The quick way to sign a PDF on iPhone
Someone emails you a contract, a lease, or a form that needs your signature. You are on your phone, away from your computer, and you need to sign it and send it back now. You do not want to download a signing app, create an account, or wait until you get to a desktop.
Filero's Sign PDF tool works directly in your iPhone browser. No app, no account, no cost. Here is how:
- Open Safari (or Chrome) on your iPhone and go to filero.app/tools/sign-pdf.
- Tap the upload area and select your PDF from Files, iCloud Drive, or your Downloads.
- Tap the spot on the document where you need to sign.
- Use your finger to draw your signature on the screen. The touchscreen captures your natural handwriting.
- Drag the signature to position it exactly. Resize if needed.
- Tap Download to save the signed PDF to your iPhone.
You can then share the signed file directly from your Downloads by tapping the share icon and selecting Mail, Messages, or any other app.
Why use Filero instead of an app?
- No download — signing apps take up storage and require installation. Filero runs in your browser.
- No account — most signing apps require you to create an account with your email. Filero does not.
- No cost — many signing apps are free for a limited number of documents, then charge a subscription. Filero is completely free with no limits.
- Privacy — signing happens entirely in your browser. Your document is never uploaded to a server.
Tips for a better signature on iPhone
- Use your finger, not a stylus — the iPhone touchscreen responds well to finger input and produces natural strokes.
- Sign slightly larger than you normally would — you can resize the signature smaller after drawing. Starting large gives you more control.
- Hold the phone in landscape for more horizontal space when drawing your signature.
- If the result looks shaky, clear and redraw. It takes a try or two to get used to signing on glass.
Signing a PDF from your email on iPhone
The most common workflow on iPhone is receiving a document by email that needs to be signed and returned. Here is the fastest way to handle it:
- Open the email and tap the PDF attachment to preview it.
- Tap the share icon and select Save to Files.
- Open Safari and go to filero.app/tools/sign-pdf.
- Upload the PDF from your Files app, sign it, and download the signed version.
- Reply to the email and attach the signed PDF from your Downloads folder.
If the signed file is too large to email back, run it through Compress PDF first to reduce the size.
Frequently asked questions
Do I need to download an app to sign a PDF on iPhone?
No. Filero works directly in Safari or Chrome on your iPhone. Open the Sign PDF page in your browser, upload the document, draw your signature with your finger, and download the signed PDF. No app installation required.
Can I sign a PDF I received by email on my iPhone?
Yes. Save the PDF attachment from your email to your Files app, then open Filero in Safari, upload the saved PDF, sign it, and share the signed version directly from your downloads. The whole process takes about two minutes.
Does the signature look natural when drawn with my finger?
Yes. Drawing with your finger on the iPhone screen produces a natural-looking signature because of the touchscreen precision. It looks better than typing your name, and most people find it feels similar to signing on paper. If your first attempt looks shaky, clear it and try again.
Is my signed document stored on a server?
No. Signing runs entirely in your iPhone browser. Your PDF and signature are never uploaded to any server. Everything is processed locally on your device.
Is a PDF signature from my iPhone legally valid?
For most everyday documents including contracts, leases, consent forms, and business correspondence, yes. Electronic signatures carry the same legal weight as handwritten signatures under electronic transactions legislation in Australia, the US, the UK, and most countries.