Paste two versions of a function, snippet, or file - get a side-by-side diff with word-level change highlights. Useful when reviewing a PR without local checkout, comparing AI-generated code variants, or spotting the one-character typo between 'working' and 'broken'.
When to use this
Use to: review pull request diffs in a clean side-by-side view, compare a fresh AI code suggestion against your existing function, diff stack-overflow answers to pick the cleaner one, verify that a refactor preserved behavior at the line level.
Frequently Asked Questions
Does it show what's syntactically equivalent vs different?
Word-level diffing catches most code changes accurately. For perfectly semantic equivalence (`var x = 1` vs `let x = 1` if behavior is the same), you'd need an AST-based tool. Our diff is text-based but word-aware, which catches the practical 95% of real-world code reviews.
Can I diff minified vs unminified code?
Yes but it'll be noisy - the structural differences (whitespace, newlines, semicolons) drown out real changes. Beautify both sides first using a code formatter, then diff.
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