Text Diff Checker

Compare two texts and see every change

Paste two versions of anything - a document, a config file, an email draft, a block of code - and this tool highlights exactly what was added, removed and changed between them, line by line. It's the fastest way to answer 'what actually changed?' without reading both versions word by word. Everything is compared in your browser, so contracts, code and confidential drafts stay on your device.

How the comparison works

The diff aligns the two texts and marks differences: removed content from the first version, added content from the second, with unchanged lines shown for context. This is the same idea behind the diffs in Git and code review tools, applied to any plain text. It's ideal for spotting an edit someone made to a shared document, confirming which lines you changed in a file, comparing terms between two contract drafts, or checking whether two configs that 'should be identical' really are.

Small formatting differences - trailing spaces, changed line endings, a tab swapped for spaces - will show up as changes, because they genuinely are changes. That precision is the point when you're hunting a bug caused by an invisible character.

A quick pre-commit and proofreading check

Developers use text diffs to review what they're about to commit; writers and editors use them to see what a collaborator altered in a returned draft. Either way, the value is the same: certainty about the exact scope of a change instead of a vague sense that something moved. Once you've confirmed the differences, tools like our Find & Replace and Sort Lines help you clean up or normalise the text before finalising it.