Diff Checker

Simply paste your original text in the left panel and the modified text in the right panel, then click "Compare". The tool will instantly highlight all differences - additions in green, deletions in red. You can also load sample data to see how it works.

Line comparison treats each line as a unit and is best for comparing code or structured text. Word comparison highlights individual word changes and works great for prose or documentation. Character comparison shows every single character difference - it's the most detailed but can be noisy for large texts.

Yes! Enable the "Ignore whitespace" option to skip differences caused by spaces, tabs, or trailing whitespace. This is particularly useful when comparing code that may have different formatting or indentation styles but identical logic.

Side by Side shows original and modified texts in parallel columns, making it easy to see what changed where. Lines are aligned so you can directly compare corresponding sections. Inline (unified) view shows everything in a single column with deletions and additions marked with - and + prefixes, similar to git diff output.

Absolutely. All comparisons happen directly in your browser using JavaScript. Your text never leaves your device - we don't store, transmit, or have access to any content you compare. This makes the tool completely safe for comparing sensitive code, configuration files, or any private data.