To convert other file formats to the "Data Transfer Definition" file type, you need software like IBM i Access Client Solutions or a similar tool.
About TTO files
A .TTO file is a legacy data transfer request associated with IBM i Access Client Solutions (formerly Client Access for AS/400). It contains the configuration settings, SQL instructions, and field mappings required to upload data from a local workstation to an IBM i (AS/400) host database.
The real problem for users is that .TTO files are strictly definition files - they generally do not contain the actual data, but rather the instructions to move it. Additionally, modern versions of IBM's software have largely shifted to using DTT or DTX extensions, leaving .TTO files as proprietary legacy artifacts that can be difficult to execute or edit on modern systems without the specific older middleware installed. To audit, view, or document these transfer logic definitions without the IBM stack, the best practice is to convert the file to TXT or PDF. This renders the internal SQL and mapping logic human-readable for archival or migration to standard formats like CSV or SQL scripts.
Convert.Guru analyzes your TTO file, detects the exact format, and lets you read the text inside.
If you want to convert TTO file to , you can use IBM i Access Client Solutions or similar software from the "AS/400 Data Transfer Request" category. In the File menu, look for Save As… or Export….
To convert files to TTO, try IBM i Access Client Solutions or another comparable tool in the "AS/400 Data Transfer Request" category.
The TTO 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 TTO converter.