FirmaOK is the simplest and most secure way to sign and validate PDF documents with your electronic signature, directly from your phone and without an internet connection.
With FirmaOK, you can sign contracts, invoices, official letters, and any PDF using your digital certificate (.p12), and also verify if a signed document is authentic and complete. The entire process takes place on your device: your documents, certificates, and passwords never leave it.
✍️ DOCUMENT SIGNING
• Sign any PDF with your .p12 certificate in seconds.
• Sign visibly (with a seal) or invisibly.
• Place and adjust the seal wherever you want on the page.
• Generate PAdES-B signatures, compatible with FirmaEC, Adobe Reader, and VALIDe.
✅ SIGNATURE VALIDATION
• Verifies who signed a document and whether it was modified after signing.
• Displays the signer's information (name, ID/Tax ID number, position), the issuer, and the certificate's validity period.
• Detects timestamps and verifies document integrity.
• Works 100% offline.
🔒 PRIVACY AND SECURITY
• Works completely offline: nothing is uploaded to servers.
• Your certificates are stored encrypted and protected with device biometrics (fingerprint or Face ID).
• No ads or trackers.
• Designed with your data protection in mind.
📄 IDEAL FOR
• Professionals, businesses, and individuals who frequently sign documents.
• Electronic signature in Ecuador with certificates from accredited certification authorities.
Download FirmaOK and start signing and validating your PDF documents quickly, privately, and securely.
Need to acquire your electronic signature? Contact us via WhatsApp from the app and we'll help you.
Sign and validate PDF documents with your digital certificate, offline.