Click the "Select File" button above, and choose your CA file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert CA to another file type
To convert CA Certificates to another format, you need OpenSSL or other Encoded software.
Convert a file to CA
To convert other file formats to the "Certificate Authority Bundle" file type, you need software like OpenSSL or a similar tool.
About CA files
A .CA file is primarily a Certificate Authority bundle file containing a collection of root and intermediate certificates formatted according to the X.509 standard. Server administrators use these bundles to establish a chain of trust for SSL/TLS connections via software like OpenSSL. However, the .CA extension is notoriously ambiguous and lacks universal recognition across operating systems. Windows or macOS rarely know what to do with a .CA file by default, often treating it as a generic, unassociated document. Some systems and servers strictly require standard extensions like PEM or CRT to properly import certificates into keychains or load them into server configurations. In other scenarios, a .CA file might actually be a disguised PDF document, an Apple iOS JSON crash report, or proprietary measurement data from DataPhysics Instruments. Converting or identifying a .CA file is crucial because configuring web servers with an unreadable bundle leads to fatal SSL errors and broken websites. Users frequently need to convert .CA files to PEM, CRT, or plain TXT to verify the base64-encoded strings. Because .CA is a non-standard naming convention for these bundles, standard online converters often fail to process it, throwing unsupported format errors. Even if the file contains a proprietary database from an obscure game like Darkstone or Busy Accounting Software, our analysis detects the underlying structure so you can see exactly what you are dealing with.
Convert.Guru analyzes your CA file, detects the exact format, and lets you read the text inside.
If you want to convert CA file to US, CSV, JSON, XML, YAML, YML, TOML, INI, CFG, CONF, DAT or DB, you can use OpenSSL or similar software from the "SSL Certificate Trust Chain" category. In the File menu, look for Save As… or Export….
To convert DBF, XML, SQLITE, XLSX, SQL, TSV, ACCDB, YAML, MDB, CSV, ODS or JSON files to CA, try OpenSSL or another comparable tool in the "SSL Certificate Trust Chain" category.
The CA Converter Story
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 CA converter.