Wordtune

An AI writing companion by AI21 Labs that helps you say exactly what you mean. Wordtune goes beyond grammar checking — it rewrites sentences to be clearer, more concise, or more formal, and can expand your ideas into full paragraphs while preserving your original intent.

• Sentence rewriting — get multiple alternative phrasings for any sentence • Tone adjustment — shift between casual, formal, and professional registers • Expansion — develop brief notes into detailed paragraphs with AI • Summarization — condense long articles and documents into key points • Cross-platform — browser extension works in Gmail, Docs, social media, and more • Multilingual input — write in your language and get fluent English alternatives

Free tier with limited rewrites. Premium at $9.99/mo for unlimited access.