{"passport":{"unfragile":{"@version":"1.0","version":"2026-05","artifact":{"id":"languagetool","slug":"languagetool","name":"LanguageTool","type":"extension","url":"https://languagetool.org","page_url":"https://unfragile.ai/languagetool","categories":["browser-extensions"],"tags":[],"pricing":{"model":"free","free":true,"starting_price":null},"status":"active","verified":false},"capabilities":[{"id":"languagetool__cap_0","uri":"capability://safety.moderation.real.time.grammar.and.spelling.detection.across.browser.text.fields","name":"real-time grammar and spelling detection across browser text fields","description":"Detects grammar errors and spelling mistakes as users type in any web form field (email, comments, posts, chat) by injecting content scripts into the DOM and analyzing text against a rule-based engine with 20,000+ checks for premium languages. The extension works inline without storing text, providing instant visual feedback with underlined errors and correction suggestions directly in the text field.","intents":["catch grammar and spelling mistakes before sending emails or publishing content","get real-time feedback while composing text in web applications","ensure professional writing quality across all web-based communication platforms"],"best_for":["non-native English speakers writing in web browsers","professionals composing emails and documents in Gmail, Outlook, web forms","content creators publishing to blogs, social media, and forums"],"limitations":["does not work in password fields or encrypted text inputs due to browser security restrictions","character limit of 150,000 per text field may cause performance degradation on very large documents","cannot detect context-dependent errors that require semantic understanding beyond rule-based patterns","free tier limited to basic grammar/spelling checks; enhanced 20,000+ check suite only available for 7 languages in premium tier"],"requires":["Chrome, Firefox, Edge, Safari, Opera, or Yandex browser (specific versions unknown)","active internet connection for cloud-based suggestion processing","text input field accessible to browser extension content scripts (not sandboxed iframes)"],"input_types":["plain text in web form fields","email composition fields","social media post text areas","chat and messaging application text inputs"],"output_types":["inline visual error markers (underlines/highlights)","correction suggestions in popup tooltips","error categories (grammar, spelling, punctuation)"],"categories":["safety-moderation","text-generation-language"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"languagetool__cap_1","uri":"capability://text.generation.language.ai.powered.sentence.paraphrasing.with.configurable.tone","name":"ai-powered sentence paraphrasing with configurable tone","description":"Generates alternative phrasings of sentences using a state-of-the-art AI model with user-selectable tone options (formal, fluid, shorter variants). Users highlight text and trigger paraphrasing to receive multiple rewrite suggestions that maintain semantic meaning while adjusting formality, conciseness, or flow. This feature is premium-only and processes text through cloud-based AI inference.","intents":["rephrase awkward sentences to improve readability and flow","adjust writing tone from casual to formal or vice versa without rewriting manually","generate multiple alternative phrasings to choose the best fit for context"],"best_for":["professional writers and editors refining document tone","non-native speakers seeking natural-sounding alternatives to their phrasing","content creators adapting writing for different audiences (formal reports vs casual blogs)"],"limitations":["premium feature only — not available in free tier","specific AI model name and architecture unknown, limiting ability to predict quality or bias","paraphrasing quality depends on sentence length and context; very long or ambiguous sentences may produce less useful suggestions","no offline capability — requires active internet connection and cloud processing","no user control over underlying model selection or parameters"],"requires":["LanguageTool premium subscription","active internet connection for cloud AI inference","text selection capability in supported application (browser, desktop app, or web editor)"],"input_types":["selected text (sentence or paragraph)","tone parameter (formal, fluid, shorter)"],"output_types":["multiple paraphrased text suggestions","tone-adjusted alternatives"],"categories":["text-generation-language"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"languagetool__cap_10","uri":"capability://tool.use.integration.open.source.self.hosted.server.deployment.option","name":"open-source self-hosted server deployment option","description":"LanguageTool is available as open-source software that organizations can deploy on their own servers, enabling on-premise checking without sending text to LanguageTool's cloud infrastructure. Self-hosted deployments support the same grammar, spelling, and style checking features as the cloud service, with full control over data retention and processing. Organizations can integrate the self-hosted server with custom applications via HTTP API or use it as a backend for custom browser extensions.","intents":["deploy LanguageTool on-premise for organizations with data privacy or compliance requirements","integrate LanguageTool checking into custom applications via HTTP API","avoid cloud service costs by self-hosting for large organizations with high checking volume"],"best_for":["enterprises with strict data privacy or compliance requirements (HIPAA, GDPR, etc.)","organizations building custom writing tools and needing grammar checking backend","teams with high checking volume where cloud API costs are