.PROTONDOC File Extension

Proton Docs Document

Developer Proton
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What is a PROTONDOC file?

A PROTONDOC file is a document created by Proton Docs, an online word processor included with Proton Drive. It stores a text document in an encrypted container format that users can edit and collaborate on within Proton Docs. PROTONDOC files are stored directly in a user's Proton Drive account, and the user will likely never see the .protondoc file extension.

More Information

Screenshot of a .protondoc file in Proton Drive
PROTONDOC file open in Proton Drive

Proton Docs is a web-based document editor integrated into Proton Drive that allows users to create, edit, and collaborate on text documents with end-to-end encryption. Proton Drive is Proton's encrypted cloud storage service, designed to protect files and documents from unauthorized access while enabling private sharing and syncing across devices.

When you create a new document in Proton Drive using the built-in Proton Docs editor, the app saves it as a PROTONDOC file. If you open an existing text-based file, such as a .DOCX or .TXT, in Proton Docs, a new PROTONDOC version is generated for editing within the encrypted environment.

How to open a PROTONDOC file

You can open PROTONDOC files with the Proton Docs editor included with Proton Drive (available online and as an Android or iOS app). However, you will likely not see the .protondoc file extension since Proton Drive uses it internally.

How to convert a PROTONDOC file

Proton Docs (included with Proton Drive) can convert PROTONDOC files to several file types, including the following formats:

  • .DOCX - Microsoft Word Document
  • .TXT - Plain Text File
  • .PDF - Portable Document Format
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Programs that open PROTONDOC files

Web
iOS
Android

Verified by FileInfo.com

The FileInfo.com team has independently researched the Proton Docs Document file format and Android and iOS apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

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