Wordtune

Wordtune, developed by AI21 Labs, is an AI-powered writing companion that specializes in sentence-level rewriting and rephrasing rather than generating content from scratch. This focused approach makes it uniquely valuable for writers who want to improve and polish their own text rather than replace it with AI-generated copy. At its core, Wordtune offers multiple rewrite suggestions for any highlighted sentence, letting you choose between casual and formal tones, shorter or longer versions, and entirely different phrasings that preserve your original meaning and intent. The Wordtune Read feature can summarize lengthy documents, articles, and PDFs, extracting key points and actionable insights so you can quickly grasp complex material without reading every word. The Wordtune Editor provides a full writing environment with AI suggestions appearing inline as you type, functioning like an intelligent autocomplete that learns from context. For non-native English speakers, Wordtune is particularly powerful — it understands the intent behind awkward or unnatural phrasing and suggests fluent, idiomatic alternatives that sound like they were written by a native speaker. The Spices feature adds creative elements to your writing, such as making a point with an analogy, adding a counterargument, or inserting a relevant statistic. The browser extension integrates seamlessly with Gmail, Google Docs, LinkedIn, Twitter, Slack, and dozens of other platforms where you write daily. AI21 Labs, the company behind Wordtune, is a leading AI research lab that develops its own proprietary large language models, giving Wordtune a fundamental technology advantage over tools that rely solely on third-party APIs. The Premium tier adds unlimited rewrites, precise tone and length controls, the full summarization capability, and priority access to new features.