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How to Sign a PDF on iPhone

Your iPhone can sign a PDF with the built-in Markup tools, and it remembers your signature. Here’s how, when PDFee is useful instead, and what kind of signature you’re adding.

PDFee teamUpdated September 26, 2026 · 5 min readTestediPhone 14 Pro · iOS 26.6.2 · PDFee 1.6
On this page
  1. Quick answer
  2. Open the PDF
  3. Method 1 · Markup
  4. Method 2 · PDFee
  5. Check the page
  6. Share it
  7. What kind of signature
  8. Questions

Quick answer

Open the PDF, tap the Markup button, then tap + › Add Signature. Pick a saved signature or draw a new one, drag it into place and tap Done.

Want a flat, signed copy that can’t be moved around afterwards? In PDFee:
  1. 1Tap Sign PDF
  2. 2Draw and place
  3. 3Save signed PDF

Open a PDF from Files or email

Method 1 · Built in

Add a signature with Apple Markup or Preview

  1. Markup button
    Step 1With the PDF open, tap the Markup button.
  2. + › Add Signature
    Step 2In the Markup toolbar, tap + › Add Signature.
  3. Signature pad
    Step 3Tap a saved signature, or sign with your finger and tap Done.
  4. Place and resize
    Step 4Drag it into place, resize with the blue dots, then tap Done.
Method 2 · App

Place a drawn signature with PDFee

PDFee saves the signature into the page and gives you a separate signed copy, so it can’t be moved or removed later and your original stays as it was. Signing happens on your iPhone; nothing is uploaded.

  1. Open PDFee and tap Sign PDF

    Then tap Choose PDF and pick the file in Files.

    Step 1: Open PDFee and tap Sign PDF

  2. Tap Add signature and draw it

    Sign with your finger, tap Clear to start over, then tap Use.

    Step 2: Tap Add signature and draw it

  3. Drag it into place

    Move the signature to the line. Use the slider to make it bigger or smaller.

    Step 3: Drag it into place

  4. Pick the page

    For a PDF with more pages, use the arrows under the page to go to the one to sign.

    Step 4: Pick the page

  5. Tap Save signed PDF

    The signed copy opens in the share sheet, ready to send or save.

    Step 5: Tap Save signed PDF
Free and Pro for this taskChecked in PDFee 1.6
FreeSigning is included, with no watermark.
ProNothing extra for signing. Pro removes the page and merge limits elsewhere in the app.
Try PDFee on your iPhone

Check the selected page and save a copy

One page at a timePDFee signs the page you had open. To sign another page too, open the signed copy and sign again.
Right spot, right sizeZoom in on the signed copy to check the signature sits on the line.
Redraw each timePDFee doesn’t store your signature. Markup does, if you sign often.

Share the signed PDF

What kind of signature is this?

Questions

How can I sign a PDF that was emailed to me?

Tap the attachment in Mail, tap the Markup button, then tap + › Add Signature. Place it, tap Done, and reply with the signed PDF.

How do I digitally sign a PDF on my phone?

Both methods here add a drawn signature: a picture of your handwriting on the page. A certificate-based digital signature, which proves who signed, needs a dedicated e-signature service.

Can I do a digital signature on my iPhone?

You can add a handwritten-style signature with Markup or PDFee. Whether that’s accepted depends on who asks for it; check with them for official documents.

How do I sign and write on a PDF on iPhone?

In Markup, tap + and choose Add Signature for your signature or Add Text for typed text. PDFee only adds a signature.

Written and tested by the PDFee teamTested on iPhone 14 Pro, iOS 26.6.2, PDFee 1.6, September 26, 2026. Screenshots come from that test and from Apple’s iOS Simulator, with test files in place of personal ones. We update this guide when iOS or the app changes.