S4P Converter

Extract text from 4-port S-parameter files (S4P)


Drop or upload your .S4P file
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How to extract text from your S4P file

  1. Click the "Select File" button above, and choose your S4P file.
  2. You’ll see a preview, if available.
  3. Click the "Convert file to..." button to extract text information.

Convert S4P to another file type

To convert S4P S-parameter files to another format, you need Keysight ADS or other Data software.

Convert a file to S4P

To convert other file formats to the "Touchstone S-Parameter File" file type, you need software like Keysight ADS or a similar tool.


About S4P files

The .s4p file contains S-parameters (Scattering parameters) for a 4-port electrical network. It relies on the standard Touchstone format to store high-frequency RF and microwave engineering data. These files are typically generated by physical testing hardware like the Agilent E5071C Network Analyzer or simulated in professional EDA software such as Keysight Advanced Design System (ADS). While an .s4p file is technically plain text, its rigid internal matrix formatting makes it highly impractical for general data analysis. The primary disadvantage of this format is its proprietary nature within engineering circles. Users without an expensive RF simulation software license cannot natively plot or visualize the complex frequency, magnitude, and phase matrices. Attempting to parse Touchstone formatting manually in Notepad is tedious and prone to formatting errors. To make this data usable for clients, managers, or general data science tools, you should convert the .s4p to CSV or XLSX. This breaks down the scattering matrices into standard columns that can be instantly graphed in Excel or analyzed with Python. Drop your file here to view and convert it securely right in your browser.

Convert.Guru analyzes your S4P file, detects the exact format, and lets you read the text inside.

Users also converted S2P, S1P and ST1H files.


FAQ

If you want to convert S4P file to , you can use Keysight ADS or similar software from the "RF Network Parameter Storage" category. In the File menu, look for Save As… or Export….

To convert files to S4P, try Keysight ADS or another comparable tool in the "RF Network Parameter Storage" category.



The S4P 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 S4P converter.