compare two texts side by side with line-by-line diff highlighting. see additions, removals, and unchanged lines instantly.
Diff Checker compares two blocks of text side by side and highlights every difference. See additions, deletions, and unchanged lines at a glance — like a lightweight version of git diff in your browser.
Paste the original text on the left and the modified text on the right. The tool highlights added lines in green, removed lines in red, and unchanged lines in the default color. Line numbers help you find exactly where changes occurred.
The comparison runs entirely in your browser. Your text is never sent to any server, making this safe for comparing code, contracts, configurations, or any sensitive documents.
Paste original text
Paste the original or "before" text into the left panel.
Paste modified text
Paste the updated or "after" text into the right panel.
View the diff
Differences are highlighted immediately: green for additions, red for removals, gray for unchanged lines.
Navigate changes
Scroll through the side-by-side view to review each change with line numbers.
Code review
Compare two versions of a function or file to see exactly what changed.
Contract review
Compare original and revised contract text to spot every change.
Configuration diffs
Compare config files across environments to find discrepancies.
Content editing
Compare draft and final versions of articles, emails, or documents.
Database records
Compare JSON or text representations of database records to find differences.
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