Text Diff Checker — Compare Two Texts

Compare two texts or code snippets side by side. Highlights changes instantly, offline, no permissions required.

Text Diff Checker is a lightweight, offline tool for comparing two pieces of text or code side by side. It instantly highlights the differences — showing which lines were added, removed, or changed — in a clean, retro-terminal-style interface. Paste two blocks of text, click Compare, and the tool will display a clear diff view using color-coded highlights: Red (-) for deleted or modified lines Green (+) for newly added lines You can swap, clear, or copy results with a single click. Everything happens locally in your browser — no internet connection, no file uploads, and no third-party access. Key features Instantly compare two texts or code snippets. Highlight added and removed lines in real time. Copy or clear results with one click. Simple, fast, privacy-first design. Works fully offline and requires no setup. Privacy & safety No network access, no external API calls. 100% local processing within the popup. No data tracking, storage, or analytics. CSP-compliant and MV3-ready. Perfect for developers, writers, or anyone who frequently reviews text changes and needs a quick, offline diff tool right inside Chrome.