Wordtune

Wordtune accepts a piece of text — a sentence, a paragraph, an email — and returns a set of alternative phrasings ranked by contextual fit. The core workflow is selection, not generation: you write something, Wordtune suggests how to say it better, and you choose. Tone buttons flip the register between casual and formal. A grammar and spelling layer flags errors before the suggestions appear. For non-English writers, a translation feature rewrites input from ten supported languages into natural English, not word-for-word translated output.

The differentiating feature is contextual suggestion quality. Rather than returning generic paraphrases, the vendor states that suggestions are trained to match the style and subject matter already present in your text. A summarization mode works on both documents and videos, condensing long material into scannable takeaways. The ‘continue writing’ feature extends a paragraph when you stall — it picks up on tone and topic, not just syntax.

Wordtune fits individual professionals, non-native English speakers, and content creators who need sentence-level polish on a tight turnaround. It does not fit teams building content pipelines, editors managing brand voice across a publication, or developers who need deep API integration for automated workflows. The free tier exists but is usage-capped; advanced proofreading and higher rewrite volume are paid-only features. There is no self-hosted option, so any content you paste is processed on AI21 Labs’ infrastructure — a consideration for teams handling confidential or regulated text.

The Chrome extension carries a 4.7/5 rating and brings the rewrite interface directly into Gmail, Google Docs, and other browser-based editors. The API is available for developers who want to embed rewriting capabilities into their own products, though the docs describe this as a writing assistance endpoint rather than a full LLM interface.