How to use the Text Diff Checker
Paste your original text in the left box and the modified text in the right box. Differences are highlighted instantly — green for added text and red for removed text. Use the line-by-line view for a detailed comparison.
Frequently Asked Questions
A diff (difference) shows exactly what has changed between two versions of a text. Added content is highlighted in green and removed content in red, making it easy to see every change at a glance.
Common uses include comparing contract versions before signing, reviewing document changes, comparing code versions, checking what changed in a terms and conditions update, and proofreading edited text.
FoxToolkit text diff compares line by line and highlights changed lines. Within changed lines it also highlights the specific words or characters that differ, giving you both overview and detail.
Yes, there is no size limit. Paste full documents, articles or code files — the comparison runs entirely in your browser with no data sent to our servers.