iPhone & iPad doesn't ship a built-in sign a pdf feature for PDFs in 2026 — but PDFWix does it for free in any modern browser. No install, no signup, no watermark on the result. Here's the fastest way to get it done.

Step by step

1. 1

   Open Safari or Chrome on your iPhone or iPad.

2. 2

   Tap pdfwix.com and choose the tool.

3. 3

   Tap 'Select file' and pick your PDF from Files, iCloud Drive, Photos or another app via the share sheet.

4. 4

   Tap the action button — processing happens on-device when possible.

5. 5

   Tap Download, then 'Save to Files' or share via AirDrop.