Wordtune

Wordtune is an AI writing companion focused on one thing: making your sentences better. Highlight any sentence and it offers multiple rewrites — more casual, more formal, shorter, longer — so you keep your ideas while improving how they land. Unlike full-document generators, Wordtune keeps you in control, suggesting rather than replacing.

Built by AI21 Labs, it also includes Spices (smart continuations like adding an example, statistic or counterargument), a summarizer for long articles and PDFs, grammar correction, and translation-to-English rewriting that makes it a favorite among non-native English speakers.

Pricing (as of mid-2026): a free plan with a daily rewrite allowance; Premium typically $10–15/month (less annually) for unlimited rewrites and full features. It works as a Chrome extension across Gmail, Google Docs, LinkedIn, Notion and most web editors, plus web and desktop apps.

Strengths: excellent sentence-level rewrites that preserve your voice, seamless in-browser workflow, great for ESL professionals. Weaknesses: it polishes rather than generates — for drafting whole documents from scratch you'll still want ChatGPT or Claude; and the free daily limit is easy to hit on heavy editing days.

Who it's for: professionals writing high-stakes emails, non-native English speakers, and anyone who drafts fine but wants every sentence a notch sharper.