Wordtune
AI rewriting and paraphrasing assistant from AI21 Labs that polishes tone, summarizes long content, and drafts in your voice.
Pick Wordtune if you want an inline rewriter that improves tone and clarity in your existing writing without rewriting it from scratch.
Skip it if you need a full generative chat assistant, long-form drafting agent, or a coding-aware writing tool.
Wordtune is a browser-based AI writing assistant built by AI21 Labs that focuses on rewriting, paraphrasing, and tone-shifting rather than wholesale generation. It lives inside a Chrome/Edge extension, an iOS app, and a web editor, and surfaces inline alternative phrasings, formal/casual register swaps, shorten/expand suggestions, grammar fixes, and a continuation prompt that helps push past writer's block. It also bundles a Read assistant that summarizes long articles, PDFs, and YouTube videos, plus Smart Translate from ten languages into English.
The pitch is style-preserving editing for non-native English speakers, students, marketers, and knowledge workers who don't want their prose to read like generic LLM output. There's a real free tier (limited daily rewrites) and Premium plans that unlock unlimited rewrites, the Spices generative tools (counterarguments, examples, statistical facts), and the AI summarizer; Wordtune publicly emphasizes citing multiple sources when generating facts, which is unusual in this category.
It's a good drop-in alternative to Grammarly for people who care more about phrasing than red-underline grammar policing, though it's narrower than a full ChatGPT workflow and the free quota is tight. Integrations cover Gmail, Google Docs, LinkedIn, Notion, Slack, and most web text fields via the extension.
Wordtune is the most credible style-rewriter on the market and the one we recommend to ESL writers and marketers who hate how cookie-cutter raw LLM output sounds. It's narrower than ChatGPT or Claude, but that focus is the point. The free tier is enough to evaluate; Premium is worth it if you write daily.
— The AI Tool Bible editorial team
Pros
- ✅ Style-preserving rewrites that don't flatten your voice
- ✅ Works inline across Gmail, Docs, LinkedIn, Slack, and most web editors
- ✅ Built-in summarizer for articles, PDFs, and YouTube videos
- ✅ Strong fit for non-native English speakers polishing tone
Cons
- ⚠️ Free tier is capped at a small number of daily rewrites
- ⚠️ Narrower than a full chat-based LLM workflow
- ⚠️ Spices and AI writer features are gated behind Premium
Use cases
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