A changed sentence can be easy to miss in a copied notice or configuration file. A line comparison shows which lines were added or removed, without requiring you to scan both versions repeatedly.
Line by Line Text Diff takes a before version and an after version. Its result distinguishes the changes visually and provides a report you can download.
Make the comparison manageable
Put Lahore on one line and Karachi on the next in the first box. In the second box, keep Lahore but replace Karachi with Islamabad. The first line is retained; the Karachi line is removed and an Islamabad line is added.
That is a line change, not a claim that the word Karachi was replaced in every possible context. The comparison does not understand the meaning of the cities or track edits inside a sentence as a word processor might.
Choose whether edge whitespace should matter. Ignoring spaces at the beginning or end can help review copied prose. For a format where indentation carries meaning, use an exact comparison.
Break lines deliberately
A paragraph pasted as one long line is treated as one unit. Changing one word in it can cause the whole line to appear as removed and added. Divide the text into meaningful lines when you want a more useful review.
Each side is limited to 200 lines. Large logs should be narrowed to the relevant interval before comparison. The tool is intended for a readable review, not an unlimited source repository history.
Keep confidential documents out of a shared review session. The text is processed by the WordPress server, even though the output appears in a browser editor.
Use the result to locate differences, then read the surrounding text before accepting an edit. A line comparison can show what changed, but it cannot decide whether a date, instruction or configuration value is correct.