Wordtune

Wordtune from AI21 Labs focuses on rewriting. Highlight a sentence, and it offers several alternatives with different tones, from casual to formal, or shorter and longer versions that keep your meaning. It works as a browser extension and in Word, Google Docs and email, and it has a summarizer and a reading assistant for long documents. The goal is to help your own writing sound better rather than to write for you. Wordtune has a free plan with limited rewrites and paid plans for unlimited use. It is popular with professionals and non-native English speakers.