Text Diff Checker Online
Compare text or text files line by line. See additions and removals in side-by-side or unified view, ignore case or spaces, and download a diff report.
Written by Anil Gautam · Updated
Read a line-by-line text comparison
Green lines were added to the changed text; red lines were removed from the original. A replaced line appears as a removal and an addition. Unchanged lines provide context. Split view keeps the original and changed text in separate columns, while unified view puts changes in one sequence.
For an original containing Apple then Banana and a revision containing Apple then Cherry, Apple is unchanged, Banana is removed and Cherry is added. The report uses + for additions, - for removals and a space for unchanged lines.
Choose the right comparison for your data
Use this tool for plain text, Markdown, source code, logs and configuration snippets. Matching can ignore case, leading and trailing spaces or repeated spaces. It detects line changes; it does not provide word-level or character-level highlighting, document formatting comparison, automatic merge or shareable saved diffs.
Files are read locally and limited to 5 MB. To keep the browser responsive, comparison is limited to two million line-pair cells and 10,000 total lines. For very large files compare smaller sections. Use Compare Lists for unordered entries, or the JSON toolkit's Diff view when object structure matters.