Text Diff Checker
Compare two texts side by side with difference highlighting
About the Text Diff Checker
This text diff checker compares two blocks of text line by line, highlighting added lines in green and removed lines in red. It's a quick way to spot changes between two versions of a document, configuration file, or piece of code without setting up a full diff tool.
Common uses include comparing contract revisions, checking what changed in a copied-and-edited document, verifying that a translation matches the original structure, or auditing changes to configuration or data files. Paste both versions and differences are shown immediately.
Frequently asked questions
Does it compare line-by-line or character-by-character?
Line-by-line. Each input is split on newlines, and the diff highlights which lines were added, removed, or unchanged. It doesn't show within-line character differences — for that, paste single lines.
Will it spot reordered content?
Reordering shows up as a remove-then-add for the moved block. There's no special 'moved' marker — line diffs treat each line independently regardless of where else it appears.