You've photographed your documents. Passport, utility bill, payslip, bank statement — whatever was asked for. The upload form says "PDF only." Not JPEG. Not PNG. Definitely not HEIC.
This happens constantly with banks, insurance companies, government portals, HR departments, and essentially any organisation whose document management software was built more than a few years ago. The fix is fast once you know it.
The quickest options by device
iPhone
There's a built-in option that most people don't know about. Open Photos, select your image, tap the Share button. In the share sheet, tap Print. On the print preview screen, use a pinch-zoom gesture — spread two fingers apart on the preview thumbnail. Instead of zooming into the preview, this opens it as a full PDF. From there you can tap Share again and save it to Files, or send it directly to the portal.
It's genuinely unintuitive, but it works without installing anything.
Android
The steps vary by manufacturer, but on most Android phones: open the image in your gallery app, tap the share or more options menu, and look for a Print or Save as PDF option. On Samsung devices it's usually under the three-dot menu. If none of that works, opening the image in Chrome and using Chrome's Print → Save as PDF works reliably.
Any device, from a browser
The most consistent option regardless of device or OS: use the JPG to PDF converter in your phone's browser. Upload your image, download the PDF. No app install, no account, works from Safari and Chrome on any phone.
WhatsApp photos specifically
WhatsApp photos are a common scenario — someone sends you a document photo via WhatsApp, and now you need it as a PDF. On Android, WhatsApp images are saved to a "WhatsApp Images" folder and are standard JPEGs. On iPhone, they're saved to your camera roll when you tap the download button. Either way, they're just image files and any JPG-to-PDF conversion handles them.
Combining multiple photos into one PDF
A lot of submission forms want everything in a single file: front and back of an ID, two pages of a statement, a form plus a supporting letter. The Images to PDF tool lets you upload multiple images at once — each becomes a page in the output PDF, in the order you selected them.
On most phones, you can tap to select files one at a time in the order you want them to appear. The output PDF keeps that order.
What to do if the PDF is too large
Smartphone photos are high resolution. A PDF built from a few smartphone photos can be 10–20 MB, and a lot of portals cap uploads at 2–5 MB.
The fix: compress the images before converting to PDF. The Compress Image tool reduces file size significantly — a typical 5 MB phone photo goes to 200–500 KB at balanced quality with no visible degradation for document purposes. Compress first, then convert to PDF, and the output will comfortably fit within most portal limits.
A note on HEIC files
iPhones shoot in HEIC format by default (since iOS 11). Most portals and conversion tools don't accept HEIC. If you're having trouble uploading your photos in the first place, go to Settings → Camera → Formats and switch to "Most Compatible" — this shoots in JPEG instead. Or take the HEIC file and convert it to JPEG first, then proceed with the PDF conversion.