Text Differ – Free Online Text & Code Comparison Tool

Text Differ is a free online tool for comparing two versions of text, documents, code, and other content. It highlights additions, deletions, and edits so you can quickly see exactly what has changed. Built for developers, writers, editors, students, and content teams, Text Differ supports comparison by characters, words, lines, or sentences. You can also ignore whitespace or capitalization when those differences aren't important. It includes 2-way text comparison and 3-way merging, making it useful for reviewing document revisions, proofreading, checking source code, comparing documentation, and resolving changes between multiple versions. No installation or account is required — simply paste your content and compare it directly in your browser.