Text Compare & Diff Checker
Paste two blocks of text below to highlight the exact differences. The comparison happens entirely in your browser.
Original Text
Changed Text
Differences
What is a Diff Checker?
A diff checker is a comparison tool that finds and highlights the exact differences (additions, deletions, and modifications) between two pieces of text, code, or data. It is an essential utility for programmers reviewing code changes, editors comparing document versions, and anyone trying to spot subtle differences between two files.
Frequently Asked Questions
Is my text uploaded to a server?
No. Your text is processed entirely within your web browser using JavaScript. No data is ever sent to or stored on our servers, making this tool 100% private and secure.
What is the difference between comparing lines and words?
Comparing by "lines" is best for source code, as it highlights entire rows that have changed. Comparing by "words" or "characters" is better for prose and articles, as it highlights the specific words or letters that were modified within a sentence without marking the whole sentence as changed.