Text Diff & Compare

What it does

A text diff finds the differences between two pieces of text. This tool supports three granularities: line (split on newlines, great for code and prose), character (per-character, for small edits) and word (split on words, great for natural language). The view can be side-by-side (original on the left, changes on the right) or unified (stacked with -/+ markers). Every comparison reports the added, removed and unchanged counts.

Example

Paste the original on the left and the changed version on the right:

function add(a, b) {
  return a + b;
}

function add(a, b) {
  // sum
  return a + b;
}

Pick "Line + Side-by-side" and the new comment line is highlighted in green while the rest stays unchanged.

Use cases

• Spot exactly which lines a colleague changed during code review
• Compare two versions of a config, log or translation
• Review copy edits across document revisions

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