a PDF on A4 or Letter prints at the right size without fiddling with photo-print settings.
How to scan documents to PDF with your phone
You don't need a scanner or a separate scanning app. Your phone camera and this page are enough:
- Place the page on a flat surface that contrasts with the paper, in good daylight. Turn off the flash to avoid glare, and keep your own shadow out of the frame.
- Hold the phone directly above the page, parallel to it, so the page doesn't look like a trapezium. Fill most of the frame with the page.
- Take one photo per page. If there's a lot of background around a page, crop it in your phone's gallery editor first: this tool doesn't detect page edges or straighten pages automatically.
- Open this page in your phone's browser, add the photos, check the order and choose A4 (or US Letter in North America).
- Download the PDF. It's saved straight to your phone, ready to attach or upload.
iPhone photos in HEIC format can be added directly: there's no need to convert them to JPG first. Keep in mind that the result is a PDF made of pictures: the tool doesn't perform text recognition (OCR), so the words in your scan can be read but not searched or copied.
Choosing page size, orientation and margins
These settings decide how your images sit on the page. If you're not sure, A4 with Auto orientation and a small margin is a safe default for documents.
| Setting | Option | Best for |
|---|---|---|
| Page size | A4 | Printing and official documents in most of the world, including Pakistan, India, the UK, Europe and the Middle East |
| Page size | US Letter | Printing in the US and Canada |
| Page size | Legal | Longer US legal-size forms |
| Page size | Fit to image | On-screen reading, photo sets and screenshots. Each page takes the shape of its image, with no empty bands |
| Orientation | Auto | Mixed upright and sideways pictures. The page follows the shape of the image |
| Orientation | Portrait / Landscape | Forcing every page the same way, for example for printing a booklet |
| Margin | None | Edge-to-edge images, ideal for screen viewing |
| Margin | Small or Large | Printing (most printers can't print right to the edge) and leaving room to staple, punch or bind |
Image quality and PDF file size
A PDF made from phone photos can easily run to many megabytes, because every photo you add brings its full resolution with it. The image quality setting controls how much the pictures are compressed inside the PDF:
- High keeps the most detail. Choose it for photos you want to print or documents with small print.
- Balanced is a sensible middle ground for most documents: clear to read, noticeably lighter.
- Small file compresses the images more, which is ideal for email attachments and upload forms with size limits.
If the PDF is still too large for a portal, run it through Compress PDF, or go straight to compress PDF to 200 KB for strict upload limits. You can also shrink the photos before converting them with Compress Image.
Fixing common problems
- A page comes out sideways: photos are placed using the orientation your camera recorded, but if one still looks wrong, use the rotate button on its thumbnail before creating the PDF.
- Pages are in the wrong order: phones often add photos in the order you tapped them or newest first. Drag the thumbnails into reading order: the first thumbnail is page 1.
- The image looks small on the page: a wide photo on a portrait A4 page leaves empty space. Set orientation to Auto, reduce the margin, or choose Fit to image.
- The text is hard to read: retake the photo closer to the page and in better light, and keep image quality on High or Balanced rather than Small file.
Your photos stay on your device
The pictures people turn into PDFs are often personal: ID cards, bank documents, medical letters, signed forms. Many online converters upload those files to a server to process them. Here, the conversion code runs inside your browser, so your images are read and assembled into a PDF on your own phone or computer and are never sent to us or anyone else.
There's no account to create and nothing is stored online. Once you download the PDF it's an ordinary file on your device, so look after it as carefully as the original papers.
Tips and related tools
- Converting mainly screenshots or graphics? The PNG to PDF page has tips for tall screenshots and transparent images.
- Need to add your new pages to an existing PDF? Combine them with Merge PDF.
- Want to drop a page later? Split PDF lets you extract just the pages you want to keep.
- Going the other way? PDF to JPG turns PDF pages back into images.