Wordtune

Wordtune is a free AI writing assistant focused on paraphrasing and rewriting rather than just catching errors. It suggests context-based rewrite options that adapt to a user's existing writing style, lets users switch a passage between formal and casual tone with one click, and layers in proofreading for spelling, grammar, and phrasing. A notable feature is its approach to factual claims: Wordtune states it checks at least five sources before treating a fact as credible enough to suggest in a rewrite, aiming to keep AI-assisted rewriting grounded rather than just fluent. The tool is available as a free browser extension with no credit card required to start.