Text Diff Checker
Paste two versions of any text and instantly see what changed — added lines in green, removed lines in red, unchanged lines in grey. Great for comparing drafts, configs, messages or snippets. Runs in your browser; nothing is uploaded.
Differences
FAQ
How does the text diff work?
Paste your original text on the left and the changed text on the right. The tool compares them line by line using a longest-common-subsequence diff and highlights added lines in green and removed lines in red, with unchanged lines in grey.
Is my text private?
Yes. The comparison runs entirely in your browser with JavaScript — nothing is uploaded or stored. You can use it offline once the page has loaded.
What can I use it for?
Spotting edits between two drafts, comparing config files or code snippets, checking what changed in a contract or message, or proofreading two versions of an article.
Does it compare word by word?
It compares whole lines. To see fine changes within a sentence, put each sentence or phrase on its own line in both boxes so the line-level diff lines them up.
More tools: word & character counter, text case converter, and the full tools list.