Text Aligner (Centre, Right, Justify, Pad)

Line up plain text the way a word processor would, but with spaces, so it stays aligned anywhere a monospace font is used: code comments, README files, terminal output, receipts and chat code blocks. Centre or right-align each line to a width, justify paragraphs so both edges are straight, or pad lines to a fixed length with any character, such as zeros in front of numbers (0042) or dots after a label. Hangul, CJK and emoji are counted as two columns.

How to use this tool

1. Paste the lines.
2. Choose the alignment: left, centre, right, justify, or pad on the left or right.
3. Set the width in columns (0 uses the longest line) and the padding character.
4. Copy the aligned text into a monospace context.

Formula

Padding = width − line width · centre: ⌊padding ÷ 2⌋ on the left, the rest on the right · justify: spaces between words = (width − letters) ÷ gaps

Widths are monospace columns using Unicode East Asian Width, so 가 or 漢 counts two and an accent counts zero. With a space as the padding character, centred and left-aligned lines get no trailing spaces; with any other character both sides are filled. Justify spreads the leftover space over the gaps between words, giving the extra spaces to the leftmost gaps, and leaves the last line of each paragraph left-aligned, as typesetting does. Lines longer than the width are not cut.

Example

Centred in 20 columns, the sample becomes: “Menu” with 8 spaces in front, “Coffee 3.50” (11 columns) with 4, “Tea 2.80” with 6 and “Croissant 4.20” (14) with 3. Padding “42” on the left with zeros to 5 columns gives 00042.