How to sign a PDF with your ArgosData certificate

Sign PDFs with your ArgosData (.p12) certificate from the browser, free and with nothing to install. Compatible with ArgosData natural-person certificates.

By IDK Manager Team ·

ArgosData is an ARCOTEL-accredited certification authority that issues electronic-signature certificates in Ecuador, common among natural persons. If you have your ArgosData certificate as a .p12 file, this guide shows how to sign your PDFs free, in your browser, with nothing to install — including on your phone.

Total time: 2-3 minutes per PDF.

What you need

  • Your ArgosData certificate as a .p12 / .pfx file and its password.
  • The PDF you want to sign.
  • A modern browser (Chrome, Firefox, Safari, Edge).

How to sign

The flow is the same as how to sign a PDF on firmar.ec, using your ArgosData .p12. Everything happens in your browser — your private key is never uploaded to any server.

  1. Open app.firmar.ec/firmar.
  2. Load the PDF and place the visible seal (with your name, “ArgosData” as issuer and a verification QR).
  3. Upload your ArgosData .p12 and enter the password.
  4. Review the summary and press Sign PDF.
  5. Download the <document>-firmado.pdf or share it.

Want to check your certificate before a filing? Use Validate certificate: it shows the holder, ID/RUC, validity and that the ArgosData chain links to its ARCOTEL-accredited root.

After signing

Validate your own signature at app.firmar.ec/verificar: it confirms integrity, issuer and revocation. The result is PAdES Baseline B-B (ETSI EN 319 142-1), valid in Adobe Reader, the MINTEL validator and any standard PAdES verifier.

FAQ

Is it free? Yes. firmar.ec is free for personal use and open source (AGPL-3.0).

Does it work on mobile? Yes, on any modern mobile browser, with no apps to install.

What if my .p12 ships leaf-only? firmar.ec completes the chain automatically using its bundled intermediate CAs.