Wordtune
: How to use it, features, and the business problems it solves
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What is Wordtune?
An AI writing assistant strong at rephrasing (paraphrasing) English text. It offers tone-adjusted rewrites, summarization, AI text generation, grammar checking, and 'Humanize' to make AI text sound natural, usable via a browser extension or editor. By AI21 Labs. It is English-centric and effectively does not support Japanese proofreading/rewriting.
Business problems it solves
About "Wordtune"
What is Wordtune
Wordtune is an AI writing assistant strong at rewriting (paraphrasing) English text. Under the banner "Express yourself with confidence," it has grown into a "reading and writing" assistant that offers, beyond rewriting and tone adjustment, summarization, AI text generation, grammar checking, and "Humanize" to make AI text sound natural. It is operated by AI21 Labs (Israel).
Wordtune is strong at "English writing assistance," but effectively does not support Japanese proofreading/rewriting. It mainly offers paraphrasing (rewording), casual/formal tone changes, shorten/expand, summarization, text generation, and grammar checking, usable via browser extensions (Chrome/Edge), an editor, and an iOS app. The AI model used is not publicly disclosed.
How to use
Select English text in the extension or editor and rewrite it.
Set it up
Install the browser extension or open the Wordtune editor.
Select text
Select the English text you want to rewrite.
Rewrite & adjust
Choose from rewrite options, tone changes, or shorten/expand.
Polish
Refine with summarization, grammar check, and Humanize.
The free plan allows 10 rewrites/AI suggestions per day and 3 summarizations per month. Paid plans have a 3-day free trial (card required) and raise the limits.
Key features
01Rewrite & tone adjustment
Centered on paraphrasing English text, it supports casual/formal tone changes and shorten/expand. It also offers context-aware expansion suggestions ("Spices") and a smart synonym generator.
02Summarize, generate, proofread
Supports summarizing articles and documents (Read & Summarize), AI text generation (Continue writing), grammar/spelling checks, and proofreading. It also has "Humanize" to make AI text sound natural.
03Extensions & integrations
Usable via Chrome/Edge browser extensions, an iOS app, and across various apps. It also supports smart translation and fact-checking of its answers (referencing multiple sources).
Pricing
You can start for free; the figures below are the monthly price when billed annually (monthly billing is higher). Plans differ by rewrite counts, etc.
| Plan | Monthly (billed yearly) | Monthly billing | Key limits |
|---|---|---|---|
| Basic (free) | $0 | $0 | 10 rewrites/AI suggestions per day, 3 summaries/month |
| Advanced | $4.89 | $6.99 | 30 rewrites/AI suggestions per day, 15 summaries/month |
| Unlimited (recommended) | $6.99 | $9.99 | Unlimited rewrites, summaries, and suggestions |
Paid plans include a 3-day free trial (card required). Students, educators, and nonprofits get an extra discount. A business tier (Wordtune for business) is by inquiry. Prices are in USD and subject to change; check the official site for the latest (as of August 2026).
How it differs from other writing AIs
Wordtune stands out for being strong at "rewording (paraphrasing)" English and crafting natural expression. Compared with grammar-correction-centric tools or general conversational AIs, it goes further into nuance-tuning English. However, it effectively does not support Japanese proofreading/rewriting.
| Aspect | Wordtune | Grammarly | ChatGPT |
|---|---|---|---|
| Focus | English rewording/adjustment | English grammar/proofreading | General conversational AI |
| Strength | Paraphrase, tone, Humanize | Grammar/expression fixes | Broad generation |
| Japanese | Effectively unsupported | Limited | Supported |
Grammarly, for English proofreading, and ChatGPT, a general AI, make good points of comparison (for Japanese, DeepL and the like are better suited). If you want to naturally refine English phrasing, Wordtune is a strong option.
The information on this page is based on the official site as of August 2026. Please check the official site for the latest specifications and pricing.
