ExtraProof Writer

Explore ExtraProof together.

We are looking for an education pilot partner. Writer is not currently available as a public download. We agree on the writing environment and access for an evaluation together.

Access for pilot partners

Before a pilot, we agree on access and check installation together before participants start writing.

01 / macOS

Writer for macOS

Planned for a pilot

Record writing sessions and share signed evidence.

02 / Windows

Writer for Windows

Acceptance pending

Your starting point for documenting writing on a Windows PC.

System requirements

  • macOS 14 or later. Writer accompanies the writing app you choose; the Word add-in uses the local ExtraProof app on macOS.
  • Installation on Windows devices and the Word integration need acceptance in the specific environment before an evaluation.
  • Verify needs only a current browser with secure execution (HTTPS). No installation, no account.

Do you want to verify evidence?

You do not need to install Writer for that. Open Verify and select the record and, if needed, its associated file. Verification runs locally in the browser.

Extraara is a member of the Content Authenticity Initiative.

C2PA interoperability in development

Standards and trust
Content Authenticity InitiativeExtraara