iPad makes signing PDFs genuinely easy — Apple has built signature support directly into the Files app and Safari, and the Apple Pencil turns the process into something close to signing a paper document. Here's how to do it across different scenarios.
How to Sign a PDF on iPad Using Markup
Open the PDF in the Files app. Tap the Markup icon (the pen tip icon in the top-right corner). Tap the + button at the bottom-right of the Markup toolbar and select Signature. If you've created a signature before, it appears here — tap it to insert it. If not, tap Add or Remove Signature to draw a new one with your finger or Apple Pencil.
Once inserted, drag the signature to the correct position on the page and resize it by dragging the handles. Tap Done when finished, and the signature is saved into the PDF. The file updates in place — no separate download needed.
Signing a PDF on iPad With Apple Pencil
If you have an Apple Pencil, the signing experience is noticeably better than using a finger. The pressure sensitivity and precision make your drawn signature look much closer to your actual handwriting. In the Markup signature dialog, draw with the Pencil directly on the signature canvas — you'll see the difference immediately compared to a finger-drawn version.
iPad also lets you save multiple signatures in the Markup tool. If you sign documents regularly — both personal and professional — it's worth saving a version for each context so you can insert the right one quickly without redrawing each time.
Signing a PDF in Mail on iPad
If someone sends you a PDF attachment in the Mail app, you can sign it without leaving Mail. Tap the attachment to open it, then tap the Markup icon. Follow the same steps as above — add your signature, position it, and tap Done. The signed file is automatically added as a reply attachment, ready to send back.
This workflow is one of the most efficient ways to handle document signing on the go — you receive, sign, and return the document all from one app in under a minute.
Signing PDFs With a Third-Party App on iPad
For more complex signing needs — multiple signers, signature fields, audit trails — third-party apps like Adobe Acrobat, DocuSign, or WukongPDF's PDF Sign tool (via Safari) give you more control than the built-in Markup tool. These are better suited for business contracts where you need a verifiable record of who signed and when.
Adobe Acrobat for iPad supports form field detection — it automatically identifies signature fields in a PDF so you don't need to manually position your signature. This is useful for standardized forms and legal documents that already have designated signing areas.
Is a Signature Added on iPad Legally Valid?
Yes — an electronic signature added using iPad's Markup tool or a PDF Sign app is legally valid for most personal and business documents under laws like the US ESIGN Act and the EU's eIDAS regulation. The device used to sign doesn't affect validity; what matters is that the signature represents your intent to agree.
For documents with specific authentication requirements — certain government filings, notarized documents, or high-value financial transactions — a certified e-signature platform that provides an identity-verified audit trail offers stronger legal standing than a drawn signature alone.