Does LexiLint's grammar check work offline?

No. LexiLint's optional AI grammar check requires an internet connection and an API key. The extension sends the text directly to the AI provider you select. LexiLint's offline feature is spell checking.

Does offline spell checking send page text to a server?

No. LexiLint's spell-check dictionaries are bundled with the extension, and the spell check runs on your device without sending page text over the network.

What is BYOK grammar checking?

BYOK means Bring Your Own API Key. LexiLint uses the key you provide to send a grammar-check request directly from the extension to your selected provider. Gemini is available in the free LexiLint tier; Premium adds OpenAI and Anthropic support. Provider pricing and availability are controlled by each provider.

Offline Webpage Spell Checker for Chrome

Q: How do I spell-check a webpage offline in Chrome?

Install LexiLint, open a supported webpage, click the LexiLint toolbar icon, and select Check Spelling. The extension compares page text with dictionaries stored on your device, so the spell check does not require an internet connection.

Q: Can LexiLint check localhost and staging pages?

LexiLint is designed to check page text on live, staging, and localhost pages that Chrome allows the extension to access. Browser-protected pages and pages that block extension access may not be available.

Open a live, staging, or localhost page, click LexiLint, and run Check Spelling. The spell check uses dictionaries stored in the extension, so page text stays on your device. Optional AI grammar is separate: it requires internet access and your own provider key.

Add to Chrome — Free

Offline spell check | Live, staging, and localhost pages | Optional BYOK grammar

🤖 New: LexiLint for AI Assistants

Use LexiLint's spell and grammar checking directly in Claude Desktop, ChatGPT, Cursor, and other AI assistants via the Model Context Protocol (MCP).

Learn More About MCP View on npm

How Offline Spell Checking Works

Dictionaries Stored in the Extension

The free tier includes US and UK English variants. Premium adds Spanish, French, German, Polish, Russian, and Turkish. The selected dictionary runs on your device.

On-Demand Page Scan

Click Check Spelling to compare visible page text with the local dictionary. LexiLint highlights possible misspellings on the rendered page without uploading that text.

AI Grammar Is Optional and Online

Grammar checking is a separate BYOK feature. It requires an internet connection and sends selected page text directly to the provider configured by the user. Provider terms and charges apply.

Step-by-Step: Offline Spell Check in Chrome

Install LexiLint from the Chrome Web Store (free)
Open a supported live, staging, or localhost page
Click the LexiLint icon in the Chrome toolbar
Click Check Spelling — no internet connection is required
Review highlighted words and suggestions
Optionally configure a provider key for online AI grammar checking

What Works Offline?

Capability	Network required	Where page text is processed
LexiLint spell check	No	On your device
LexiLint AI grammar	Yes	Your selected AI provider
Custom dictionary	No	Your browser profile

Read the complete LexiLint privacy policy.

Frequently Asked Questions

How do I spell-check a webpage offline in Chrome?

Install LexiLint, open a supported page, click the toolbar icon, and select Check Spelling. The extension uses its local dictionary and does not need an internet connection for that operation.

Does AI grammar work offline?

No. Optional AI grammar requires an internet connection and an API key. LexiLint sends the selected text directly to the provider configured by the user.

Can LexiLint check localhost and staging pages?

LexiLint is designed for live, staging, and localhost pages that Chrome allows the extension to access. Browser-protected pages and pages that block extension access may not be available.

Which languages are available?

The free tier includes US and UK English variants. Premium adds Spanish, French, German, Polish, Russian, and Turkish.

Check a Supported Webpage Offline

Install LexiLint and run an on-device spell check on live, staging, or localhost pages that Chrome allows the extension to access. Optional AI grammar requires internet access and a provider key.

Add to Chrome — Free