Pdf ToolsSign a PDF on your phone with your finger or a digital certificate
Got a contract, a proposal or a form to sign? With Pdf Tools you draw your signature on the screen, place it on the PDF and send back the signed file without printing anything.
When a document requires a digital signature, the same app signs with your certificate. Either way, the file and the signature stay on your phone.
When to use it
- You received a lease, a proposal or a consent form on WhatsApp or by email.
- Your school, landlord or HR department asked for a signed document back.
- There is no printer or scanner nearby.
- The document requires a digital signature: in that case, use Sign with a digital certificate.
How to do it, step by step
- Open the PDF in Pdf Tools, even straight from WhatsApp or email.
- In the tools menu, tap Sign PDF.
- Draw your signature with your finger and place it in the right spot.
- Save and share the signed document.
Why do it with Pdf Tools
- Sign without printing or scanning
- Digital certificate signing also available
- The document never goes through a server
- Free and ad-free
Phone app vs. PDF website
| Pdf Tools (app) | PDF websites, in general | |
|---|---|---|
| File upload | No: everything happens on the device | The file is uploaded to the site's server |
| Internet | Not needed | Needed for the whole process |
| Ads | None | Varies from site to site |
| Sign-up | Not required | Some require it for extra features |
| Usage limits | No daily limit | Many limit use on the free plan |
A drawn signature is an image of your signature on the document. It is fine for everyday paperwork but is not the same as a digital signature. For that, use Sign with a digital certificate.
Frequently asked questions
How do I sign a PDF on my phone?
Open the PDF in Pdf Tools, tap Sign PDF, draw your signature and place it on the document. Then save and share.
Is a drawn signature legally valid?
It is an image of your signature. Where a digital signature is required, use the certificate option.
Do I need internet to sign?
No. Signing happens on the device.
What is the difference between a drawn and a digital signature?
A drawn signature is an image placed on the page. A signature made with a .pfx certificate is cryptographic, is embedded in the file and appears in the signatures panel of readers such as Adobe Acrobat.
Can I sign a PDF that came by email?
Yes. Open the attachment with Pdf Tools, sign it and share it back from your email app.
Guides
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Get Pdf Tools for free
No ads, no sign-up and no uploading your files to the internet.
Get it on Google Play