Click the "Select File" button above, and choose your UBJ file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert UBJ to another file type
To convert UBJ JSON files to another format, you need UBJSON Parsers or other Developer software.
Convert a file to UBJ
To convert other file formats to the "Data Serialization Format" file type, you need software like UBJSON Parsers or a similar tool.
About UBJ files
The .ubj file extension represents a Universal Binary JSON (UBJSON) file, a highly optimized binary form of the standard JSON format. Developed originally by The Buzz Media, UBJSON is built to be a smaller, faster alternative to text-based JSON while strictly maintaining a 1:1 mapping of the data model. Software engineers use it primarily for efficient network transport, mobile application payloads, and game data storage where parsing speed and minimal bandwidth are critical.
While highly efficient for machines, the primary disadvantage of a .ubj file is its complete lack of human readability. Opening a .ubj file in a standard text editor like Notepad or VS Code without plugins will only display corrupted, unintelligible binary characters. Unlike standard text JSON, it lacks native support in web browsers and requires specific programming libraries to deserialize and read the internal data.
To view, debug, or modify the contents, developers must convert .ubj files back to standard json, yaml, or xml. Converting to json is the most logical path, as it restores 100% human readability, native web browser support, and text-editor compatibility, even though it will increase the total file size.
Because UBJSON is a specialized binary serialization format, standard online text converters fail to process it, as they expect raw text strings. Often, only a dedicated UBJSON parser or the original programming environment can read the data.
Convert.Guru analyzes your UBJ file, detects the exact format, and lets you read the text inside.
FAQ
If you want to convert UBJ file to CSV, JSON, XML, YAML, YML, TOML, INI, CFG, CONF, DAT, DB or SQL, you can use UBJSON Parsers or similar software from the "Binary Data Serialization" 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 UBJ, try UBJSON Parsers or another comparable tool in the "Binary Data Serialization" category.
The UBJ 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 UBJ converter.