iPhone PDF guide

How to Sign a PDF on iPhone

Place a saved or newly created signature on a PDF and export a separate signed copy from your iPhone.

Quick answer

Open the PDF in a signing tool, create or select a signature, place it on the correct signature line, resize it carefully, review every page, and export the signed copy.

Step-by-step instructions

  1. Open the correct PDF

    Confirm the filename and document version before adding a signature.

  2. Choose the signing tool

    Open the PDF signature workflow in PDF Scanner.

  3. Create or select a signature

    Draw a new signature or use one you previously saved.

  4. Place it on the document

    Move the signature to the intended line and resize it without covering nearby text.

  5. Review every page

    Check the signature position, required dates, initials, and any other fields.

  6. Export a signed copy

    Save the result with a new filename so the unsigned original remains available.

Tips for a better result

  • Confirm that an electronic signature is acceptable for the specific document.
  • Do not reuse a signature on a document you have not reviewed fully.
  • Use a filename that clearly distinguishes signed and unsigned versions.

Use PDF Scanner on iPhone or iPad

The app combines this workflow with scanning, OCR, conversion, page tools, compression, and signing. Feature names and screen labels can change between versions.

View on the App Store

Frequently asked questions

Can I save a signature for later?

The App Store listing says the app can create and save a signature for placement on PDF documents.

Does adding an image of a signature create a digital certificate?

No. A visual electronic signature is not the same as a cryptographic digital signature or certificate.

Should I overwrite the original PDF?

Keeping a separate signed copy makes it easier to recover the unsigned source and compare versions.