Extract text from DII files
To convert your DII file to another format, you need Exterro_Summation or other Data software.
To convert other file formats to the "Litigation Support Data" file type, you need software like Exterro_Summation or a similar tool.
The .DII format is primarily known as a Summation Batch Load File, a legacy text-based standard used in the legal eDiscovery industry. These files serve as the structural backbone for litigation databases, mapping document identifiers (Bates numbers) to their corresponding image paths (typically TIFF or PDF) so that legal teams can review scanned evidence in software like Exterro Summation or IPRO.
The primary friction point with .DII files is their proprietary syntax (using @T, @D, and @I tokens) which renders them unreadable to standard spreadsheet software like Microsoft Excel and incompatible with many modern review platforms that prefer the Opticon (.OPT) or Concordance (.DAT) standards. Users often encounter these files when retrieving archived cases or migrating data between litigation support platforms. To make the data usable, you typically need to convert the .DII file into a CSV for audit purposes, or a standard load file format like OPT or LFP to ensure the document links work in modern tools like Relativity.
*Note: A .DII file may also be a Laserfiche Document Index File, used for indexing scanned documents in document management systems.*
Convert.Guru analyzes your DII file, detects the exact format, and lets you read the text inside.
Users also converted DLL, PNG, EXE, SE3 and JPG files.
If you want to convert DII file to CSV, JSON, XML, YAML, YML, TOML, INI, CFG, CONF, DAT, DB or SQL, you can use Exterro_Summation or similar software from the "eDiscovery Image Load File" 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 DII, try Exterro_Summation or another comparable tool in the "eDiscovery Image Load File" category.
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 DII converter.