Sign PDF online for free.
NibSign is a free online PDF signing tool. Upload a PDF, add signature fields, send a secure link, and receive the completed signed document with a full audit trail.
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Upload and prepare your PDF
Drag the PDF you need signed into NibSign. Your document is stored privately in your account — no public browsing.
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Add signature fields exactly where needed
Place signatures, initials, dates, names, text fields, and checkboxes wherever the document needs them.
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Send a secure signing link
Add recipients and send. Each signer receives a unique, signer-specific link by email.
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Collect signatures online
Recipients open the link in their browser, review the PDF, and sign. No account, no download, no friction.
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Download the completed signed PDF
Once everyone signs, the final PDF is stored in your dashboard and emailed to all parties automatically.
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Keep a full audit record
Every step — sent, viewed, signed, completed — is captured with timestamps for a clear signing history.
Free PDF signing without the enterprise overhead
Most digital signing tools charge per-document or per-user fees that don't make sense for everyday paperwork. NibSign is a free PDF signature tool built for individuals, freelancers, and small teams who just need to get a PDF signed quickly.
There are no credit cards, no enterprise sales calls, and no surprise limits when you send your first document for signature.
Everything you'd expect from paid e-signature software
Behind the simple flow, NibSign includes the features you actually need: secure signing links scoped to each recipient, multi-signer PDF signing for documents that need more than one signature, sender signing, status tracking, and an electronic signature audit trail on every completed PDF.
Electronic signature laws vary by jurisdiction. Users should seek legal advice for regulated, high-value, or jurisdiction-specific documents.