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AutofirmaJSignPdf
Free

Free, published by the Spanish government.

 Free

Free and open source under the MPL-2.0 and LGPL-2.1.

Windows, macOS, Linux, Android Windows, macOS, Linux, Command line
  • Works with Spanish e-government signing procedures from the browser
  • Builds for Windows, macOS, several Linux distributions and Android
  • Visible signatures with a live preview
  • Timestamps plus CRL and OCSP revocation checks
  • Mainly useful for Spanish administrative procedures
  • Documentation and site are in Spanish
  • Requires Java 21 or later
  • Focused on signing rather than general PDF editing
Downloadable app Downloadable app
Closed source Open source
License not stated License: MPL-2.0 AND LGPL-2.1-only
No account needed No account needed
Not stated if it works offline Not stated if it works offline

Checked October 1, 2026

Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.