Quick Marketing Tools

Text Diff Checker

Compare original and modified text line by line, review added/removed/changed counts, and copy a compact diff.

About Text Diff Checker

Compare two texts side by side and highlight additions, deletions, and changes with color-coded diff output.

The Text Diff Checker compares two pasted text versions in a private client-side workspace. It splits both inputs by line, marks lines as unchanged, added, removed, or changed, and provides side-by-side and inline views. For changed lines, it also highlights word-level differences using a longest-common-subsequence style comparison so editors can see small wording changes inside a line. It is useful for content revisions, metadata rewrites, documentation updates, code snippets, contract notes, campaign copy tests, and QA checks where exact wording matters.

How to use Text Diff Checker

Paste the original text into Text A and the revised text into Text B. Review the added, removed, and changed counts, then switch between side-by-side and inline views depending on how you prefer to read changes. Use the copy action to export a compact diff with plus and minus markers when you need a quick change summary for a ticket, email, or editorial note.

Text Diff Checker example

An SEO editor can paste an old meta description in Text A and a rewritten version in Text B. The checker shows whether a line was replaced, highlights words that changed inside the line, and produces a copied summary showing the removed line with '-' and the added line with '+'. The same workflow works for title tags, ad copy, short policy text, release notes, or code snippets where one missing word can change meaning.

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Helpful questions

How does the diff compare text?

It compares inputs line by line, marks added, removed, changed, and unchanged lines, and highlights word-level differences inside changed lines.

Can I switch the view?

Yes. Use side-by-side mode to compare versions in parallel, or inline mode to read additions and removals in one flow.

Does it compare formatting?

No. It compares plain text. Rich formatting, comments, tracked changes, and document metadata are not analyzed.

Can I copy the diff?

Yes. The copied diff uses simple markers, with '+' for added lines and '-' for removed lines.