Diff Checker
Paste two texts to see exactly what changed. Line numbers, add/remove counts, and optional whitespace/case normalisation.
Original (A)1 lines
Modified (B)1 lines
QA use cases for text diffing
Compare expected vs actual API response bodies when a test fails — paste both into the diff tool to pinpoint the exact lines that differ rather than reading the full JSON manually. Also useful for comparing two versions of a config file, two SQL queries, or two API contract specifications.
The ignore-whitespace option is particularly useful when comparing responses from different environments where indentation may differ but values should be identical.