CSV to Fixed Width Converter
Some legacy systems, government forms, and mainframe interfaces require fixed-width text files where each column occupies a predetermined number of characters. This converter takes CSV data and produces column-aligned plain text output.
About the CSV to fixed-width text format
Each column is padded or truncated to a uniform width based on the longest value in that column. Columns are separated by spaces. The output is monospaced-friendly plain text suitable for mainframe uploads, government filings, or legacy system imports.
Common use cases
- Preparing a fixed-width payroll file for a mainframe upload.
- Creating a column-aligned report for a government regulatory submission.
- Generating fixed-width test data for a legacy system integration.
How to use this tool
- Upload your CSV file or paste the source content into the text box on this page.
- Click the convert button and wait for the browser to parse the input into consistent columns.
- Inspect the output preview — check row counts, column headers, and sample values before downloading.
- Download the result as fixed-width text and continue with your spreadsheet, database, or reporting workflow.
Tips for best results
- Preview the output in a monospaced font to verify column alignment.
- If the target system requires specific column widths, adjust data lengths in the editor first.
Common pitfalls
Values longer than the column width are truncated. Pad short values with spaces on the right. For precise width control, manual formatting may still be needed for strict mainframe specifications.
For more background on data formats and conversion workflows, read our format guides or browse the converter blog for step-by-step walkthroughs linked to each tool.