Text Diff Checker Guide
A text diff checker compares two blocks of text and highlights exactly what was added, removed, or changed between them. Editors use it to review manuscript revisions, developers to compare code snippets without a git checkout, and translators to verify that no content was lost during translation. The tool renders differences inline with color coding, so you can scan a long document and instantly see where edits landed. It catches subtle changes that are easy to miss when eyeballing two versions side by side. The checker runs a longest-common-subsequence algorithm over the two inputs, splitting them into words or characters before computing the minimal edit script. Additions are highlighted in green, deletions in red, and modifications often shown as a paired deletion-addition block. You can toggle between inline diff, which marks changes within the original flow, and side-by-side diff, which places the two versions in parallel columns. Whitespace-sensitive and case-sensitive modes let you control what counts as a real difference.