Wordtune
AI writing companion that rewrites sentences for clarity, tone and length.
About
Wordtune is AI21 Labs' AI writing assistant built around contextual sentence rewriting rather than full-document generation. Highlight any sentence and it suggests alternative phrasings; you can also switch tone (casual to formal) and length, generate continuations with 'Spices' (examples, counterarguments, statistics), summarize long documents or YouTube videos, and translate other languages into fluent English. It works via browser extension across Gmail, Google Docs, LinkedIn and social platforms.
The free Basic plan covers 10 rewrites per day plus unlimited grammar and spelling corrections; Advanced ($13.99/mo, $6.99/mo annual) and Unlimited ($19.99/mo, $9.99/mo annual) raise the caps, with a Business tier adding team billing and brand-tone customization. It suits non-native English speakers and professionals polishing emails and documents — it is not a long-form autonomous writing tool, and like all rewriting AIs it can occasionally garble meaning, so key sentences deserve a human read.
What it can do
- Contextual sentence rewriting with alternatives
- Tone switcher (casual to formal) and length control
- Spices content continuation (examples, stats, jokes)
- Document and YouTube video summarizer
- Grammar and spelling correction
- Translation into fluent English
Setup
Install the Chrome/Edge extension or use the web editor at wordtune.com; sign up for a free account.
Prerequisites
A browser (for the extension) or any text to rewrite; an AI21 Labs account.
Use cases
Works with
Trust score — 8/10
Scored 8/10 (verified tier, metrics-v1). Evidence: Verified via vendor site/docs/GitHub and reputable coverage, wave 64; Trending score 80/100 from researcher assessment.
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.