How to sign a PDF — in 3 steps
- 1. Add your PDF. Drop it in or click to browse. The first page appears as a preview.
- 2. Create your signature. Draw it with your mouse or finger, type your name in a handwriting style, or upload a photo of your signature or stamp.
- 3. Place and download. Click Add to page, drag it into position, resize it with the corner, then click Sign & download.
Upload a signature or stamp
Sign on white paper, take a photo, and upload it. SlimIO removes the white background so only the ink lands on the page. It works the same way for a company stamp.
Sign several pages
Use Previous and Next to move through the document and add your signature or initials wherever they are needed. To add a watermark such as COPY as well, use Watermark PDF. To send the signed file by email, compress it for email.
Sign PDF — FAQ
How do I sign a PDF for free?
Open this page, choose your PDF, and create a signature by drawing it, typing your name or uploading an image. Click Add to page, drag it into place, then click Sign & download.
Can I sign on my phone?
Yes. Draw your signature with your finger, then drag it into place on the page preview.
Can I sign more than one page?
Yes. Move between pages with Previous and Next and add your signature wherever you need it. Every placement is saved into the same PDF.
Is my PDF uploaded?
No. The PDF and your signature stay in your browser; nothing is sent to a server.
Is a signature added this way legally binding?
For many everyday documents — forms, quotes, agreements between people — a signature image is commonly accepted. It is not a certified digital signature, so for documents that legally require one, check what the recipient accepts.