Staaarter Tools

Line Suffix Remover

Strips a chosen suffix from the end of every line in your text, only removing it from lines that actually end with it, useful for cleaning trailing commas, semicolons, or a shared closing marker. A free online tool from Staaarter, right in your browser.

Runs locallyUpdated 2026-07-23
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Overview

Introduction

Cleaning up a shared trailing marker from every line of a list, a stray comma, a semicolon, a repeated closing tag, is tedious to do one line at a time in a text editor.

It runs entirely client-side, so nothing you paste is ever uploaded to a server.

What Is Line Suffix Remover?

A line-based suffix-removal tool that checks each line of the input independently and strips your chosen suffix from any line that actually ends with it.

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 Line Suffix Remover Works

The tool splits the input on newlines, and for each line checks `line.endsWith(suffix)`; matching lines get `suffix.length` characters sliced off the end, while other lines pass through unchanged, then rejoins with newlines.

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

When To Use Line Suffix Remover

Use it to strip trailing commas from a pasted code array, remove a shared closing tag from every line, or clean up semicolons left over from another format.

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 Suffix Adder, Line Suffix Adder and Whitespace Trimmer.

Features

Advantages

  • Safe by design: only lines that actually end with the suffix are modified, leaving the rest untouched.
  • Handles mixed input where some lines have the suffix and others don't.
  • Removes precisely the suffix's own length from the end, so it never cuts further into the line than intended even when those same characters appear earlier.

Limitations

  • The match is case-sensitive and exact, so a differently-cased suffix won't be detected.
  • Doesn't remove the suffix from the middle of a line, only from the very end.

Examples

Stripping trailing commas from a pasted array

Input

apple,
banana,
cherry

Output

apple
banana
cherry

With suffix ',', the first two lines lose their trailing comma while the last line, which has none, is left unchanged.

Best Practices & Notes

Best Practices

  • If only some lines have the suffix, that's fine; the tool leaves non-matching lines untouched instead of erroring.
  • Include any trailing space in the suffix when lines end in ', ', otherwise the space is left stranded once the comma is removed.
  • Compare the line count before and after; the two should always match, since lines are only shortened and never dropped.

Developer Notes

The implementation is `input.split("\n").map((line) => (suffix.length > 0 && line.endsWith(suffix) ? line.slice(0, line.length - suffix.length) : line)).join("\n")`, checking each line independently rather than operating on the whole string at once.

Line Suffix Remover Use Cases

  • Removing trailing commas from a pasted code array or list
  • Stripping a repeated closing tag or marker from every line
  • Cleaning semicolons left over after converting between formats

Common Mistakes

  • Assuming every line will be modified, when lines that don't end with the suffix are simply left as-is.
  • Specifying a suffix whose trailing whitespace differs from the text's, so the endsWith check fails and nothing at all is removed.

Tips

  • Use Line Suffix Adder first to preview what a suffix would look like before removing it elsewhere.
  • Because only one occurrence comes off per pass, running it twice cleanly strips a doubled suffix without needing a different tool.

References

Frequently Asked Questions