Diff Checker
Compare two blocks of text and see additions, deletions, and changes highlighted line by line — fast, private, and runs in your browser.
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Everything you need to know
Compare Text Side by Side
Paste your original text on the left and modified text on the right. The tool instantly computes the diff and presents results with clear color coding — green for added lines, red for removed lines, and white for unchanged content.
Line-by-Line Diff with Line Numbers
Each line in the diff output shows both the original and modified line numbers, making it easy to reference specific changes. The unified diff format is familiar to anyone who uses Git or code review tools.
Comparison Options
Fine-tune the comparison with two toggles: Ignore case treats "Hello" and "hello" as identical, while Ignore whitespace normalizes spaces and tabs. These options help you focus on meaningful content changes rather than formatting differences.
Statistics at a Glance
The stats panel shows the total number of added, removed, and unchanged lines — giving you an instant overview of how much has changed between the two versions.
Use Cases
Perfect for comparing code versions, configuration files, API responses, document drafts, translated text, database records, or any two pieces of text you need to check for differences.
Related Tools
Format JSON before comparing with the JSON Formatter, change text case with the Text Case Converter, or count words with the Word Counter.