O2

Welcome to O2, a new way to store and organize your personal data.

O2 is open source software, released under the Mozilla Public License Version 2.0.

Getting started

Important

To work properly, O2 needs Microsoft Edge WebView2 Runtime. If it is not already installed, download it from the official webpage (the evergreen version is recommended).

In order to start to use O2 - after installing it on your computer - see the example files in the Examples directory:

• AddressBook.o2 shows how to use the rules of type E-mail address, Highlight, Internet link, Recurrence to organize contact informations and recurrences of your relatives, friends, co-workers. The example also shows how to use the relations to connect husbands with wives, brothers with sisters, companies with employees.
• PasswordWallet.o2 shows how to use the rule of type Password to create a safe place to store the credentials of your accounts. The password to open the file is password.

Install with Windows Package Manager

To install O2 with the Windows Package Manager - a.k.a. winget - use the following command:

winget install --id=maurizuki.O2 -e

Change log

Version 3.3.1

• Fix missing leading white-spaces in object notes view.

Version 3.3

• Export to HTML: the style selection is now stored in the settings and restored every time the preview is opened.
• Rich Text Format files (License.rtf, ReadMe.rtf) replaced with plain text versions.

Version 3.2

• Multi-language support (a.k.a. Italian translation) removed. The feature is deprecated and no longer supported in Delphi 12.
• Import improvement: title, description and author are now imported.
• Import from XML improvement: the file is no longer completely overwritten, as it is for the other imports.
• Export to XML improvement: the export can now be limited to the selection, as it is for the other exports.
• Export to HTML: new style sheet "Sticky Notes".
• Export to HTML: small improvements to the HTML code and CSS classes.

Version 3.1

• Cryptography enhancement: the cipher algorithm initialization vector is now randomly generated.
• New feature: custom style sheets for Export to HTML. Each .css file found in the Styles folder can be selected in the Style menu of the preview window.
• Export to HTML: new dark theme added.

Version 3.0

• Extensive source code rewrite in order to upgrade it to much modern coding techniques. This may or may not cause some bugs 🙂
• Object notes view: note text is now displayed using an Edge-based control instead of an Internet Explorer-based one.
• Export to HTML: export preview is now displayed using an Edge-based control instead of an Internet Explorer-based one.
• Object properties dialog: simplified tags management.
• Object properties dialog: the password strength indicator is now automatically displayed for fields that matches rules of type Password.

Acknowledgements

The development and deployment of O2 were made possible thanks to the following tools:

DCPCrypt Cryptographic Component Library
Copyright (C) 1999-2009 David Barton.

delphi-markdown
Copyright (C) 2011+ Health Intersections Pty Ltd.

Inno Setup
Copyright (C) 1997-2025 Jordan Russell.
Portions Copyright (C) 2000-2025 Martijn Laan.

JEDI Visual Component Library
Copyright (C) 1999-2025 the Project JEDI community.

Spring4D
Copyright (C) 2009-2025 Spring4D Team.

SZCRC32 unit
Copyright (C) 2004 Sasa Zeman.

UPX - The Ultimate Packer for eXecutables
Copyright (C) 1996-2025 Markus Oberhumer, Laszlo Molnar, John Reiser.

zxcvbn
Copyright (C) 2012-2016 Dan Wheeler and Dropbox, Inc.
Delphi porting by TCardinal.