Wordtune

Wordtune, developed by AI21 Labs, is a rewriting assistant offering multiple variants of the same sentence (more formal, more concise, more persuasive) in one click, directly in a browser extension or Word/Google Docs module. The tool also includes automatic summarization of long texts, short content generation from a prompt and basic grammar correction. The free plan limits daily rewrites; the Advanced plan (~$4.89/month billed annually) removes this limit and adds custom tone styles; the Unlimited plan (~$6.99/month billed annually) adds unlimited generation and long document summarization.

Wordtune is built and optimized for English; its rewriting, tone-change and summarization features are not reliable or advertised as functional in French, significantly limiting its value for purely French writing. It remains relevant for a freelancer or SME needing to draft emails, LinkedIn posts or export content in English. No public API is offered, the tool working exclusively via browser extensions and consumer apps.