Extract text from FNM files
To convert your FNM file to another format, you need Desktop Underwriter or other Data software.
To convert other file formats to the "Financial Data & Search Index" file type, you need software like Desktop Underwriter or a similar tool.
The .fnm extension represents two distinct data formats that often cause confusion due to their incompatibility with standard office software.
1. Fannie Mae 3.2 Data File (Primary Use):
Most commonly, this is a flat text file containing mortgage application data, formatted to the legacy 'Fannie Mae 3.2' standard. These files are the backbone of the mortgage industry, transferring data between Loan Origination Systems (LOS) and underwriting platforms like Desktop Underwriter.
The Problem: While technically text-based, the files are structurally rigid sequences of codes and truncated strings (e.g., R01, R02 record headers) that are indecipherable to the human eye. Opening them in Notepad reveals a mess of unlabelled data, and they cannot be natively opened in browsers or Microsoft Word. Users typically possess these files to archive loan history or migrate data but lack the expensive origination software (like Encompass or Calyx) required to visualize them.
The Solution:
2. Apache Lucene Field Info File:
Less frequently, this file is a 'Field Name Map' generated by Apache Lucene, a widely used search library.
The Problem: This is a binary system file that stores metadata about fields (e.g., author, title, body) within a search index segment. It is often encoded in UTF-16 (BE) and is strictly tied to specific versions of the Lucene core. It is not meant to be opened manually.
The Solution:
Convert.Guru analyzes your FNM file, detects the exact format, and lets you read the text inside.
Users also converted FNMM, PPSX, PPTX and PPTM files.
If you want to convert FNM file to CSV, JSON, XML, YAML, YML, TOML, INI, CFG, CONF, DAT, DB or SQL, you can use Desktop Underwriter or similar software from the "Mortgage Loan Data Import" category. In the File menu, look for Save As… or Export….
To convert DBF, XML, SQLITE, XLSX, SQL, TSV, ACCDB, YAML, MDB, CSV, ODS or JSON files to FNM, try Desktop Underwriter or another comparable tool in the "Mortgage Loan Data Import" 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 FNM converter.