Text Compare

Compare two texts line by line to show added, removed, and identical lines.

Category: Text Tools

When to use?

Use it to see how two versions of a document or config file differ, or to compare before/after text to grasp the changes.

How to use

  • Paste the original text on the left.
  • Paste the text to compare on the right.
  • Added (green), removed (red), and identical lines are color-coded.

Input Explanation

Paste the original text on the left and the changed text on the right.

Calculation Basis

It splits both texts into lines, applies a diff algorithm to track removed, added, and unchanged lines, and highlights them visually.

Usage Examples

  • Check document changes - Paste two versions and check line-level changes.
  • Compare settings - Check how config or list data changed.
  • Review code changes - Paste before/after code to see which lines changed.

Examples

  • Left "A\nB", right "A\nC" → "A" same, "B" removed (red), "C" added (green)
  • Paste a config before/after on each side → only changed lines are color-coded

Cautions

  • Counts can vary by how line-break characters (LF/CRLF) are handled.
  • Results may differ from other tools depending on whitespace and Unicode handling.

Guides

How comparison works

It compares two texts line by line and color-codes added, removed, and changed lines.

Track change history

Useful for version comparison, before/after code review, and config file diffs. For formatting-only differences, format first then compare to see real changes more easily.

FAQ

What is the comparison unit?

It compares by line.

Can I copy the result?

Yes, you can copy the diff text with +, -, and space prefixes.

Does it show character differences within a line?

This is a line-level compare, so a whole line shows as changed. Check character-level differences yourself.

Can I see the count of added/removed/same lines?

Yes. It tallies added, removed, and identical line counts.

Related Tools

  • Character Counter - Count characters with and without spaces, and line count, in real time.
  • Byte Counter - Calculate the byte length of text when stored as UTF-8.
  • Case Converter - Convert text, variable names, and filenames to UPPER, camelCase, snake_case, kebab-case, and more.
  • Whitespace Remover - Remove whitespace in various ways — leading/trailing, duplicate, or per-line.
  • Duplicate Line Remover - Remove duplicate lines from text, keeping only unique lines.
  • Line Sorter - Sort each line of text in ascending/descending order, or shuffle randomly.