Diff Viewer compares snippets, configs, copy, JSON, or plain text side by side. Use it to spot edits before committing changes or sending updated content.
Yes. The tool is free and runs directly in your browser with no account required.
No. Processing happens locally in the browser tab. Neither text block is sent to a server.
Line-by-line and inline word/character differences are highlighted, showing additions, deletions, and changes between the two text blocks.
Yes — the diff is text-based, so it works for JSON, source code, config files, CSV rows, or any plain text. For JSON specifically, formatting differences (like whitespace) will also show as diffs.
Yes — by convention the left side is treated as the 'original' and the right as the 'modified' version, so additions and deletions are labeled relative to that direction.
The tool works well for typical text snippets, configs, and documents. Extremely large files (thousands of lines) may render slowly depending on your browser and device.
Yes, the diff is character-sensitive by default, so whitespace and formatting differences will appear as changes even if the visible text looks identical.