prohibitive"],"limitations":["self-hosted deployment requires infrastructure and operational overhead — no managed service","open-source repository location and documentation unknown — unclear how to obtain and deploy","supported deployment environments unknown — no documentation on OS, container, or cloud platform support","API documentation and integration examples unknown — unclear how to integrate with custom applications","maintenance and update responsibility falls on organization — no automatic updates or patches","premium features (paraphrasing, picky mode, style guides) availability in self-hosted version unknown"],"requires":["server infrastructure (on-premise or cloud VM) to host LanguageTool server","Java runtime (likely — based on typical LanguageTool architecture, but not confirmed)","network connectivity between client applications and self-hosted server","operational expertise to deploy, configure, and maintain the server"],"input_types":["HTTP API requests with text to check","language parameter","optional: custom rule or dictionary configuration"],"output_types":["JSON API responses with error positions and suggestions","integration with custom client applications"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"languagetool__cap_11","uri":"capability://automation.workflow.team.collaboration.with.user.management.and.shared.resources","name":"team collaboration with user management and shared resources","description":"Team tier enables organizations to invite and manage up to 200 users under a single team account, with shared style guides, shared dictionaries, and unified billing. Team administrators can manage user access, configure team-wide writing standards, and track team writing statistics. All team members inherit premium features (paraphrasing, picky mode, enhanced checking) without individual subscriptions. Team resources (style guides, dictionaries) are synchronized across all team members.","intents":["enforce consistent writing standards across team members without individual configuration","manage multiple team members' subscriptions under a single team account","share custom terminology and style guides across team documents"],"best_for":["organizations with 10-200 team members requiring consistent writing standards","documentation and content teams needing shared style guides and terminology","companies with global teams writing in multiple languages"],"limitations":["team size limited to 200 users maximum — larger organizations may exceed this limit","user management interface and permission model unknown — unclear what administrative controls are available","team billing and cost allocation unknown — unclear how costs are calculated for team subscriptions","no version control or audit trail for shared resources — unclear how changes to style guides or dictionaries are tracked","no role-based access control documented — all team members may have equal permissions"],"requires":["LanguageTool team subscription","team administrator account to manage users and resources","team members with individual LanguageTool accounts (or automatic account creation)"],"input_types":["user email addresses for team invitations","shared style guide definitions","shared dictionary entries"],"output_types":["team member list and access management","shared style guides applied across team","shared dictionaries synchronized to all team members","team writing statistics and analytics"],"categories":["automation-workflow","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"languagetool__cap_2","uri":"capability://data.processing.analysis.multi.language.automatic.detection.and.rule.application","name":"multi-language automatic detection and rule application","description":"Automatically detects the language of input text across 30+ supported languages and dialects, then applies language-specific grammar, spelling, and style rules without requiring manual language selection. Detection occurs on-the-fly as users type, with fallback to manual language selection if auto-detection fails. Premium tier includes enhanced 20,000+ check suite for 7 languages (English, German, French, Spanish, Dutch, Polish, Portuguese).","intents":["write in multiple languages without manually switching language settings each time","get appropriate grammar rules applied automatically based on detected language","support multilingual teams and documents without configuration overhead"],"best_for":["multilingual writers and international teams","users frequently switching between languages in single documents","organizations with global audiences writing in multiple languages"],"limitations":["auto-detection accuracy unknown — no documentation on false positive/negative rates for language detection","enhanced 20,000+ check suite limited to 7 languages; other 23+ languages receive only basic grammar/spelling detection","dialect-specific rules unknown — documentation mentions '30+ languages and dialects' but specific dialect support matrix not provided","mixed-language documents may confuse auto-detection, requiring manual override","no user control over language detection confidence threshold or fallback behavior"],"requires":["text input in one of 30+ supported languages","active internet connection for language detection and rule application","optional: manual language selection if auto-detection fails"],"input_types":["plain text in any supported language","mixed-language text (with potential detection challenges)"],"output_types":["detected language identifier","language-specific grammar and spelling suggestions","style recommendations appropriate to detected language"],"categories":["data-processing-analysis","text-generation-language"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"languagetool__cap_3","uri":"capability://safety.moderation.custom.style.guide.creation.and.enforcement","name":"custom