Compare two code snippets locally. See added and removed lines, original and revised line numbers, whitespace changes and a downloadable comparison report. Your code is never uploaded or executed.
Line numbers show original / revised. ↵ marks a line break. Unchanged items show revised text when case is ignored. Reports include your code. Comparison checks text, not syntax or runtime behavior.
Your code stays on your device and is treated as plain text. No uploads, accounts, saved input history or execution are involved. A shared, bounded comparison engine also powers Text Diff Checker, keeping behavior consistent across both tools.
No. This is a text comparison of source code, not an AST, syntax, semantic or runtime comparison. It works with text from JavaScript, HTML, CSS, JSON and other languages without parsing or executing them. Moving a block can appear as removal and addition. There is no syntax highlighting or merge operation.
Spacing, indentation, tabs and the final line break participate in comparison. CRLF and CR normalize to LF before comparison, so line-ending convention changes alone are not differences. Line mode shows original/revised line numbers, a return marker for lines ending in LF and an explicit marker for a final line without a break. Tabs display at four-column stops but remain tab characters in the report.
Usually keep this off for code because case changes can be meaningful. If enabled, the tool compares lowercase text and distinguishes a case-insensitive match from identical input. Unchanged segments display the revised spelling. This option does not establish equivalent program behavior.
It compares Unicode word segments including punctuation and whitespace, not programming-language tokens. Segmentation uses Intl.Segmenter when available, with an explicit fallback. Use line mode for longer code snippets; dense code can reach the word-segment limit quickly.
Each side accepts up to 100,000 UTF-16 units and 2,000 comparison segments. Inputs are never truncated. Word mode counts punctuation and whitespace segments as well as words. The longest-common-subsequence comparison is bounded to keep memory and work manageable. Editing an input or option clears old results and exports.
No. It is a readable TXT comparison report containing your code with JSON-escaped tabs and line breaks. It cannot be applied by git apply or patch. Review it before sharing because it contains source text. Copy/download are optional and nothing is stored by the tool.
