How this rephraser works
This swaps common words for close synonyms from a built-in dictionary, at a strength you control - Light changes a few words, Heavy changes most of the eligible ones. Everything runs in your browser; your text is never sent to a server.
Why this uses word-level substitution instead of rewriting sentences
Unlike this site's other rewriting tools that restructure whole sentences, this one specifically swaps individual words for dictionary-matched synonyms while leaving sentence structure untouched - a lighter-touch approach suited to quickly varying wording without changing the underlying grammar or flow of what you wrote.
Why the strength slider changes the probability, not the dictionary
Every eligible word always has the same pool of possible synonyms available - what the strength slider actually changes is the likelihood that any given eligible word gets swapped at all. Light strength swaps only a few scattered words; Heavy strength swaps nearly every word that has a dictionary match, which is why running the same text twice at a high strength still produces a noticeably different result each time.
Why this is a starting point, not a finished rewrite
Because it works word-by-word rather than understanding full sentence meaning, a synonym swap can occasionally produce a word that's technically close in meaning but awkward in that specific context - always read the output back and adjust anything that doesn't quite fit before using it anywhere final.