Sign PDF online — Fast, legal, and from any device
Upload your PDF, add signers, and you're done. No software installation, no printing, no scanning. Legal validity in Colombia and Latin America, reinforced evidentiary support with blockchain and optional video. 30-day free trial.
How do you sign a PDF online with Validocus?
The process is designed so anyone — technical or not — can sign a document in minutes from any device with a browser. No downloads, no prior configuration.
Signing PDFs online vs. printing, signing, and scanning
Many people still use the analog flow to sign PDFs: print the document, sign with a pen, scan it, and send it back by email. Compare the real cost of that process to signing online.
Print, sign, and scan
Requires a printer, a scanner or scan app, signer time (15–30 real minutes), and paper plus ink. The resulting image has no additional evidentiary value: if someone alters it in Photoshop, there is no way to detect it. The result: slow, environmentally costly, and legally weak.
Sign PDFs online with Validocus
Zero paper. Zero printer. The signer completes everything from their phone in minutes. The document ends up with a traced electronic signature, an evidence certificate (timestamp, IP, device), a hash anchored to the Avalanche blockchain, and optional video evidence. Any future alteration is mathematically detectable.
Is it legal to sign a PDF online?
Yes. In Colombia, Law 527 of 1999 and Decree 2364 of 2012 equate an electronic signature to a handwritten signature as long as three requirements are met: signer identity, document integrity, and consent. Validocus meets all three by design: identity through verified email and optional signer video, integrity through an SHA-256 hash published on blockchain, and consent through the signer's explicit action of drawing their signature. The rest of Latin America has equivalent legal frameworks: Argentina Law 25,506, Mexico NOM-151, Chile Law 19,799, Peru Law 27,269. A PDF signed in Validocus is admissible as evidence in civil, commercial, and labor proceedings across the region.
Types of documents you can sign
Virtually any PDF used day-to-day by businesses and individuals: employment contracts, addenda, service agreements, NDAs and confidentiality agreements, B2B commercial contracts, lease agreements, purchase promises, offer letters, data-processing authorizations, insurance policies, certifications, board minutes, special powers of attorney, travel authorizations, freelance contracts, commercial proposals, and quote acceptances. If it's a PDF and it needs a signature, Validocus handles it.
Use cases
Freelancers and consultants
Commercial proposals, service contracts, NDAs. Send the PDF, your client signs from a phone, and you start invoicing the same day.
SMBs without a large legal team
Employment contracts, vendor agreements, offer letters. Replace the print-and-scan workflow with a digital process without investing in infrastructure.
Students and personal documents
Travel authorizations, simple powers of attorney, lease agreements as a tenant. Sign from your phone without going to a copy shop.
Companies with remote operations
Distributed teams where signers are in different cities or countries. The PDF circulates and gets signed with no physical coordination or shipping.
How does it work?
- 1
Create a free account on Validocus (just email and password, no credit card).
- 2
Upload the PDF you want signed by dragging it onto the screen or selecting it from your device.
- 3
Define the signers with email and basic data, and position the signature fields on the document.
- 4
Each signer receives a unique link by email — opens it, reviews, draws the signature, and confirms.
- 5
Download the signed PDF with all signatures embedded, along with the evidence certificate and blockchain record.
Frequently asked questions
Do I need to install anything to sign a PDF online?
No. Validocus runs 100% in the browser, on both mobile and desktop. You don't download software, install extensions, or create local certificates. You open the signing link, view the document, and sign directly from the page. It works on Chrome, Safari, Firefox, and Edge.
How long does it take to sign a PDF online?
For the signer, between 30 seconds and 2 minutes: open the email link, review the document, draw the signature, and confirm. For you as the sender, uploading a PDF and configuring signers takes 1–2 minutes. Compare that to the traditional flow (print, sign, scan, send) which easily takes 15–30 minutes per signer and requires access to a printer and scanner.
Can more than one person sign the same PDF?
Yes. You can add as many signers as the document needs and define the order (sequential or parallel). Each one receives a unique link, signs at their own time and from their own device. When everyone is done, you receive the final PDF with all signatures, the evidence certificate, and the blockchain record.
Is it safe to sign a PDF online? What about confidentiality?
The PDF is transferred over encrypted HTTPS, stored encrypted at rest, and accessible only to authorized signers and the issuing account. Validocus does not share or sell documents. In addition, the document's hash is published on blockchain (not the content), which provides proof of existence without exposing private information.
What if the signer doesn't have a Validocus account?
They don't need one. They receive the link by email and sign as a guest. You are the one with the account and credit in Validocus; your counterparty just signs from the link. This dramatically lowers friction: your client, employee, or vendor doesn't have to register on a new platform to sign your document.
Can I sign PDFs that already have Adobe signature fields?
Yes. Validocus respects preexisting fields when defined, but it also lets you add signature fields at any position in the document using a visual editor. It works with PDFs generated by Adobe Acrobat, Word exported to PDF, scans, and basically any valid PDF file.
Sign your first PDF online in minutes
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