How to pad text lines to a fixed width

Purpose and available settings

Text Padding extends shorter lines toward a selected width by adding one chosen character. Because each line is handled separately, the tool suits plain-text tables, aligned labels, console-style displays, and other text where consistent starting or ending positions matter. It does not shorten a line that already reaches the target. You can provide multiline text, choose the width, select the character used for filling, and decide where that character should appear. The standard settings are empty text, width 20, a space, and left alignment. Empty text is handled separately: the output is empty, with no line padding applied.

Steps for formatting the lines

1. Enter the text to format. For several lines, separate the entries with the newline character. The tool processes each resulting line independently and joins the processed lines with newline characters. 2. Set the width you want to approach. A truthy width is converted to an integer, then constrained to a minimum of 1 and a maximum of 200. A falsy width uses 20. Choose a value that can be converted to an integer, because an unconvertible truthy value may prevent the operation from completing. 3. Select the padding character. Leaving the field empty keeps the default space. When you enter a non-empty value, only its first character is used, even if the entry contains several characters. 4. Select the placement. Left alignment adds characters after a short line, right alignment adds them before it, and another alignment value uses centered placement. Centered filling divides the required amount between both sides; when the amount is odd, the left side receives the smaller share. 5. Start the operation and inspect the resulting lines. Each short line receives only the number of selected characters needed to reach the effective width. A line already at least that wide remains unchanged, so the result may contain lines of different lengths.

Reading and checking the result

Check the output one line at a time and compare each short line with the effective width. Added characters at the end indicate left placement, while characters at the beginning indicate right placement. Characters on both sides indicate centered placement, with the wider share on the right when the required total is odd. A long source line is not reduced to the selected width, so preserving its original length is expected rather than a formatting failure. An empty source value also has a distinct outcome: it produces an empty successful result instead of applying width, alignment, or character choices. Before processing copied text, check its line separators. The reviewed handling explicitly covers the newline character, but carriage returns and other line-ending forms have not been established. Width normalization applies to a truthy value that converts successfully; an unconvertible value may stop completion rather than produce formatted text.

Worked example

A developer prepares a plain-text preview where a short label should align on the right without reducing a longer label.

Enter two lines containing cat and longer, set width 6, choose a period, select right alignment, and run the operation.

The result has two lines: the first contains the short input preceded by period characters until width 6, while the second, already longer than width 6, is unchanged.

Limitations

• The result for a truthy width that cannot be converted to an integer is not established and may fail before completion.
• Handling is established for the newline character, not for carriage returns or other line-ending representations.

Common errors

• A truthy width that cannot be converted to an integer may interrupt the operation. Replace it with a convertible numeric value before trying again.

FAQ

Can I format multiple lines together?

For non-empty input, each line is processed separately, so several newline-separated lines can be formatted in one operation. An empty input produces an empty result instead of padded lines.

Can I choose the filling character?

A non-empty character entry is accepted, but the tool selects only its first character. Leaving the entry empty retains a space as the padding character.

Where are added characters placed?

Placement depends on the selected alignment: left puts added characters after the line, right puts them before it, and other values center them. An odd centered amount gives the right side the larger share.