About DiffLens

DiffLens is a small, free tool for comparing two blocks of text and seeing exactly what changed. It was built to do one job well: give you a clear, accurate diff in a couple of seconds without asking for an account, a payment, or your data.

Everything happens in your browser using a standard longest-common-subsequence diff algorithm — the text you paste is never sent to a server or stored anywhere. Compare by line for code and paragraph edits, or by word for fine-grained wording changes.

DiffLens is supported by ads shown alongside the tool, which keeps it free to use with no limits. It's one of a growing set of small tools at Laborilo.