Withdata DataFileConverter converts TSV files to Fixed-Width Text locally — single file, batch, or merge multiple TSV files into one Fixed-Width Text. 100% local, secure, and cross-platform.

TSV (tab-separated values) is a tab-delimited tabular text format.

Download Free Trial

Why Choose Withdata TSV to Fixed-Width Text Converter?

🔒 100% Local & Secure

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

⚡ Fast Streaming Conversion

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

📁 Batch & Merge

Batch convert many TSV files to Fixed-Width Text files, or merge multiple TSV 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 TSV, batch TSV, merged TSV
Output format	Fixed-width text with detected or custom column widths
Conversion mode	Single file · merge many TSV files into one Fixed-Width Text · batch (one to one)
Running mode	GUI wizard · command line · scheduled tasks
Source options	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 TSV to Fixed-Width Text Conversions You Need

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

TSV to Fixed-Width Text Notes

Columns are separated by tab characters; the first row can be used as the header (optional).
Quoted fields and embedded line breaks are parsed correctly.
The encoding is detected automatically and can be overridden.
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 TSV to Fixed-Width Text (4 Steps)

Open Withdata DataFileConverter and select TSV as the input type and Fixed-Width Text as the output type.
Load your TSV 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.

Convert TSV to Fixed-Width Text in GUI

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