How to convert a PDF on an iPhone

iOS has more document handling built in than most people realise. Before installing anything, check whether the phone already does what you need.

Built in: scan straight to PDF

The Files app has a document scanner that produces a proper multi-page PDF, with edge detection and perspective correction — far better than photographing a page.

Open Files, tap the ⋯ menu in the top right, choose Scan Documents, and photograph each page. It detects page edges, flattens the angle and cleans up the contrast. Tap Save and you get one PDF.

This is much better than taking photos and converting them, because the scanner corrects for the fact that you’re holding the phone at an angle.

Built in: print to PDF

Any app with a share sheet can produce a PDF. Tap Share → Print, then on the print preview, pinch outwards on the page thumbnail. It opens as a PDF you can save or send.

It’s an odd, undiscoverable gesture, and it works everywhere — web pages, emails, notes, tickets.

Built in: Markup and page management

Open a PDF in Files and tap the Markup icon to sign it with your finger, add text or fill in a form. In the thumbnail view you can rotate, delete and reorder pages, and insert pages from another file — basic merging, without any app.

In the browser

For conversions iOS doesn’t do — PDF to Word, or PDF to images — use the tools on this site directly in Safari or Chrome. No app install, and because everything runs in the browser, your file isn’t uploaded to a server.

• PDF to Word for editable text
• JPG to PDF to combine photos into one document
• Merge PDF to combine several files
• Compress PDF when a file won’t attach

Picking a file works through the standard iOS picker: tap the drop area, then choose Browse for Files, or Photo Library for images.

What to expect from a phone

Browser-based conversion uses your device’s memory, and iOS is aggressive about reclaiming memory from Safari tabs. In practice:

• Documents under about 10 MB are fine on any recent iPhone.
• Large or long documents may be slow, and very large ones can cause the tab to reload — iOS killing the tab to free memory.
• Keep the screen on and stay on the tab while converting. Backgrounding Safari can suspend the work.
• Close other tabs first if a file is big.

If a document is too large, split it and convert the pages you need.

The HEIC problem

iPhones shoot photos in HEIC by default, and browsers can’t decode it. If your photos aren’t accepted:

• Change the format: Settings → Camera → Formats → Most Compatible. New photos shoot as JPG.
• Convert existing ones: share the photo to Files, which usually writes a JPG. Or email it to yourself — Mail converts on send.
• Or skip it: use Files’ built-in scanner, which produces a PDF directly.

Where converted files go

Downloads from Safari land in Files → On My iPhone → Downloads, or iCloud Drive if you’ve set that as the default. If a download seems to vanish, check the Downloads arrow next to Safari’s address bar.

Converted files on this site stay available for 30 minutes, then the browser releases them. Download before you close the tab — nothing is stored on a server, so it can’t be recovered.