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Convert CSV to Fixed Width or ASCII Table

Render CSV as fixed-width / column-aligned text or a pretty ASCII table.

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Drop your file hereor click to browseSupports CSV, TSV, or TXT files (.csv, .tsv, .txt) (Max 100MB)

Fixed-width format displays CSV data in aligned columns where each field occupies a consistent character width. This is useful for generating readable text reports, ASCII tables for terminal display, or formatted output for legacy systems that expect column-aligned data. This converter transforms CSV rows into three output styles: Plain Fixed Width (space-padded columns), Box Table MySQL Style (ASCII border characters), and Box Table Unicode Style (Unicode box-drawing characters). You can configure the column padding width and select which columns to include in the output. The tool processes CSV data entirely in your browser, reading the input with PapaParse for RFC 4180 compliance and generating the formatted output using custom column-alignment logic. The fixed-width output is useful for displaying data in terminal-based tools, generating reports for mainframe systems, or creating formatted text files for email distribution where HTML is not available.

How to use the Convert CSV to Fixed Width tool

  1. Load your CSV data: Drag and drop your CSV file, choose a file from your file explorer, or paste CSV data directly into the paste area.
  2. Configure output settings: Select the input delimiter, toggle header row, and choose an output format: Plain Fixed Width, Box Table (MySQL Style), or Box Table (Unicode Style).
  3. Set column padding: For plain fixed-width output, choose the number of spaces separating columns (1, 2, or 3 spaces).
  4. Convert data: Click the "Convert Data" button to render CSV as aligned column text or a pretty ASCII table.
  5. Export results: Copy the results to your clipboard or download as a local file.

Frequently asked questions

What are the different output styles available?
Three styles are available: Plain Fixed Width (space-padded columns without borders), Box Table MySQL Style (ASCII pipe and dash borders), and Box Table Unicode Style (Unicode box-drawing characters for cleaner display).
Can I control the column width in the fixed-width output?
Yes. You can set the padding width (number of spaces between columns) and the tool will auto-size columns based on the longest value in each column plus the padding.
Does the tool handle CSV with many columns?
Yes. The tool dynamically calculates column widths based on the actual data, ensuring all columns are properly aligned regardless of how many columns exist.
Is the output suitable for terminal display?
Yes. The ASCII and Unicode box table styles produce output that renders correctly in terminal emulators, command-line tools, and plain-text email messages.
Can I exclude specific columns from the output?
The tool outputs all columns from the CSV input. To exclude columns, first use a CSV editing tool to remove unwanted columns before converting to fixed-width format.

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