Sign a PDF on Your Phone Free — No App Download Required
Add your signature to any PDF on iPhone or Android in your mobile browser — no app, no subscription, no login needed.
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Why this workflow matters
Receiving a job offer letter, apartment lease, or freelance contract on your phone used to mean printing it, signing it by hand, scanning it, and emailing it back — a process that could take 30 minutes and required a printer. Or it meant paying for a monthly DocuSign subscription just to sign one document. PdfPixels Sign PDF runs entirely in your mobile browser on iPhone Safari or Android Chrome using WebAssembly — you draw, type, or upload your signature, place it on the correct page, and download a signed PDF in under two minutes with no app installation and no account creation. The file never leaves your phone, which matters for sensitive documents like employment contracts, rental agreements, and financial authorization forms.
Who this is for
- Mobile users signing job offer letters, employment contracts, or NDAs on the go
- Renters and buyers reviewing and signing lease or purchase agreements from their phone
- Freelancers and contractors approving client agreements without access to a desktop computer
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Step-by-step: sign pdf on phone free
Open PdfPixels Sign PDF in your mobile browser
On iPhone, open Safari. On Android, open Chrome. Navigate to PdfPixels Sign PDF — no app download required.
Upload the PDF from your phone
Tap the upload button and select your PDF from Files (iPhone) or Files/Downloads (Android). The document loads directly in your browser.
Draw or type your signature
Use your finger or stylus to draw a natural-looking signature on the touch canvas, or type your full legal name and select a script font.
Place signature and download
Drag your signature to the correct line on the document, resize if needed, then tap Download Signed PDF. The file saves to your phone instantly.
Practical tips
- Draw your signature in landscape orientation on your phone — the wider canvas gives you more room for natural cursive strokes.
- Use the typed signature with a script font if your drawn signature looks rough on a small phone screen — typed signatures are legally equivalent in most jurisdictions.
- Save the signed PDF to your cloud storage (iCloud Drive, Google Drive) immediately after signing so you always have a backup copy.
Common problems
Signature appears too small or in the wrong position
After placing the signature, use the resize handles to scale it to match the signature line size. Pinch-to-zoom the document to navigate to the correct page before placing.
PDF does not download after signing on iPhone
Ensure Safari is allowed to download files in iOS Settings → Safari → Downloads. Set the download location to "On My iPhone" or iCloud Drive.
FAQ
Is a typed or drawn signature on a PDF legally binding?
Yes. In the United States, the ESIGN Act and UETA recognize electronic signatures — including typed names and drawn marks — as legally binding on contracts where all parties agree to transact electronically. This covers employment contracts, leases, NDAs, and most commercial agreements.
Does my PDF get uploaded to a server when I sign it on PdfPixels?
No. The entire signing process happens inside your phone's browser memory using WebAssembly. Your document is never transmitted to any external server, making it safe for confidential contracts and personal legal agreements.
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Ready to sign pdf on phone free?
Open Sign PDF and follow the steps above. No account required for core use.