ESR Converter

Extract text from Electron Spin Resonance files (ESR)


Drop or upload your .ESR file

How to extract text from your ESR file

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

Convert ESR to another file type

To convert ESR data files to another format, you need Bruker EMX Software or other Data software.

Convert a file to ESR

To convert other file formats to the "Spectrometer Data File" file type, you need software like Bruker EMX Software or a similar tool.


About ESR files

The .ESR file format stores raw and processed data collected from an Electron Spin Resonance (ESR) spectrometer, also known as Electron Paramagnetic Resonance (EPR). These highly specialized scientific instruments, primarily manufactured by Bruker (such as the Bruker EMX) and Active Spectrum Inc., output these files to record the microwave absorption of materials subjected to a strong magnetic field. Scientists and researchers use this data to study chemical species with unpaired electrons.

Because .ESR files are closed, proprietary formats, they present significant disadvantages when sharing data with peers who lack expensive laboratory software. Viewing or analyzing these files outside the laboratory typically requires proprietary software tied to hardware licenses. Standard web browsers and regular spreadsheet applications cannot natively interpret the complex binary or specialized ASCII structures contained within them. Users usually need to convert these files into universal data formats, such as CSV (Comma-Separated Values), TXT, or JDX (JCAMP-DX), to plot the spectral data using tools like Python, MATLAB, or Microsoft Excel. When converting to CSV, you extract the raw numeric XY data (magnetic field vs. intensity), but you will inevitably lose proprietary hardware parameters, calibration settings, and metadata embedded by the spectrometer.

Standard online converters fail to process .ESR files because the format relies on undocumented, instrument-specific data structures. Often, only the original spectrometer software can properly read or export the complete dataset. Our platform can inspect the file and show text or internal content. If our analysis detects a supported underlying or embedded ASCII format, viewing or conversion to a readable format may still be possible.

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

Users also converted TOC, SCORE and PLO files.


FAQ

If you want to convert ESR file to , you can use Bruker EMX Software or similar software from the "Spectral Analysis Data Storage" category. In the File menu, look for Save As… or Export….

To convert files to ESR, try Bruker EMX Software or another comparable tool in the "Spectral Analysis Data Storage" category.



The ESR 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 ESR converter.