Command-Line EDI Converter Documentation

The tool converts 837 and 835 transactions into JSON or comma-separated values (CSV) format.

The output is easy to understand and requires no EDI knowledge.

You can see examples of the CSV output here

To see examples of JSON output, navigate to any claim or payment examples and click on “JSON” button.

For JSON conversions, the converter supports JSON Lines format with line-separated JSON objects. This provided an alternative to well-formed JSON with enclosing arrays, which are inefficient with large files.

This option is recommended for converting EDI files with many transactions and streaming.

The conversion is performed locally on your machine; your data never leaves your network.

The converter’s only dependency is Java. It supports any Windows, Linux, or macOS OS that can run Java 17 or higher.

Installation Instructions

  • Download and install Java. You can also install OpenJDK using a package manager on Linux or macOS. Java 17 or higher is required.
  • Download the converter (as a zip file) from this link
  • Unzip the converter’s zip file
  • It is recommended to add the “bin” directory of the distribution to the path, e.g., export PATH=$PATH:ediconvert-2.5.1/bin or set PATH=%PATH%;ediconvert-2.5.1\bin. On Linux or macOS you can also create a symlink, e.g., ln -s ediconvert-2.5.1/bin/ediconvert .

You need a license key to run the converter. Request your trial license key by submitting this form:

Your license file is named ediconvert-license.bin. Save this file anywhere and define the environment variable EDI_LICENSE with the path to the license file.

For example:

export EDI_LICENSE=edi-license.bin
set EDI_LICENSE=edi-license.bin

Run ediconvert -V to view the license information.

Running the Converter

To run the converter, simply provide a path to the EDI file and the output directory. The output directory must exist. Otherwise, the converter assumes that the value of the -o option is the file name:

mkdir json
./ediconvert edi/837/my_edi_file.edi -o json

You can also supply patterns to convert multiple files in one go:

./ediconvert edi/837 -p "*.edi" -o json

If you provide a directory for the output, the converter will convert each file from the input into this directory. If the output is a file, the converter converts all EDI files into one.

CSV mode always converts multiple files into a single output:

./ediconvert edi/835/ -p "*" -o csv/combined-835 -m csv

CSV Conversion

By default, the converter creates two output files, one for header-level data (claim or payment) and one for line-level data.

The internally generated ID, the patient control number, and the payer control number fields are repeated for each line:

Line Columns

You can produce a single file using the --single-csv option. In this case, the converter will duplicate the header-level data for every line:

Line Columns

Converting to Standard Out

You can run the converter in the JSON Lines or in the CSV mode and pipe its output to another process, e.g.:

./ediconvert edi/837/my_edi_file.edi -m jsonl | grep '"zipCode":"37232"'

Note that the “regular” JSON conversion happens entirely in memory since the resulting output must be a well-formed JSON array. This may not work for large files containing many transactions.

CLI Options

Usage: ediconvert [-hrV] [--format-json] [--single-csv]
                  [--chunk-size=<chunkSize>] [-m=<outputFormat>] [-o=<outFile>]
                  [-p=<filePatterns>] <ediFileOrDir>
Converts X12 EDI files to JSON or CSV
      <ediFileOrDir>    EDI file or a directory containing EDI files
  -p, --patterns=<filePatterns>
                        File patterns to match in the directory, e.g., '*.edi'.
                          Required if ediFileOrDir is a directory
  -r, --recurse         Recursively search for matching files in all
  -o, --out=<outFile>   Output file or directory. Defaults to the name of the
                          EDI file + the extension depending on the output
                          format;'.json', '.jsonl' or '.csv'. If omitted, the
                          converted will write to standard out, which can be
                          used for piping/streaming the output.
  -m, --mode=<outputFormat>
                        Output format. Acceptable values: JSON, JSONL, CSV.
                          Defaults to JSON
      --format-json     Format JSON with indentation and new lines. Ignored for
                          CSV and JSONL.
      --single-csv      Convert into a single CSV file with header data
                          repeated for each line. By default, service
                          line-level fields are saved into a separate file.
                          Ignored for non-CSV modes
                        How many transactions to parse and convert at once.
                          This option determines the memory footprint and can
                          be used for fine-tuning. Ignored for JSON mode.
                          Defaults to 100
  -h, --help            Show this help message and exit.
  -V, --version         Print version information and exit.


The converter creates logs with information and diagnostic messages in the “logs” directory. These logs are useful when routing the output to standard out.

The default location of the logs folder is the directory where the converter is executed. It can be changed by defining the ediconvert_logs_dir environment variable, e.g.,

export ediconvert_logs_dir=ediconverter_logs