SIGN PDF
Sign PDFs from Your Phone
PDFix lets you add your signature to a PDF directly on your phone. Draw it, type it, or upload an existing signature image, then place it on the page.
Scan to install on your phone
- Draw, type, or upload
- iPhone, iPad & Android
- On-device processing
Sign When a Computer Is Not Handy
Documents that need a signature often arrive while you are away from a desk. PDFix lets you open the PDF on your phone and add your signature there.
01
Signatures do not wait for a desk
Forms and agreements show up by email or messaging when you only have your phone - not a desktop PDF workflow.
02
Add your signature on the phone
Open the PDF in PDFix, create or select a signature, and place it on the page before you send the file back.
03
Signing that works on a phone
Draw, type, or upload a signature with touch-friendly controls that work on iPhone, iPad, and Android.
Draw, type, or upload a signature
Draw it, type it, or upload an image, then put it on the page and resize it.
Draw your signature
Create a signature directly with touch input - freehand on the screen.
Type your signature
Enter a typed signature with font styling when you prefer text over handwriting.
Upload your signature
Use an existing signature image from your gallery instead of creating a new one.
Place and scale
Position the signature on the page and scale it to fit. Placement is manual - PDFix does not auto-detect signature fields.
How to Sign a PDF on Your Phone
Open the PDF, add your signature, then share it.
- 1
Open your PDF
Launch Sign PDF from the PDFix home screen and pick the document from your device storage.
- 2
Create or select your signature
Draw freehand, type a styled signature, or upload an image from your gallery.
- 3
Place and scale it
Put the signature on the page and scale it to the right size.
- 4
Save or share
Keep the signed PDF on your device and share it when you are ready - processing stays on your phone.
Practical ways to sign PDFs on your phone
Everyday mobile signing - not enterprise signature theater.
Sign forms while away from a computer
Open a PDF on your phone and add your signature without waiting until you are back at a desk.
Sign documents from email or messaging
When a file arrives on your phone, sign it in PDFix and send it back from the same device.
Add a signature before sending a document back
Place your signature, adjust the size, and share the signed PDF when you are ready.
Handle paperwork while traveling
Sign PDFs from an Android phone or iPhone when you are on the road and only have your mobile device.
Sign PDFs on iPhone, iPad, and Android
PDFix Sign PDF works across both major mobile platforms. Pick the landing page that matches your device, or get help if you need it.
- Sign PDFs on iPhone and iPad
App Store-focused overview of PDFix for iOS devices.
- Sign PDFs on Android
Google Play-focused overview of PDFix for Android phones.
- Edit PDF text on your phone
Change existing PDF text in place when a document needs more than a signature.
- Annotate and highlight PDFs
Mark up PDFs with pen, highlighter, and shapes when a signature alone is not enough.
- Scan documents to PDF with OCR
Camera or gallery import, multi-page review, optional on-device searchable OCR.
- See all PDFix tools
See all 15 tools, pricing, and how on-device PDF editing works.
- PDFix support
Contact support if you need help with the app or your subscription.
Your PDFs, Processed on Your Device
PDF processing stays on the phone. Files are not uploaded to Cloud for edit / convert / scan / sign.
- Sign operations process files on your device
- PDF files are not uploaded to Cloud for those tool operations
- Subscriptions and account profiles follow your login across devices. PDF files themselves do not upload or sync to the cloud.
The app may still use the network for App Store or Google Play receipts, Free-tier ads, crash and performance diagnostics, push notifications, and optional account sign-in.
Frequently Asked Questions
Straight answers about signing PDFs with PDFix on your phone.
Yes. PDFix Sign PDF lets you add a signature to a PDF on your phone. Draw, type, or upload a signature, then place it on the page.
Download PDFix
Get the mobile PDF signature app for iPhone, iPad, and Android. Free to download, with optional Premium and no ads.
- Sign PDFs on your phone
- Draw, type, or upload a signature
- Free accounts can use other PDF tools on up to 2 PDFs per day.
- Available on App Store and Google Play
- PDF processing stays on your device
- Optional Premium: no ads
Scan to install on your phone
Optional Premium is available in-app via Apple or Google Play at display prices of $3.99 per month or $20.99 per year. No browser upload required.