Convert JSON to Fixed-Width Text as a Scheduled Task

Withdata DataFileConverter converts JSON files to Fixed-Width Text locally — single file, batch, or merge multiple JSON files into one Fixed-Width Text. Object arrays, plain arrays and JSON Lines are all supported. 100% local, secure, and cross-platform.

JSON is a widely used structured data format.

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Why Choose Withdata JSON to Fixed-Width Text Converter?

🔒 100% Local & Secure

JSON files are read and converted on your own computer. Nothing is uploaded to any cloud server.

⚡ Fast Streaming Conversion

Large JSON files are processed in streaming mode with low memory usage — millions of rows within a minute.

📁 Batch & Merge

Batch convert many JSON files to Fixed-Width Text files, or merge multiple JSON files into one Fixed-Width Text.

🔄 Column Widths, No Delimiter

Define the width of every column (N columns need N-1 widths). No delimiter and no quoting are needed.

🖥 Windows, macOS, Linux

Native builds for Windows, macOS and Linux, with a step-by-step GUI wizard and a command line interface.

⏱ CLI & Scheduled Tasks

Save a conversion session and run it automatically from Windows Task Scheduler or crontab.

Full Feature Comparison

FeatureSupported details
Input sourceLocal JSON, batch JSON, merged JSON, URL / cloud JSON
Output formatFixed-width text with detected or custom column widths
Conversion modeSingle file · merge many JSON files into one Fixed-Width Text · batch (one to one)
Running modeGUI wizard · command line · scheduled tasks
Source optionsObject array / JSON Lines mode, nested flattening, encoding
Output optionsColumn mapping, encoding, date format, empty value handling
PlatformWindows, macOS, Linux (native, 64-bit)

All JSON to Fixed-Width Text Conversions You Need

JSON to Fixed-Width Text Notes

How to Convert JSON to Fixed-Width Text (4 Steps)

  1. Open Withdata DataFileConverter and select JSON as the input type and Fixed-Width Text as the output type.
  2. Load your JSON data — a single file, a folder / list of files for batch conversion, or several files to merge into one.
  3. Check the preview table, then adjust the source options and the output options.
  4. Click Convert — the Fixed-Width Text output is written in seconds. Save the session if you want to run it again from the command line.

Convert JSON to Fixed-Width Text in GUI

In GUI mode the conversion is a step-by-step wizard: choose the JSON source, choose the Fixed-Width Text destination, check the preview, and click Convert. See Withdata DataFileConverter.

Set scheduled tasks for converting JSON to Fixed-Width Text

After converting JSON to Fixed-Width Text in the command line, you can schedule and automate the "JSON to Fixed-Width Text" conversion:

  1. Save the session and create a .bat (Windows) or .sh (Linux/macOS) file for the "JSON to Fixed-Width Text" conversion.
  2. Set a scheduled task: on Linux/macOS use crontab; on Windows use the Task Scheduler.

FAQ

How fast is the JSON to Fixed-Width Text conversion?

Is my data safe during the conversion?

Does it work on Linux and macOS?

Can I convert JSON files in batch?

Can I merge multiple JSON files into one Fixed-Width Text?

Can I automate the conversion from the command line?

Does it support JSON Lines (JSONL)?

Can it read deeply nested JSON?

Start Converting JSON to Fixed-Width Text Today

Download Withdata DataFileConverter for a free trial. Runs on Windows, macOS and Linux.

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