How is this different from Left-pad a String?

The underlying operation is the same (space-padding on the left), but this tool works line by line over multi-line input and always uses spaces, framed specifically around visual alignment rather than arbitrary character padding.

What if a line is already longer than the column width?

It's left unchanged; the tool never truncates a line that already exceeds the target width.

Does it strip existing leading spaces first?

No. Any indentation already present counts toward that line's length, so a previously indented line ends up further right than one that was not. Trim the lines first when you want alignment based purely on their content.

String Right Aligner Online - Align Lines in a Fixed Column

Overview

Introduction

Plain-text tables and reports often need a numeric or short-text column right-aligned for readability.

This tool applies that alignment to every line of your input at once.

What Is String Right Aligner?

A line-by-line right-aligner that space-pads each line on the left to a fixed column width, so shorter lines line up flush-right against longer ones.

It runs entirely client-side as part of this site's String Tools collection, so nothing you paste is ever uploaded to a server.

How String Right Aligner Works

Input is split into lines, and each line is individually padded on the left with spaces to the target width using padStart().

The transformation happens synchronously in JavaScript the moment you type, with no network round trip involved.

When To Use String Right Aligner

Use it when formatting a plain-text table's numeric column, or aligning a list of short codes for a monospace display.

It's a fast way to get the answer without opening a code editor, a REPL, or writing a one-off script just to check.

Often used alongside String Left Padder and String Center Aligner.

Features

Advantages

Processes every line at once instead of padding each individually.
Uses spaces specifically, matching typical visual-alignment expectations.
Pads each line independently, so a column still aligns correctly even when the lines differ widely in length.

Limitations

Only pads with spaces; use Left-pad a String if you need a different pad character.
Assumes a monospace font for the alignment to actually look aligned.

Examples

Aligning a short numeric column

Input

1
22
333

Output

       1
      22
     333

Each line is right-aligned within an 8-character column.

Best Practices & Notes

Best Practices

View the result in a monospace font; proportional fonts won't show true visual alignment.
Trim leading whitespace before aligning, since existing indentation counts toward the width and pushes that line out of the column.
Choose a width at least as wide as your longest line, because anything longer is returned unpadded and breaks the alignment.

Developer Notes

Each line is padded independently via padStart(width, " "), rather than padding the whole multi-line string as one unit, which would incorrectly measure length across newlines.

String Right Aligner Use Cases

Right-aligning a numeric column in a plain-text report
Aligning short codes for a monospace terminal display
Formatting output for a fixed-width log format

Common Mistakes

Viewing the output in a proportional font, where alignment won't visually line up.
Aligning text containing multi-byte characters and expecting perfect columns, since padStart counts UTF-16 units rather than display width.

Tips

Use Left-pad a String instead if you need a non-space pad character.
Right alignment is the conventional choice for numeric columns, where lining up the place values makes the numbers easy to compare at a glance.

String Right Aligner