Extract text from Simulation data files (FFT)
To convert FFT Data files to another format, you need LTspice or other Data software.
To convert other file formats to the "Simulation Data Log" file type, you need software like LTspice or a similar tool.
The .fft extension is a classic example of a filename indicating a mathematical method - Fast Fourier Transform - rather than a single standardized file format. In the engineering world, specifically within LTspice by Analog Devices, an .fft file contains the raw frequency domain data exported from a circuit simulation. While essential for analyzing frequency response within the simulator, these files are notoriously inconvenient for external reporting. They are often proprietary binary or specific text formats that cannot be opened by standard graphing tools, and they lock your data into the simulation environment.
Another significant use case is within Adobe Audition, where the file functions as a "Noise Print." This is a spectral fingerprint of background noise (like air conditioning hum) captured to filter audio. These are highly specific data blobs that cannot be played like MP3s or edited in other DAWs. Less commonly, you may encounter legacy IBM Final Form Text documents.
For engineers and analysts, the primary goal is data extraction. Converting LTspice .fft files to CSV (Comma Separated Values) or TXT is the standard workflow to enable plotting in Microsoft Excel, MATLAB, or Python. For documentation purposes, converting the visual representation to PDF or PNG ensures the simulation results are accessible without requiring the original CAD software.
Convert.Guru analyzes your FFT file, detects the exact format, and lets you read the text inside.
Users also converted PPTX, JFIF, TTF, PDF, JPEG, CIR, ASY, H3D, PSD, DB, DBM and POWER files.
If you want to convert FFT file to PSD, DB, DBM, POWER, DLL, SO, DYLIB, BUNDLE, PLUGIN, XPI, CRX or SAFARIEXTZ, you can use LTspice or similar software from the "Simulation Data Analysis" category. In the File menu, look for Save As… or Export….
To convert LV2, DYLIB, VST, AAX, DRV, TDE, LADSPA, BUNDLE, AU, DLL, RTAS or SO files to FFT, try LTspice or another comparable tool in the "Simulation Data Analysis" 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 FFT converter.