Free tool
Find the contradiction before your readers do.
Paste the facts that must stay true, and a scene that might break one. No account, no card, nothing to install.
One fact per line, up to ten. 3 so far.
Paste a paragraph or two.
No account needed. Five checks a day.
The example is already filled in — press the button and watch it catch the eye.
This is the same check that runs inside Fantasy Writer against your whole lore bible, at chapter length, on every draft. Here it is three facts and one scene.
This is the small version.
Inside Fantasy Writer the same check runs against your whole lore bible — following the links between entries, not just the words in them — across a chapter at a time, on every draft. You never paste anything.