LanguageTool Grammar and Spell Checker
With this extension you can check text with the style and grammar checker LanguageTool. It finds many errors that a simple spell checker cannot detect, like mixing up there/their, a/an, or repeating a word.
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What LanguageTool Grammar and Spell Checker does
LanguageTool Grammar and Spell Checker is a browser extension published by LanguageTooler GmbH. The official listing describes its purpose as: “With this extension you can check text with the style and grammar checker LanguageTool. It finds many errors that a simple spell checker cannot detect, like mixing up there/their, a/an, or repeating a word.” This guide combines verified store information, installation, first-use instructions, settings, browser support, permissions, privacy notes and troubleshooting so readers can decide whether the extension fits a real workflow.
LanguageTool Grammar and Spell Checker is available through the official Chrome, Edge and Firefox stores linked on this page. Use those buttons instead of downloading an extension package from a third-party directory. Availability can differ by browser and can change over time, so a browser is shown only when a matching official listing has been recorded.
Type in a supported web editor and wait for LanguageTool to underline spelling, grammar or style issues.
Select an underline to read the explanation and apply a suggested correction.
Open the popup to select a language, sign in or change checking behavior for the current website.
How to install LanguageTool Grammar and Spell Checker
Open the official store icon for the browser you currently use: in Chrome choose Add to Chrome, in Microsoft Edge choose Get; and in Firefox choose Add to Firefox. Confirm that the title is LanguageTool Grammar and Spell Checker and the developer is LanguageTooler GmbH, then read the permission dialog before accepting the installation.
After installation, open the browser’s Extensions menu and pin LanguageTool Grammar and Spell Checker if its toolbar icon is hidden. Reload any tab that was already open before installation. Start on a non-sensitive page and verify the extension’s basic behavior before granting optional access, importing data or connecting an account.
Match the developer name: LanguageTooler GmbH.
Use only the official Chrome, Edge and Firefox links recorded above.
Review requested access before confirming installation.
First-use workflow for LanguageTool Grammar and Spell Checker
The safest way to learn LanguageTool Grammar and Spell Checker is to complete one representative task from beginning to end. Open the extension popup, dashboard or supported page, identify the primary action, then check what changed in the browser. Do not enable every optional setting at once because that makes conflicts harder to diagnose.
Follow this documented sequence: Type in a supported web editor and wait for LanguageTool to underline spelling, grammar or style issues. Select an underline to read the explanation and apply a suggested correction. Open the popup to select a language, sign in or change checking behavior for the current website. Add a correct specialist term to the personal dictionary instead of repeatedly ignoring the same alert. These steps are based on the official listing, product site or project documentation recorded in the sources rather than on an assumption from the extension’s name.
Type in a supported web editor and wait for LanguageTool to underline spelling, grammar or style issues.
Select an underline to read the explanation and apply a suggested correction.
Open the popup to select a language, sign in or change checking behavior for the current website.
Add a correct specialist term to the personal dictionary instead of repeatedly ignoring the same alert.
Documented features and settings
★ Finds many errors that a simple spell checker cannot detect ★ No registration needed ★ Supports more than 25 languages (see below) ★ Works on almost any website including Gmail, Facebook, X/Twitter
This extension ensures that your writing is error-free via the grammar and style checker LanguageTool. LanguageTool detects many errors that a simple spell checker cannot, such as grammar issues, commonly confused words, and punctuation oversights. Additionally, LanguageTool offers style suggestions to elevate your writing: synonym replacements for overused words, concise rephrasing of wordy sentences, and formal alternatives to commonly used expressions.
LanguageTool is designed with simplicity in mind, instantly analyzing your text as you type. It is compatible with most platforms, including social networks such as X/Twitter and LinkedIn, and e-mail services such as Gmail.
Type in a supported web editor and wait for LanguageTool to underline spelling, grammar or style issues.
Select an underline to read the explanation and apply a suggested correction.
Open the popup to select a language, sign in or change checking behavior for the current website.
Add a correct specialist term to the personal dictionary instead of repeatedly ignoring the same alert.
Practical use cases for LanguageTool Grammar and Spell Checker
Use LanguageTool Grammar and Spell Checker for a task that matches its official purpose, then compare the result with the same task when the extension is disabled. This makes the benefit measurable and also reveals whether a page change, automatic action or saved data creates an unwanted side effect.
For work, research or important accounts, test with a copy or non-critical page first. Keep an independent backup when the extension stores passwords, tabs, scripts, filters or settings. Browser extensions can shorten a workflow, but they do not replace the original website, a backup or independent verification of an important result.
Begin with one representative page or task.
Change one setting at a time and compare the result.
Keep a backup when the extension stores important local data.
Free features, paid plans and accounts
The official service offers free checking and paid Premium or business features. Supported limits, languages and prices can change and should be confirmed on the official pricing page.
Pricing, account limits and platform support can change after this guide is written. Before paying or creating a business workflow, check the official website for current regional pricing, trial conditions, renewal terms, cancellation rules and the exact feature included in each plan. A donation link is not the same thing as a required subscription.
Confirm whether the feature you need requires an account.
Check current plan limits on the developer’s website.
Review renewal and cancellation terms before checkout.
Permissions, privacy and current version
The captured listing reports version 11.3.1 and update timestamp 2026-08-20T13:19:16Z. It declares or requests access including: activeTab, storage, contextMenus, scripting, alarms, http://*/*, https://*/*, file:///*, *://docs.google.com/document/*, *://docs.google.com/presentation/*, *://languagetool.org/*, https://languagetool.org/*/webextension/premium-announcement*, https://languagetool.org/webextension/premium-announcement*, http://localhost:8000/*/webextension/premium-announcement*, http://localhost:8000/webextension/premium-announcement*. A permission describes technical access, not proof of how data is used, so read both the browser prompt and the developer’s current privacy policy.
A suggested rewrite can change meaning, names or technical terminology, so review the complete sentence before accepting it. Browser checking is different from desktop integrations; verify support for the editor you plan to use. Text-processing and account features follow LanguageTool’s current privacy policy and plan terms. Use browser site-access controls when a permission is optional, and disable the extension temporarily when diagnosing a page conflict. Remove it if its current behavior, ownership or requested access no longer matches your needs.
A suggested rewrite can change meaning, names or technical terminology, so review the complete sentence before accepting it.
Browser checking is different from desktop integrations; verify support for the editor you plan to use.
Text-processing and account features follow LanguageTool’s current privacy policy and plan terms.
Common questions about LanguageTool Grammar and Spell Checker
People searching for “spell and grammar checker” and related terms such as “download grammar and spelling checker” and “spelling and grammar check language tool” commonly need the correct official download, a current setup guide or help with a feature that changed. Use the store icons above, follow the first-use workflow and compare the installed interface with the 4 official images on this page. This site does not host or repackage the extension file.
If LanguageTool Grammar and Spell Checker does not appear after installation, confirm that it is enabled, pin its icon and reload the target tab. If a documented feature still fails, check browser site access, account state and the current official support material. Disable other page-changing extensions one at a time to isolate conflicts before reinstalling.
Reload the target tab after changing extension settings.
Check site access and account status before reinstalling.
Use the official support or repository issue tracker for product-specific errors.