How to use Sign PDF
Select the PDF first and a JPG or PNG image of your signature second. Choose the page and position, then run the tool.
What the result contains
The result places an image on the PDF; it is not a cryptographic digital signature.
Practical tip
Inspect the position and use an appropriate signing service when identity verification is required.
Frequently asked questions
Do I need an account?
No account is needed to run this tool.
Are my files uploaded?
No. Sign PDF runs in your browser, so your file is processed on your own device and is not uploaded to our server. The page only downloads the free code libraries it needs.
Should I check the downloaded file?
Yes. Open the result and confirm its pages and content before sharing or deleting your original.
When to sign a PDF online
- Everyday paperwork: permission slips, delivery forms, timesheets and simple agreements.
- Invoices and quotes: add your signature before sending a document to a client.
- Rental and membership forms: sign and return a form without printing and scanning it.
- On the go: sign from your phone or a computer without installing an app.
How to make a signature image
Sign PDF places an image of your signature on the page, so you need a JPG or PNG of your signature first. The easy way:
- Sign your name on plain white paper with a dark pen.
- Take a photo in good light, holding the phone straight above the paper.
- Crop the photo tightly around the signature.
A PNG with a transparent background looks the cleanest on the page because it has no white box around it.
Good to know before you sign
This places a picture of your signature. It is not a certified digital signature with identity checks. For mortgages, government forms or contracts that require verified e-signatures, use the signing service the sender asks for.
Why sign with PDFCloudy
Your document and your signature image never leave your device. That matters, because a signature is something you don't want stored on someone else's server.
More questions about signing PDFs
Is a signature added this way legally valid?
It depends on the document and where you live. Many everyday documents accept an image signature, while some legal and financial documents require a verified e-signature. When in doubt, ask the person who sent you the document.
Can I add initials as well as a signature?
Make a second image with your initials and run the tool again on the signed file.
The form has fields to fill in. What should I do first?
Fill in the form with PDF Forms, then add your signature here.
How do I send the signed file securely?
Add a password with Protect PDF before you email it.