Source

Private to this browser

JSON comparison

Compare the change, not just the text

Capture a baseline, update the working source, then inspect added, removed, changed, and moved structure.

Nothing leaves this browser

What this route does

Comparison is ad hoc evidence. Use Plan when the change needs declared intent, compatibility review, and a handoff.

Compare revisions

A baseline is a separate local snapshot. It is not a contract plan.

Capture the version you want to compare

Capture the current source, then edit Source. Toolzy JSON keeps each side intact and shows whether an array uses index or declared identity semantics.