Text Differ

Text Differ is a free online utility that compares two pieces of text and highlights additions, deletions, and edits. Users paste the original text on the left and the modified version on the right, then choose a comparison mode—character, word, line, or sentence—to see changes visualized. The tool is aimed at anyone who works with revised content: developers reviewing source code or configuration files, writers and editors checking document revisions, documentation teams updating manuals, students comparing drafts, and content teams tracking article edits. It supports options to ignore whitespace or case, and offers a three‑way merge for combining changes from multiple contributors. Key features include instant diff detection, colored highlighting of changes, copy/export of results, and a revert option to restore original content. The interface works directly in the browser without requiring an account or installation, making it a quick, accessible solution for document, code, or configuration comparison.