Free electronic signature software for PDFs.

An electronic signature — sometimes called an e-signature or digital signature — is a digital mark a person applies to a document to show their agreement to its contents. It can be typed, drawn with a finger or mouse, or applied from an uploaded image.

NibSign supports all of these methods, captures who signed when, and stores a completed signed PDF for every party.

Upload a PDF or Word document, place the fields each recipient needs to complete, add one or more signers, and send. NibSign emails each signer a unique secure link they can open from any browser.

Once everyone signs, NibSign automatically assembles the completed PDF, stores it in your dashboard, and emails a copy to every party.

Forcing recipients to register slows signing down and frustrates the people you're trying to do business with. NibSign sends signers a secure, recipient-specific link so they can review and sign immediately — no sign-up, no download, no friction.

Every signing link is tied to a specific signer and a specific document. Recipients only ever see the documents assigned to them. Every meaningful event — document sent, opened, signed, completed — is captured in the audit trail with timestamps, IP address, and user agent.

Lease agreements, employment contracts, NDAs, freelance proposals, client approvals, contractor work orders, supplier agreements, consent forms, internal approvals, and the everyday paperwork that keeps small businesses moving.