Upgrade Required to Use the LanguageTool Browser Extension
We have made the difficult decision to limit the use of LanguageTool’s browser extension to Premium users only. The rise of generative AI has made it more challenging to sustainably monetize our offering. A majority of users use our products for free, and the relatively small percentage of Premium subscribers is all that is subsidizing our continuously increasing server costs. To improve our Premium experience and to sustain our business model, we’ll be making the LanguageTool browser extension available exclusively for paying customers.
You can now use LanguageTool Premium for free for 14 days
For two weeks, you can try LanguageTool Premium for free. All Premium features inside the browser extension have been automat…
Upgrade Required to Use the LanguageTool Browser Extension
We have made the difficult decision to limit the use of LanguageTool’s browser extension to Premium users only. The rise of generative AI has made it more challenging to sustainably monetize our offering. A majority of users use our products for free, and the relatively small percentage of Premium subscribers is all that is subsidizing our continuously increasing server costs. To improve our Premium experience and to sustain our business model, we’ll be making the LanguageTool browser extension available exclusively for paying customers.
You can now use LanguageTool Premium for free for 14 days
For two weeks, you can try LanguageTool Premium for free. All Premium features inside the browser extension have been automatically unlocked. During this timeframe, you can decide whether you want to continue using the browser extension and become a paying subscriber. Afterward, LanguageTool’s grammar checker and paraphraser will stop working for free users on the extension.
What LanguageTool Premium includes
Translation NEW
Seamlessly and easily translate between 10+ languages. Eliminate the need to copy and paste your text between different text fields.

Improved Grammar Checking
Use our more advanced AI-based grammar checker to instantly fix problems with agreement, word choice, and commas.

Stylistic Suggestions
LanguageTool Premium goes beyond grammar and spelling correction. Get suggestions to improve your tone and voice in real time.

Generative AI
Generate text with AI prompts inside your favorite web apps. Whether you’re writing emails, documents, or social posts, instant assistance is always at your fingertips.

And there’s more ...
Explore all benefits of LanguageTool Premium
Frequently Asked Questions
Why are you making the browser extension available only to Premium users?
Over the past few years, the cost of providing our users a competitive grammar checker has increased considerably. It’s no longer sustainable to proceed as is, especially since the majority of our 6 million browser extension users use the service for free. Relying on business models like advertising or selling our users’ data would potentially allow us to continue a free service but are absolutely contrary to our company’s values.
What additional features does LanguageTool Premium offer?
You can find a full list of Premium features here.
Can I still use the website for free?
Yes. Only the browser extension will be exclusive to Premium users.
What happens after the 14-day trial ends?
LanguageTool’s browser extension will stop underlining grammar, punctuation, and spelling errors. Additionally, the paraphrasing and synonym functionality will stop working.
Is LanguageTool’s server still open-source?
Yes. If you are a developer, you can still host and run your own instance of LanguageTool’s server. The browser extension will continue to work as it currently does for users who use it with their own server.
How do I get LanguageTool Premium?
Please go to the LanguageTool website and choose a Premium plan that suits your needs.
Are there any free alternatives?
Yes. Our sister brand, QuillBot, offers a free grammar checking and paraphrasing browser extension that works just as well as LanguageTool for English, French, German, Spanish, Dutch, and Portuguese. Give it a try.