How to sign a PDF on iPhone without DocuSign
I don’t think signing a form should require an account with a company you’ve never heard of, and for most documents it doesn’t. Your phone already knows how.
The built-in way
This works on anything you can open on the phone — a Mail attachment, something sitting in Files, a plain download:
- Open the PDF and tap the Markup icon — the little pen tip.
- Tap + → Signature.
- Draw one with a finger or an Apple Pencil, or reuse a signature you saved earlier.
- Drag it into place and resize with the corner handles.
- Done, then share it.
Your signature lives on the device after that first time, so signing the next thing is a two-tap job. Nothing gets uploaded, and there is no account to make.
Filling the rest of the form
If the PDF has real form fields, tap one and type. If it’s a scan — no fields, just a picture of a page — use Markup’s + → Text and drag each box into position by hand. Tedious on a long form. It still works.
When you do need DocuSign
Let’s be fair about what those services actually sell, because it is not the signature. It is a trust network: an audit trail on their server, identity checks, timestamps, and an envelope the other party accepts because of the brand on it. That is a real thing, and worth paying for when you genuinely need it.
You need it when:
- The other party requires it — plenty of firms simply will not accept anything else.
- The document might end up disputed and you want third-party evidence of who signed and when.
- Several people need to sign in order, with reminders chasing them.
- A regulation names the specific standard you have to meet.
None of that can be built into an app on your phone. Any app that claims otherwise is selling you a picture of a signature with extra confidence.
What most documents actually are
A rental agreement, a permission slip, a W-9, a contractor quote, a school form. Both sides already know each other, nobody is headed to court, and the whole requirement is a signed PDF back by Friday. That is the overwhelming majority of signing I have ever needed to do, and none of it needs a service.
The mistake to avoid
If you black something out before signing — an account number, an address — know that a drawn rectangle does not remove the text underneath it. It stays selectable, it stays copyable. I would check by opening the exported file yourself and searching for whatever you tried to hide.
Chartra — Scan, sign and redact documents. See what it does →