Click the "Select File" button above, and choose your FDS file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert FDS to another file type
To convert FDS ROM files to another format, you need Hitachi FL Solutions or other Data software.
Convert a file to FDS
To convert other file formats to the "Specialized Data File" file type, you need software like Hitachi FL Solutions or a similar tool.
About FDS files
A .fds file can represent several unrelated data formats, but it is most frequently a Fluorescence Spectrophotometer Data file created by Hitachi High-Tech laboratory instruments. Alternatively, it may be an Electronic Journal log file from IBM POS systems, an input file for the NIST Fire Dynamics Simulator, or a Nintendo Famicom Disk System game ROM used by emulators like FCEUX. Less commonly, medical professionals encounter it as a proprietary OCT scan file exported by Topcon imaging hardware.
These formats share a common disadvantage: they are highly specific, often undocumented, and entirely proprietary. Medical and scientific .fds files (like Topcon and Hitachi exports) contain raw, complex binary data arrays. Viewing them typically requires expensive licensed software or the original clinical workstation. Nintendo .fds files are raw binary dumps of floppy disks that require specialized emulation software. NIST simulator files are plain text but rely on a highly rigid syntax that breaks if improperly edited.
Because of these strict proprietary formats, generic online converters fail completely when trying to process .fds files. They lack the specialized libraries required to parse the lab equipment headers or medical image layers.
When conversion is possible, target formats vary wildly. Spectrophotometer data should ideally be exported to CSV or XLSX from within the native Hitachi software. NIST input files are easily edited as TXT. Game ROMs can sometimes be patched or converted to standard NES files.
Do not waste time with generic conversion tools that promise instant results for medical or scientific formats. We will analyze the file's binary signature, identify exactly which of the many .fds variations you have, and show you the underlying text or internal content. If our analysis detects a supported embedded format, viewing or conversion may still be possible.
Convert.Guru analyzes your FDS file, detects the exact format, and lets you read the text inside.
If you want to convert FDS file to NES, SHP, KML, KMZ, GPX, GEOJSON, TOPOJSON, TIF, TIFF, ECW, SID or IMG, you can use Hitachi FL Solutions or similar software from the "Data Storage and ROM Images" 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 FDS, try Hitachi FL Solutions or another comparable tool in the "Data Storage and ROM Images" category.
The FDS 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 FDS converter.