LexiLint
LexiLint is a Chrome extension that provides offline spelling and grammar checking for any webpage, including published sites, localhost, and staging environments. Unlike traditional grammar checkers, it requires no account, no monthly fees, and no data collection. The spell checker operates entirely offline using built-in US and UK English dictionaries, while the AI grammar checker leverages a bring-your-own-API-key (BYOK) model, supporting Google Gemini (free), OpenAI, and Anthropic Claude. This design ensures that text never passes through LexiLint's servers, giving users full control over their data. The extension highlights errors visually and offers one-click corrections. It supports custom dictionaries for technical terms and brand names, and provides deterministic results—the same page will always yield the same errors. LexiLint also integrates with AI assistants via the Model Context Protocol (MCP), allowing spell and grammar checks directly in tools like Claude Desktop and ChatGPT without consuming AI tokens for spelling. LexiLint is particularly useful for content creators, developers, and professionals who need to proofread live or pre-release web content. It fills a gap left by tools like Grammarly, which do not work on published pages or localhost. While it lacks real-time typing suggestions and does not function inside text input fields, its privacy-first, offline-capable approach makes it a compelling choice for final checks before publication.
- Category
- Chrome Extensions
- Pricing
- Unknown
Problem solved
LexiLint solves the problem of privacy-invasive, subscription-based grammar checkers that require accounts and send user text to external servers. It enables offline, account-free spelling and grammar correction on any webpage, including staging and localhost, without tracking or data collection.
Use cases
- Proofreading published blog posts and articles
- Checking spelling and grammar on staging/localhost sites before launch
- Verifying AI-generated content for errors
- Pre-screening text before sending to AI assistants to save tokens
- Ensuring professional documentation and client-facing pages are error-free
- Adding custom technical terms to a personal dictionary for consistent checks
Audience
- Developers
- Content Creators
- Business Users
- Hobbyists
Pros
- 100% offline spell checking
- Bring Your Own API Key for AI grammar
- No data collection or tracking
- Works on any webpage including localhost and staging sites
- Multi-provider AI support (Gemini, OpenAI, Claude)
Cons
- Does not check text while typing in input fields
- No real-time suggestions
- Manual check required (click to scan)
- Premium required for non-English languages and additional AI providers
- Only available as a Chrome extension
Official website: https://igniteapp.net/lexilint
Canonical LambdaBase page: https://www.lambdabase.com/tools/lexilint