Diff Tool

A text diff tool compares two plain-text documents and highlights every line and word-level difference — additions in green, removals in red. It works on any text: prose, code, configuration files, log output, or any string content.

A line diff highlights entire lines that changed — standard git diff output. A word diff highlights changed words or tokens within a line, ignoring unchanged words. A character diff highlights individual characters — useful for spotting single-letter differences, typos, or subtle Unicode substitutions. Word diff is best for prose; line diff for code.

Paste both documents and switch to word or character diff mode. Identical passages show as unchanged (no highlighting). Changed or paraphrased sections are highlighted. For formal plagiarism detection across a large corpus, dedicated tools (Turnitin, Copyscape) are more appropriate, but this works for side-by-side comparison of two specific documents.

Yes. Paste both files and use line diff mode — each CSV row appears as a line. Changed fields are highlighted inline in word diff mode. For large CSV files where you need to compare by column or key, convert to JSON first using the CSV to JSON tool and then use the JSON Diff tool for structured comparison.

No. All comparison runs in your browser. Text is never transmitted to any server. This is safe for confidential documents, draft articles, legal text, and any sensitive written content.