Text Diff Checker Online
Compare two versions of any text and instantly see what changed — words added, removed, or moved. Runs in your browser; your text is not uploaded.
How It Works
ClearDiff uses a Longest Common Subsequence (LCS) algorithm — the same technique used by version control systems like Git — to find the minimal set of differences between two texts. It tokenizes both inputs word by word, builds a comparison table, and highlights every insertion and deletion inline.
Word-Level Comparison
Unlike simple line-by-line diff tools, ClearDiff compares at the word level. This means even small edits within a paragraph — a changed word, a reordered phrase — are detected and shown precisely. Additions appear in green, deletions in red with strikethrough.
Who Is This For?
ClearDiff is useful for writers comparing drafts, editors reviewing revisions, developers checking config files, students comparing versions of an essay, or anyone who needs to see exactly what changed between two blocks of text.
Your text never leaves your browser. No server receives your input. Your text is not uploaded or stored; only a theme preference is kept in your browser, and the site counts visits with anonymous statistics.
Does it support large texts?
Yes. For texts under about 50,000 characters combined, ClearDiff uses word-level comparison for precision. Larger inputs, or texts with a very large number of changes, are compared line by line, and the result says so. Both modes run entirely in your browser; texts that are too different or too large to compare there get a message instead of a result.
What are the green and red highlights?
Green highlights indicate text that appears in the Modified version but not in the Original — these are additions. Red highlights with strikethrough indicate text present in the Original but removed in the Modified version. Unchanged text appears without any highlight.
Is this tool free?
Yes, completely free with no account required and no file size limits. Open the tool and start comparing immediately.
For questions or inquiries contact us at info@cleartexteditor.com