NRF Converter

Extract text from Natus or Neat files (NRF)

Select File
Drop or upload your .NRF file

Online File Converter

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How to extract text from your NRF file

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

Convert NRF to another file type

To convert NRF files to another format, you need Natus NeuroWorks or other Data software.

Convert a file to NRF

To convert other file formats to the "Medical Recording" file type, you need software like Natus NeuroWorks or a similar tool.

About NRF files

The .nrf extension refers to two distinct but problematic proprietary formats that users frequently struggle to access.

1. Natus Neurophysiology Recording File (Primary)

Used by Natus Medical hardware (specifically Nicolet Vision and EDX systems), this file stores critical patient neurophysiology data (EEG, EMG, IOM).

The Problem: These files are based on the Microsoft Compound binary format (OLE2), essentially a complex "file system within a file." They are strictly locked to Natus software. You cannot simply double-click them in Windows or open them in Excel.
The Solution: To share or analyze this data, you must use the original Natus NeuroWorks or Nicolet software to export the recording.
For Analysis: Convert to EDF (European Data Format) or ASCII (CSV) for use in MATLAB or EEGLAB.
For Reports: Export the waveforms and summaries to PDF or DOCX for patient records.

2. Neat Document Folder File (Legacy)

Created by the Neat Company's legacy scanning software (NeatWorks / NeatReceipts). These files act as a "digital cabinet," bundling hundreds of scanned receipts and documents into a single archive.

The Problem: Since Neat transitioned to a cloud-subscription model, users with old local .nrf backups often find themselves unable to open years of financial records. The files are not standard folders; they are proprietary database containers.
The Solution: You generally cannot convert these online directly. The most reliable workaround is to reinstall a legacy version of NeatWorks (v4 or v5), restore the backup, and then use the "Export" function to save your documents as standard PDF or JPG images.

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

Users also converted NEF files.

FAQ

If you want to convert NRF file to , you can use Natus NeuroWorks or similar software from the "Neurophysiology Data Storage" category. In the File menu, look for Save As… or Export….

To convert files to NRF, try Natus NeuroWorks or another comparable tool in the "Neurophysiology Data Storage" category.

The NRF 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 NRF converter.