Compare two texts side by side and see the differences highlighted. Line-by-line and character-level comparison. All processing happens locally in your browser.
Saved Presets is a Supporter feature.
Tool History is a Supporter feature.
Tool Notes is a Supporter feature.
Paste or type the original text in the left input field labeled 'Text A'. This is typically the older or original version.
Paste or type the modified text in the right input field labeled 'Text B'. This is typically the newer or changed version.
The tool automatically compares the texts and shows the differences below. Switch between side-by-side and inline views using the toggle button.
Use the 'Copy Diff' button to copy the results, or review the statistics showing additions, deletions, and unchanged characters.
Our diff checker uses the diff-match-patch algorithm developed by Google. All processing happens locally in your browser, ensuring complete privacy and enabling offline functionality.
The tool performs character-level comparison to find the minimum set of changes needed to transform one text into the other. It then cleans up the result to produce human-readable diffs.
The tool offers two visualization modes: side-by-side view for parallel comparison, and inline view for a unified stream of changes. Both modes use color coding for additions and deletions.
The tool calculates and displays the number of characters added, removed, and unchanged. This gives you a quick overview of how different the two texts are.
The tool compares text character by character, so it may not understand semantic differences. Very large texts may cause performance issues depending on your device.
Yes, our diff checker is completely free with no registration required. You can compare unlimited texts directly in your browser without any costs or subscriptions.
