The Text Diff Checker compares two versions of text line by line and highlights additions, deletions, and unchanged lines. It's useful for comparing code edits, document versions, configuration files, and more.
A text diff tool compares two pieces of text and highlights what has changed between them. Added text is shown in green, removed text in red, and unchanged text in grey. It is widely used by developers to compare code changes, writers to track document edits, and anyone spotting differences between two versions of text.
Most diff algorithms use the Longest Common Subsequence (LCS) algorithm. It finds the longest sequence of characters or words that appear in both texts in the same order, then marks everything else as either added or removed. The unified diff format adds context lines around changes for readability.
Yes. The text diff tool works perfectly for comparing code files. Paste your old code in the left panel and new code in the right, and it highlights every changed line. For quick comparisons between two code snippets, this tool works great.
Character diff compares text letter by letter. Word diff compares word by word. Line diff (most common for code) compares line by line. This tool highlights differences at the character level within changed lines, giving the most precise view of what changed.
Not directly. You will need to extract the text first by copying and pasting from your PDF or Word document. For Word documents, the built-in Track Changes and Compare Documents feature in the Review tab provides a more integrated experience with formatting preserved.