Sign a PDF
Draw your signature, drag it into place, and download the signed document.
How to Sign a PDF Online for Free
- Upload your PDF: Select your file or drag and drop it into the box above.
- Draw your signature: Use your mouse, stylus, or finger to draw on the pad. The blank space around your ink is trimmed automatically.
- Place and resize: Drag the signature onto the signature line and size it with the corner handle or the slider. Add one to any page that needs it, add two on the same page for initials, and skip the pages that need nothing.
- Download signed PDF: Click "Sign & Download PDF" to get your file instantly. Every signature is written into its page in your browser — the document never touches a server.
When to Use an Online PDF Signer
- Contract and lease signing: Sign contracts, lease agreements, NDAs, or job offer letters without printing, signing, and scanning.
- Forms and waivers: Sign permission slips, liability waivers, school forms, or intake documents straight from your browser.
- Business approvals: Authorize invoices, purchase orders, and work approvals that need a real handwritten signature rather than a typed name.
- Multi-signature documents: Handle paperwork that wants your initials on several pages and a full signature at the end — place each one where it belongs, in a single pass.
- Mobile and tablet signing: Complete documents on iPhone, iPad, or Android using touchscreen input for a natural finger or stylus signature.
- Private and confidential documents: Handle sensitive financial or legal paperwork knowing the file is never uploaded to a server or stored in the cloud.
Common PDF Signing Mistakes to Avoid
- Losing track of what you placed: Each signature belongs to one page only. The running count under the preview shows what's on the current page and on the document as a whole — check it before downloading.
- Oversizing your signature: Avoid making the signature box too large. Start around a quarter of the page width and adjust downward with the corner handle or the size slider to keep it proportional.
- Expecting cryptographic certificates: This tool applies a visible electronic signature image suited for standard contracts and agreements — it does not generate PKI or eIDAS certificate-based digital signatures.
- Uploading password-protected PDFs: Encrypted or password-restricted files cannot be processed. Remove the password in your PDF reader first.
- Drawing too small on the pad: Use most of the drawing canvas. Drawing too small forces heavy scaling, which can distort fine pen lines.
Sign a PDF — Questions
Does my document get uploaded anywhere?
No. The PDF is read by your browser and the signature is written into it with pdf-lib on your own machine. Nothing about the file is sent to a server, so there's no copy of it for anyone to keep.
Is a drawn signature legally binding?
For most everyday agreements in the US, yes — the ESIGN Act and UETA give electronic signatures the same standing as ink, and eIDAS does something similar in the EU. Some documents are carved out, wills and certain court filings among them, and a few situations call for a notary or a certificate-based digital signature instead. If the document matters, check what it requires before signing it.
Can I sign on a phone or tablet?
Yes, and it's the better way to do it. Drawing with a finger or stylus gives a far more natural signature than a mouse ever will.
Can I put signatures on more than one page?
Yes. Flip to any page and add a signature there, place two on the same page if the form needs initials as well, and skip the pages that don't need anything. One signature costs one credit; two or more on the same document cost two credits total.
Is this a digital signature with a certificate?
No. This places a picture of your signature into the page, which is what most forms, waivers, and internal approvals ask for. It carries no cryptographic audit trail, so if you've been asked specifically for a certificate-based signature, you need a different kind of tool.