Extract text from BAC files
To convert your BAC file to another format, you need Revenue Online Service or other Backup software.
To convert other file formats to the "Tax Certificate Archive" file type, you need software like Revenue Online Service or a similar tool.
A .BAC file typically represents a backup archive, with the most specific and common variation being a digital certificate backup generated by the Irish Revenue Commissioners for their Revenue Online Service (ROS). These files are critical for authenticating users to file taxes online but suffer from significant usability constraints: they are often encrypted, proprietary, and cannot be opened by standard text editors or browsers without the specific import password. Users frequently encounter friction when moving between computers, as the operating system does not natively recognize the .BAC extension, leaving the file inaccessible. Beyond tax certificates, the extension is widely used as a generic container for software backups (often just renamed ZIP files), industrial automation scripts from COPA-DATA, and game saves for titles like Batman: Arkham City.
To resolve access issues, the best conversion target depends heavily on the file's origin. For generic backups, renaming the file to ZIP or converting to a standard archive format allows for immediate extraction of contents. For ROS files, the primary goal is often restoration (importing back into the browser) or conversion to a standard P12 Personal Information Exchange format for broader compatibility with modern email clients and web browsers. For script or log backups, converting to TXT or PDF ensures the data can be archived and read without the original legacy software.
Convert.Guru analyzes your BAC file, detects the exact format, and lets you read the text inside.
Users also converted BAK, P12, ES3, PDF, BACKUP, DWG, XML, ZIP, CDW, JPG, PRN, TMDX and FLP files.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our BAC converter.