How to sign a PDF
Open your PDF and choose Signature. Draw it with your mouse, finger or stylus, type your name and pick a style, or upload a photo of your signature. It appears on the page you are viewing, where you can drag it into place and resize it from the corner. Then download the signed PDF.
Filling in PDF forms
If the PDF has fillable fields, they are highlighted so you can click and type straight into them, tick boxes and pick from lists. For forms without fields, such as a scanned page, use Text to type anywhere on the page, and Check mark to tick boxes.
By default the filled fields are locked into the page when you download, so the answers can't be changed by accident. Untick that option to keep the form editable.
Is this a legal signature?
In many countries a typed or drawn signature on a document is accepted as an electronic signature for everyday agreements such as leases, permission slips and work forms. Some documents need a certified digital signature or a wet signature instead, so check with whoever asked you to sign if you are unsure.
Privacy
Your files never leave this device. The PDF, your signature and everything you type stay in your browser and are not stored anywhere. When you close the page, they are gone.
Questions
Can I sign on my phone?
Yes. Draw your signature with your finger, then drag it into place on the page.
Can I sign a protected PDF?
Not PDFs that are locked with a password. Ask the sender for an unlocked copy.