Text Diff Checker

Compare two blocks of text and highlight added, removed and changed lines side by side.

Text Diff Checker compares two blocks of text side by side and visually highlights every difference between them — added lines, removed lines, and changed sections — using the same approach Git uses for code diffs. Drop in two versions of any document and the tool produces an instantly readable report of exactly what changed, where, and by how much. Writers use it to compare drafts before and after edits, especially when working with collaborators who do not return tracked-changes documents. Lawyers and contract reviewers use it to spot small but consequential edits between contract revisions. Developers use it to compare config files, log outputs, and API responses across runs. Because the comparison happens entirely in your browser, the text you paste — even if it includes confidential drafts, internal documents, or unreleased copy — never leaves your device.

How Text Diff Checker works

Text Diff Checker is a free browser-based utility from Salah Tools Hub. It is designed to give you an immediate result without an account, subscription, or upload to a remote server.

Enter your information into the tool after the page loads, review the result, and use the available copy or download controls. Your input stays on your device while the tool is running.