Withdata DataFileConverter converts plain text files to Fixed-Width Text locally — single file, batch, or merge multiple TXT files into one Fixed-Width Text. Delimited or fixed-width — both are supported. 100% local, secure, and cross-platform.

Plain text files can be unstructured, delimited, or fixed-width.

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Why Choose Withdata TXT to Fixed-Width Text Converter?

🔒 100% Local & Secure

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

⚡ Fast Streaming Conversion

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

📁 Batch & Merge

Batch convert many TXT files to Fixed-Width Text files, or merge multiple TXT 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

Feature	Supported details
Input source	Local text files, batch text files, merged text files
Output format	Fixed-width text with detected or custom column widths
Conversion mode	Single file · merge many TXT files into one Fixed-Width Text · batch (one to one)
Running mode	GUI wizard · command line · scheduled tasks
Source options	Delimiter or column widths, quote character, header row, start row, encoding
Output options	Column mapping, encoding, date format, empty value handling
Platform	Windows, macOS, Linux (native, 64-bit)

All TXT to Fixed-Width Text Conversions You Need

Single TXT file → Fixed-Width Text file, step by step in the GUI wizard
Batch convert multiple TXT files → multiple Fixed-Width Text files
Merge multiple TXT files into one Fixed-Width Text — merge tool
Convert TXT to Fixed-Width Text in the command line, and run it as a scheduled task
All TXT conversion tools and all Fixed-Width Text conversion tools

TXT to Fixed-Width Text Notes

Text can be parsed as delimited (by a delimiter character) or as fixed-width (by column widths).
Line breaks, quoting and the encoding can be configured.
A header row is optional; leading rows can be skipped.
Output column widths are detected from the data (measured width + 15% slack, at least 2 and at most 15 extra characters), or set manually.

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

Open Withdata DataFileConverter and select TXT as the input type and Fixed-Width Text as the output type.
Load your TXT data — a single file, a folder / list of files for batch conversion, or several files to merge into one.
Check the preview table, then adjust the source options and the output options.
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.