style guide creation and enforcement","description":"Allows users (premium tier) to define custom writing rules and terminology preferences that are enforced across all text checking. Style guides can specify preferred phrasings, terminology consistency, tone guidelines, and custom rules that override default LanguageTool checks. Team tier enables shared style guides across up to 200 users, enforcing organizational writing standards consistently. Rules are stored server-side and applied during text analysis.","intents":["enforce consistent terminology and phrasing across team documents","create organizational writing standards that all team members follow","customize grammar rules to match brand voice or technical documentation standards"],"best_for":["teams and organizations with specific writing standards (tech companies, publishers, enterprises)","documentation teams maintaining consistent terminology across large codebases","companies with brand guidelines requiring consistent tone and language"],"limitations":["style guide creation interface and rule syntax unknown — no documentation on how rules are defined or their expressiveness","no version control or change history for style guides — unclear how rule updates are managed","team tier limited to 200 users maximum; larger organizations may exceed this limit","rule application latency unknown — custom rule checking may add processing overhead","no export/import functionality documented — style guides may be locked into LanguageTool platform"],"requires":["LanguageTool premium subscription (personal) or team subscription (shared guides)","access to style guide creation interface in LanguageTool dashboard","team tier for shared style guides across multiple users"],"input_types":["custom rule definitions (syntax unknown)","terminology preferences","tone and style guidelines"],"output_types":["style guide enforcement flags in text checking","suggestions for rule violations","consistency reports (premium feature)"],"categories":["safety-moderation","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"languagetool__cap_4","uri":"capability://memory.knowledge.personal.and.team.dictionary.management","name":"personal and team dictionary management","description":"Maintains user-specific and team-specific dictionaries of custom terms, technical jargon, and proper nouns that should not be flagged as spelling errors. Users can add words to their personal dictionary during checking, and team tier enables shared dictionaries across all team members. Dictionary entries are stored server-side and applied during spell-checking to prevent false positives on domain-specific terminology.","intents":["prevent technical terms and proper nouns from being flagged as spelling errors","maintain consistent terminology across team documents without manual suppression","build domain-specific vocabulary (e.g., product names, technical acronyms) that grammar checkers don't recognize"],"best_for":["technical teams with specialized terminology (software, medical, legal, scientific)","organizations with proprietary product names and acronyms","multilingual teams with transliterated terms or non-English proper nouns"],"limitations":["dictionary management interface unknown — no documentation on how words are added, edited, or removed","no context-aware dictionary entries — words are added globally without part-of-speech or usage context","team dictionary limited to 200 users maximum; larger organizations may exceed this","no import/export functionality documented — dictionaries may be locked into LanguageTool platform","no conflict resolution mechanism if personal and team dictionaries contain conflicting entries"],"requires":["LanguageTool premium subscription (personal dictionary) or team subscription (shared dictionary)","access to dictionary management interface in LanguageTool dashboard or inline during checking"],"input_types":["custom words or terms to add to dictionary","optional: part-of-speech or usage notes (if supported)"],"output_types":["updated dictionary entries","suppressed spelling error flags for dictionary words","consistency across team documents"],"categories":["memory-knowledge","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"languagetool__cap_5","uri":"capability://safety.moderation.picky.mode.enhanced.checking.with.advanced.style.and.typography.rules","name":"picky mode enhanced checking with advanced style and typography rules","description":"Premium-only feature that enables 20,000+ additional grammar, style, punctuation, and typography checks beyond the basic rule set. Picky mode applies stricter rules for consistency (e.g., serial comma usage, spacing around punctuation, capitalization patterns) and style preferences (e.g., word choice, redundancy, clichés). Available only for 7 languages (English, German, French, Spanish, Dutch, Polish, Portuguese). Can be toggled on/off in settings to balance between strictness and false positive rate.","intents":["enforce strict style guidelines and consistency rules for professional publishing","catch subtle style issues and typography problems that basic checkers miss","improve writing quality by flagging redundancy, clichés, and weak word choices"],"best_for":["professional editors and publishers requiring high writing standards","technical writers maintaining consistency across large documentation sets","content creators aiming for polished, publication-ready text"],"limitations":["premium feature only — not available in free tier","limited to 7 languages (English, German, French, Spanish, Dutch, Polish, Portuguese); other languages receive only basic checks","20,000+ check count suggests high false positive