PDF Mikata

How to Add a Handwritten Signature to a PDF (Phone, Finger OK)

Published: Oct 19, 2026 | Updated: Oct 19, 2026 | About (Japanese)

Key points
  • Choose "Signature"
  • Sign in the box
  • Tap the page to place it

Fill In a PDF lets you place a handwritten signature on a PDF.

Steps

  1. Choose a PDF, then choose "Signature" under "What to add".
  2. Sign in the box with your finger or mouse.
  3. Tap "Clear" if you want to start over.
  4. Tap "Use this signature".
  5. Tap where you want it on the page. Adjust the size with "−" and "+".
  6. Tap "Add to the PDF and create it" and save.

Your signature data

Your signature is used only on this device. It is never saved or sent.

If the recipient specifies a method for electronic signatures, follow their instructions.
Use "Fill In a PDF: Add Text, Date, Signature and Marks" (free)

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