Click the "Select File" button above, and choose your TWF file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert TWF to another file type
To convert TWF documents to another format, you need Casio PC-Sync or other Data software.
Convert a file to TWF
To convert other file formats to the "Legacy Device Backup" file type, you need software like Casio PC-Sync or a similar tool.
About TWF files
The .TWF file extension has several distinct uses, making it a highly fragmented format. Its most common use is as a legacy Casio Organizer Data File created by the Casio PC-Sync software. These files hold contacts, schedules, and memos backed up from outdated digital diaries like the Casio SF series. Another major historical use is the Taikong Ti-File system, which uses .TWF as a container for technical documents, sometimes associated with legacy Toshiba Word processors. In modern workflows, .TWF files serve as Orthoimage Georeferencing files in GIS applications like Agisoft Metashape or TerraExplorer, or as Tableau Prep Workflow files. Users generally need to convert .TWF files because the legacy data formats are locked inside dead, proprietary ecosystems. Casio PC-Sync files, for example, require 32-bit Windows XP software to open natively, making data extraction on modern hardware incredibly frustrating. Furthermore, GIS georeferencing files are just plain text coordinates that are useless without their corresponding image files. For legacy Casio data, the ideal target format is .CSV or .TXT to import contacts into modern address books. For Tableau Prep workflows, you can extract the contents by simply renaming the file to .ZIP. Standard online converters routinely fail to process .TWF files because the legacy proprietary formats use undocumented binary encoding. Because the specifications are closed, basic converters cannot parse the data structure. Even if the file uses a closed binary structure, our analysis engine will inspect the file to extract underlying plain text or embedded strings. If our analysis detects a supported underlying or embedded format, like a Tableau ZIP archive, viewing or conversion may still be possible.
Convert.Guru analyzes your TWF file, detects the exact format, and lets you read the text inside.
If you want to convert TWF file to SHP, KML, KMZ, GPX, GEOJSON, TOPOJSON, TIF, TIFF, ECW, SID, IMG or DEM, you can use Casio PC-Sync or similar software from the "Legacy PDA Data Backup" category. In the File menu, look for Save As… or Export….
To convert LAZ, KMZ, DTM, CSV, DEM, PRJ, LAS, GPX, DSM, SHP, DBF or KML files to TWF, try Casio PC-Sync or another comparable tool in the "Legacy PDA Data Backup" category.
The TWF 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 TWF converter.