rate — users may need to suppress many valid style choices","no granular control over which checks are enabled — all-or-nothing toggle between basic and picky mode","specific rules and thresholds unknown — users cannot customize which style rules apply"],"requires":["LanguageTool premium subscription","supported language (English, German, French, Spanish, Dutch, Polish, or Portuguese)","picky mode toggle enabled in settings"],"input_types":["text in supported language","picky mode toggle (on/off)"],"output_types":["enhanced style and punctuation suggestions","typography correction flags","consistency warnings"],"categories":["safety-moderation","text-generation-language"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"languagetool__cap_6","uri":"capability://text.generation.language.cross.platform.text.checking.via.dedicated.web.editor","name":"cross-platform text checking via dedicated web editor","description":"Provides a standalone web-based editor (LanguageTool Editor) where users can paste text or type directly for checking without installing browser extensions or desktop applications. The web editor supports the same grammar, spelling, style, and paraphrasing features as the browser extension, with a clean interface for reviewing suggestions and making edits. Useful for checking text on devices where extensions cannot be installed (mobile, restricted environments) or for one-off checks without extension overhead.","intents":["check text on devices or browsers where extensions cannot be installed","perform one-off grammar checks without installing browser extensions","access LanguageTool features on mobile devices or restricted environments"],"best_for":["users on mobile devices or tablets without extension support","one-time users who don't want to install extensions","organizations with restricted browser policies preventing extension installation","users checking text in environments where extensions are unavailable"],"limitations":["requires manual copy-paste workflow — not integrated into native text fields like browser extension","no real-time as-you-type detection — users must paste text and trigger checking manually","character limit unknown — may have different limits than browser extension (150,000 for premium)","no offline capability — requires active internet connection","mobile experience unknown — responsiveness and touch interface not documented"],"requires":["web browser with internet connection","access to languagetool.org domain (no firewall blocking)"],"input_types":["pasted text","typed text in web editor","file upload (if supported — not documented)"],"output_types":["inline error highlighting","suggestion tooltips","corrected text for download or copy"],"categories":["text-generation-language","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"languagetool__cap_7","uri":"capability://tool.use.integration.desktop.application.integration.for.native.text.editors.and.email.clients","name":"desktop application integration for native text editors and email clients","description":"Extends LanguageTool checking to native desktop applications including Microsoft Outlook, Word, Pages, Mail, Slack, Notes, and Messages on Windows and macOS. Integration mechanism unknown (likely system-level text input interception or native application plugins), but provides the same real-time detection and suggestions as the browser extension. Desktop integration enables checking in applications where browser extensions cannot operate.","intents":["check grammar in Microsoft Outlook emails and Word documents without switching to browser","get real-time suggestions in native macOS applications (Mail, Pages, Notes, Messages)","maintain consistent checking across desktop and web-based writing tools"],"best_for":["Windows users working primarily in Outlook and Microsoft Office","macOS users composing emails in Mail and editing in Pages","professionals who rarely use web-based email or document editors"],"limitations":["integration mechanism unknown — unclear how LanguageTool accesses text in native applications","supported applications limited to specific list (Outlook, Word, Pages, Mail, Slack, Notes, Messages); other applications not supported","performance impact on host applications unknown — no documentation on CPU/memory overhead","no offline capability — requires active internet connection for cloud-based suggestions","installation and configuration process unknown — may require system-level permissions or manual setup","conflict resolution with native spell-checkers unknown — behavior when both LanguageTool and native checker are active"],"requires":["Windows (for Outlook, Word, Notepad, WordPad) or macOS (for Pages, Mail, Slack, Word, Notes, Messages)","LanguageTool desktop application installation (specific versions unknown)","active internet connection for suggestion processing"],"input_types":["text in supported desktop applications","email composition in Outlook or Mail","document editing in Word or Pages"],"output_types":["inline error highlighting in native applications","suggestion tooltips","correction options in context menus"],"categories":["tool-use-integration","text-generation-language"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"languagetool__cap_8","uri":"capability://data.processing.analysis.writing.statistics.and.analytics.tracking","name":"writing statistics and analytics tracking","description":"Premium feature that tracks and displays writing metrics including word count, character count, reading time, sentence length distribution, and other analytics. Statistics are aggregated over time to show writing patterns and improvements. Available in premium tier only; free tier does not include analytics. Metrics are stored server-side and accessible via LanguageTool