Diff Checker

Shows line-based differences between two texts. Toolbar: new tab or popup. Storage: local open-mode preference only.

Diff Checker allows you to quickly and clearly compare two texts line by line. Paste the texts into the left and right editor, then run the comparison: Added lines (+) Deleted rows (-) Rows that remain the same Highlights: Clean line based diff; side by side (Text 1 / Text 2) view in summary area Line numbers in both editors Swap left and right with one click Same/added/deleted numbers in the toolbar after comparison Navigate forward/backward between differences Copy diff summary with one click Height adjustment with separator between editor and summary Full screen for summary (Esc to exit) Light and dark theme Settings: language (Automatic / English / Turkish) and opening in new tab or popup when clicking on the icon Full page usage for widescreen when opened in tab What's New (v1.1.2) Added language support for 50+ Languages. What's New (v1.1.1) Added inline diff support: Text changes on the same line are highlighted with precision. What's New (v1.1.0) Added settings panel for side-by-side summary columns, switching columns, live stats, draggable size setting, fullscreen for summary, dark theme and language, and tab/popup selection. Privacy: All comparisons are done locally, within the browser. Your texts are not sent to external servers.