The original Redactle seems to have died, but IMO the replacement Reactle Unlimited is better! Generally better-done redaction, and there’s an option where you can display the number of letters in each blanked-out word - which saves me a LOT of time counting!
And when it’s something unguessable (eg: Bologna Process) you can use up to three hints, each reveals one word of your choice (but NOT any word in the title!).