dashboard.","intents":["track writing productivity and volume over time","analyze reading difficulty and sentence complexity metrics","monitor writing improvements and consistency across documents"],"best_for":["writers and journalists tracking productivity metrics","content creators analyzing readability of their writing","teams monitoring writing quality and consistency across documents"],"limitations":["premium feature only — not available in free tier","specific metrics tracked unknown — documentation mentions 'statistics' but does not list all available metrics","no export functionality documented — statistics may be locked into LanguageTool dashboard","no comparison or benchmarking against other users or industry standards","privacy implications unknown — unclear what data is retained and for how long"],"requires":["LanguageTool premium subscription","active internet connection for statistics tracking and retrieval"],"input_types":["text checked through LanguageTool (browser extension, desktop app, or web editor)"],"output_types":["word count, character count, reading time metrics","sentence length and complexity statistics","time-series analytics dashboard","writing pattern reports"],"categories":["data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"languagetool__cap_9","uri":"capability://tool.use.integration.browser.extension.content.script.injection.with.dom.aware.text.field.detection","name":"browser extension content script injection with dom-aware text field detection","description":"Deploys content scripts into web pages that identify and monitor all text input fields (textarea, contenteditable divs, input[type=text]) and apply grammar/spelling checking in real-time as users type. The extension uses DOM mutation observers to detect new text fields dynamically added to pages and applies checking to them. Content scripts operate in the extension's isolated context to avoid conflicts with page scripts, with claimed zero-storage privacy model for text data.","intents":["enable grammar checking in any web-based text field without page-specific configuration","support dynamically-loaded text editors (like Gmail's compose interface or Slack's message input)","maintain privacy by processing text locally without storing it"],"best_for":["users who want transparent grammar checking across all web applications","privacy-conscious users who prefer local processing over cloud storage","web developers integrating LanguageTool into web applications"],"limitations":["cannot access password fields or encrypted text inputs due to browser security restrictions","does not work in sandboxed iframes or cross-origin contexts due to same-origin policy","content script injection may conflict with other extensions that modify the same DOM","performance impact on pages with many text fields unknown — no benchmarks provided","text processing architecture unknown — unclear whether suggestions are generated locally or sent to cloud servers despite privacy claims"],"requires":["Chrome, Firefox, Edge, Safari, Opera, or Yandex browser (specific versions unknown)","content script permissions granted during extension installation","active internet connection (for cloud-based suggestion processing, if applicable)"],"input_types":["text input in textarea elements","text input in contenteditable divs","text input in input[type=text] fields"],"output_types":["inline error markers (underlines/highlights)","suggestion popups","error categories and correction options"],"categories":["tool-use-integration","text-generation-language"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"languagetool__headline","uri":"capability://tool.use.integration.ai.powered.grammar.and.style.checker.extension","name":"ai-powered grammar and style checker extension","description":"LanguageTool is an open-source browser extension that enhances writing by providing real-time grammar and style checking across 30+ languages, making it ideal for users looking to improve their text clarity and correctness.","intents":["best grammar checker extension","grammar checker for writing improvement","top style checker for browsers","AI grammar tool for online writing","free grammar checker for multiple languages"],"best_for":["students","professionals","content creators"],"limitations":["does not store text for context-aware suggestions"],"requires":["supported web browsers"],"input_types":["text input in web forms"],"output_types":["grammar and style suggestions"],"categories":["tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0}],"trust":{"score":59,"verified":false,"data_access_risk":"high","permissions":["Chrome, Firefox, Edge, Safari, Opera, or Yandex browser (specific versions unknown)","active internet connection for cloud-based suggestion processing","text input field accessible to browser extension content scripts (not sandboxed iframes)","LanguageTool premium subscription","active internet connection for cloud AI inference","text selection capability in supported application (browser, desktop app, or web editor)","server infrastructure (on-premise or cloud VM) to host LanguageTool server","Java runtime (likely — based on typical LanguageTool architecture, but not confirmed)","network connectivity between client applications and self-hosted server","operational expertise to deploy, configure, and maintain the server"],"failure_modes":["does not work in password fields or encrypted text inputs due to browser security restrictions","character limit of 150,000 per text field may cause performance degradation on very large documents","cannot detect context-dependent errors that require semantic understanding beyond rule-based patterns","free tier limited to basic grammar/spelling checks; 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