Sign PDF Online for Free

Sign PDF files securely with our completely free online tool—no sign-ups, no limits, and accessible to everyone. Signing a PDF involves adding a digital signature, initials, or electronic mark to a document, verifying authenticity, agreement, or ownership without printing or scanning, while ensuring the file remains legally binding and tamper-evident. Perfect for contracts, forms, or agreements in business, legal, or personal contexts, our intuitive interface lets you upload your PDF, draw or type your signature, position it precisely on the page, add dates or text if needed, and download the signed document instantly.

We support standard PDF formats up to 100MB, with fast processing on any device including mobiles. Backed by HTTPS encryption and automatic file deletion after use, your privacy is guaranteed. Forget costly software or subscriptions—our service is 100% free, simplifying your workflow. Discover more complimentary PDF tools like protecting, unlocking, or editing to handle all your document needs efficiently.