Text Diff / Compare: guide & how to use

Paste an original and a revised version to see added, removed, and unchanged lines. Runs entirely in your browser. This guide is part of our guides library in the Text & writing category—Word counts, case styles, lorem ipsum, citations, similarity highlights, and diffs for drafts and homework.

What this tool does

Text Diff / Compare — Compare two texts line by line with highlights. It fits alongside other utilities on AI Tool Hub so you can solve small problems quickly without installing desktop software.

When it helps

Reach for this tool when your work overlaps with topics like: diff, compare, changes, revision. Teams use these utilities for ad hoc checks during development, studying, content drafting, and light business calculations—always double-check critical numbers against your own policies or professionals when stakes are high.

How to use it

1. Open the tool using the button below.
2. Enter or paste your input in the workspace.
3. Review the output and copy or export it for your project.

Common questions

How is the diff computed?

We use a longest-common-subsequence style line comparison, with simple character highlighting inside changed lines.

Related tools

Pair this workflow with other utilities on the site:

• Plagiarism Highlighter

  Find overlapping phrases between two texts.
• Case Converter

  Transform text between camelCase, snake_case, and more.
• Text to LaTeX

  Escape plain text for safe LaTeX or wrap it in verbatim—locally in your browser.

Privacy

Like most utilities in this category, Text Diff / Compare runs locally in your browser after the page loads—your content is not sent to our servers for processing.