High-intent answer

how to sign a pdf on iphone

The simplest native method: in the Photos app, tap Select, choose all the images you want, tap the Share icon, then tap Print — then pinch outward on the print preview to generate a PDF, and tap Share again to save it to Files. Alternatively, in the Files app you can tap and hold any image file and choose Quick Actions → Create PDF for a single image, or scan multiple pages in one session via the Files or Notes built-in scanner, which automatically saves all pages as one multi-page PDF.

Get ScanTo Pro on the App Store → free tool →

Short answer

The simplest native method: in the Photos app, tap Select, choose all the images you want, tap the Share icon, then tap Print — then pinch outward on the print preview to generate a PDF, and tap Share again to save it to Files. Alternatively, in the Files app you can tap and hold any image file and choose Quick Actions → Create PDF for a single image, or scan multiple pages in one session via the Files or Notes built-in scanner, which automatically saves all pages as one multi-page PDF. Dedicated scanner apps let you add, reorder, rotate, and delete pages before exporting, giving you more control than the native workaround.

ScanTo Pro does this on your iPhone: it scans to a clean PDF, runs on-device OCR, and can lock files with Face ID — a pay-once app with no subscription. Check the App Store listing for current features.

What to look for before choosing

  • Photos app: Select images → Share → Print → Pinch out → creates a multi-page PDF (no extra app needed)
  • Files app: Long-press an image → Quick Actions → Create PDF (single image only)
  • Notes/Files scanner: Scan multiple pages in one session; all pages are saved as one PDF automatically
  • Page order in the Photos Print method follows your selection order — tap images in the sequence you want
  • Dedicated scanner apps allow reordering, rotating, and deleting individual pages before export

A practical decision process

  1. Photos app: Select images → Share → Print → Pinch out → creates a multi-page PDF (no extra app needed).
  2. Files app: Long-press an image → Quick Actions → Create PDF (single image only).
  3. Notes/Files scanner: Scan multiple pages in one session; all pages are saved as one PDF automatically.
  4. Page order in the Photos Print method follows your selection order — tap images in the sequence you want.
  5. Dedicated scanner apps allow reordering, rotating, and deleting individual pages before export.

Quick comparison

NeedWhat to checkWhy it matters
Pricing modelCheck whether useful features require a subscription, a one-time unlock, or neither.The cheapest app on day one may not be cheapest after a year.
Privacy modelPrefer on-device work when the content is sensitive.Private documents, resumes, study data, and family content deserve careful handling.
Export / lock-inConfirm file formats, sharing, backup, and deletion controls.A good app should help you finish the task, not trap your work.

Where ScanTo Pro fits

ScanTo Pro is a strong fit when you want private, on-device scanning without a subscription.

Pay onceNo subscriptionOn-device

This page is an independent buying guide. App Store features and prices can change, so confirm details on the listing before purchase.

FAQ

Can I add a new page to an existing PDF on iPhone without a third-party app?

Native iOS does not offer a 'merge PDFs' feature in the Files app. You'd need a third-party PDF or scanner app to insert pages into an existing PDF.

Does the Photos → Print → Pinch method preserve image quality?

It generally preserves screen-resolution quality well, but it re-renders images at the display resolution rather than the original camera resolution, so it may not be ideal for archival-quality documents.

Is there a page limit when scanning multiple pages into one PDF on iPhone?

iOS itself imposes no hard page count limit, but very large multi-page PDFs can become slow to load and export. Most users report no issues up to 50–100 pages; performance degrades at very high page counts on older devices.