Whether you've just photographed a receipt, a signed form, or a whiteboard full of notes, converting a JPG to PDF on iPhone is something you'll need to do regularly. The good news: you don't need an app. Here are the three best ways to do it.
Method 1: Use a Free Online Converter (Works in Safari — No App Required)
The fastest method that works on any iPhone without downloading anything:
- Open Safari on your iPhone
- Go to morphninja.com/tools/jpg-to-pdf
- Tap the upload area and choose your photo from your camera roll
- Tap Convert
- Tap Download — the PDF saves to your Files app
The whole process takes about 15 seconds. No account needed, no ads, and the file is automatically deleted from the server after 1 hour.
This method also works for multiple photos at once — perfect for multi-page documents like contracts or receipts photographed page by page.
Method 2: Use the iPhone's Built-In Print Function
iOS has a hidden feature that lets you "print to PDF" from the Photos app:
- Open the Photos app and find your image
- Tap the Share button (the square with an arrow pointing up)
- Scroll down and tap Print
- On the print preview screen, use a pinch-out gesture (spread two fingers apart) to zoom in — this converts the preview to a PDF
- Tap the Share button that appears and save to Files
This is a fully offline method with no internet required. The downside: it only works one image at a time, and the pinch-out trick feels unintuitive the first time.
Method 3: Use the Files App (iOS 16+)
If your image is already saved in the Files app:
- Open the Files app
- Long-press your JPG image
- Tap Quick Actions
- Tap Create PDF
A PDF version appears in the same folder. Fast and offline — but again, one image at a time.
Which Method Is Best?
- Multiple photos → one PDF: Use MorphNinja (Method 1)
- No internet available: Use Print trick (Method 2) or Files app (Method 3)
- Single photo, fastest route: Files app Quick Action (Method 3)
- Need to email or upload the PDF immediately after: Use MorphNinja (Method 1) — the file saves directly to Files and can be shared right away
How to Convert Multiple JPGs to One PDF on iPhone
Neither of the built-in iOS methods supports combining multiple images into a single PDF. For that, use MorphNinja's JPG to PDF converter:
- Go to morphninja.com/tools/jpg-to-pdf in Safari
- Tap the upload area and select multiple photos from your camera roll
- Tap Convert — all images are combined into one PDF in the order you selected them
- Download the result to your Files app
This is especially useful for multi-page documents you've photographed one page at a time.
How to Convert PNG to PDF on iPhone
The same methods work for PNG images. MorphNinja also has a dedicated PNG to PDF converter if you need to convert PNG screenshots or graphics with transparent backgrounds.
How to Share the PDF After Converting
Once the PDF is saved to your Files app, you can:
- Email it — tap and hold the file in Files, tap Share, choose Mail
- AirDrop it — share directly to a nearby Mac or iPhone
- Upload to Google Drive or Dropbox — through the share sheet
- Attach it to a WhatsApp or iMessage — use the Files attachment button in the app
Frequently Asked Questions
Does converting a JPG to PDF reduce the image quality?
No. Converting a JPG to PDF wraps the image in a PDF container without re-compressing it. The visual quality stays exactly the same.
Can I convert a Live Photo to PDF on iPhone?
Yes — the converter uses the still frame of the Live Photo, not the video. The resulting PDF is a standard image-based PDF.
How do I convert a screenshot to PDF on iPhone?
Screenshots are PNG files. Use the Files app Quick Action (Method 3) or MorphNinja's PNG to PDF tool in Safari.
Is there a file size limit for converting on iPhone?
MorphNinja's free tier supports files up to 5 MB. High-resolution iPhone photos are typically 3–8 MB. For larger photos, a Pro account unlocks 50 MB file support.
Can I convert a HEIC photo to PDF on iPhone?
iPhones save photos in HEIC format by default. When you select a HEIC image to upload, iOS automatically converts it to JPG for sharing — so it works seamlessly with any online converter including MorphNinja.