RapidHow to Sign a PDF on iPhone — Free, No App Needed
Draw, type, or upload your signature onto any PDF right in Safari — no app download, no account, no upload.
How to sign a PDF on iPhone is something people need constantly — lease agreements, job offer letters, school forms, NDA documents. The App Store is full of e-signature apps that want a subscription. Here are the free options, starting with the fastest.
Method 1: Use RapidTools in Safari (Fastest, Most Private)
No app install, no account, no upload to any server. Works on any iPhone running Safari.
- Open Safari on your iPhone.
- Go to rapidtools.online/sign-pdf.
- Tap the upload area and select your PDF from Files, iCloud Drive, or recent downloads.
- Tap the Signature tool in the toolbar.
- Choose how to create your signature:
- Draw — use your finger to sign directly on screen
- Type — enter your name in a handwriting-style font
- Upload — photograph your handwritten signature and upload as an image
- Drag the signature to the correct position on the page. Pinch to resize.
- Tap Download. The signed PDF saves to your Downloads folder in Files.
Method 2: iPhone Files App + Markup (Built-In)
iOS has a basic built-in signing option via the Markup tool. It is simpler than RapidTools but requires no internet connection.
- Open the Files app and locate your PDF.
- Tap the PDF to open it.
- Tap the Share button (box with arrow) → tap Markup.
- Tap the + button at the bottom right → tap Signature.
- Draw your signature with your finger on the signature canvas → tap Done.
- The signature appears on the page — drag it to position, resize if needed.
- Tap Done → Save File.
Limitation: The Markup signature is saved as an image layer. It looks fine but does not embed into the PDF structure the way a proper e-sign tool does. For most everyday documents it is perfectly fine — for legal-critical documents, use Method 1.
Method 3: Mail App (For PDFs Received by Email)
If the PDF arrived as an email attachment, iOS has an even faster shortcut:
- Open the email and tap the PDF attachment.
- Tap the Markup icon (pen in circle) in the top right.
- Tap + → Signature → draw or select a saved signature.
- Position it, tap Done.
- iOS asks if you want to Reply with Markup or Save to Files. Choose accordingly.
Method Comparison
| Method | App needed? | Internet? | Draw/Type/Upload? | Privacy |
|---|---|---|---|---|
| RapidTools (Safari) | No | Yes | All three | Local only |
| Files App + Markup | Files (built-in) | No | Draw only | Local only |
| Mail App Markup | Mail (built-in) | No | Draw only | Local only |
Is a Finger-Drawn Signature Legally Valid?
Yes — in most countries and for most document types. Here is the quick summary:
- USA: The ESIGN Act (2000) gives electronic signatures the same legal weight as handwritten ones for the vast majority of contracts and agreements.
- EU: eIDAS regulation recognises electronic signatures. A simple electronic signature (like a drawn one) is valid for most documents.
- UK, Canada, Australia: Similar legislation recognises e-signatures for commercial and personal documents.
Exceptions: Wills, property transfers, powers of attorney, and some court documents may still require wet (ink) signatures depending on jurisdiction. When in doubt for high-stakes legal documents, check with a lawyer.
For other devices and methods, see how to sign a PDF. On iPhone, you can also read how to fill out a PDF form on iPhone.
Frequently Asked Questions
How do I sign a PDF on iPhone for free?
Open rapidtools.online/sign-pdf in Safari. Upload your PDF, draw or type your signature, place it on the document, and tap Download. No app, no account needed.
Can I sign a PDF on iPhone without downloading an app?
Yes — two ways. Use RapidTools in Safari (more options, any PDF), or use the built-in Markup tool via the Files app (no internet needed, draw only).
How do I save a signed PDF to my iPhone?
After signing in RapidTools, tap Download — the file saves to your Downloads folder in the Files app. From Files you can share it via Mail, AirDrop, WhatsApp, or any other app.
What if I need to sign multiple pages?
In RapidTools, navigate between pages using the page controls and add your signature to each page that needs it. For the Files Markup method, scroll to each page and add the signature annotation there.
Is my signature stored anywhere?
With RapidTools, no — everything runs locally in your browser. The Files Markup tool saves a signature style for reuse in the iOS Signatures system, but your PDF is never uploaded anywhere.