Grammar Assistant

About

Grammar Assistant is a fully offline, real-time writing checker that works on every webpage you visit. As you type in any text field, a smart floating panel appears near your cursor listing every grammar error, spelling mistake, and style issue — with one-click fixes that apply directly to your text, without ever sending your words to any external server.

★ FLOATING FIX PANEL — WORKS ON ANY TEXT FIELD

Unlike other checkers that only work on specific sites, Grammar Assistant attaches to every editable field in your browser:
• Standard input fields and text areas
• Rich text editors (Gmail compose, Twitter/X, LinkedIn, Notion)
• Comment boxes, search fields, online forms

After ~1 second of typing, a compact panel appears just below the field listing all detected issues. No clicks needed to open it — it appears automatically and disappears when you move away.

★ ISSUE TYPES — THREE CATEGORIES

• Errors (red) — grammar mistakes, spelling errors, subject-verb agreement, wrong a/an, repeated words, missing spaces after punctuation
• Warnings (orange) — sentence capitalisation, their/there confusion, its/it's confusion, could/would of
• Style (blue) — wordy phrases, passive voice, filler words, nominalisations, redundancies like "very unique"

★ ONE-CLICK FIX PER ISSUE

Every issue in the panel shows the original text (struck through), the suggested correction (in green), and a reason. Click Fix on any individual issue to apply it directly into the field — the text updates instantly and the panel re-checks automatically.

★ FIX ALL

Click the Fix All button in the panel footer to apply every suggested
correction in one go. The panel re-runs immediately and confirms when no more issues remain.

★ SPELLING — 110+ COMMON MISSPELLINGS

The built-in spelling dictionary covers over 110 of the most frequently misspelled English words — including recieve→receive, mesage→message, seperate→separate, definately→definitely, occured→occurred, and many more.

Capitalisation is preserved when applying fixes.

★ QUICK CHECK PANEL (POPUP)

Paste or type any text into the Quick Check panel in the popup and click Check Text to get a full issue list outside the context of any webpage. Apply individual fixes or copy the fully corrected version in one click.

★ TONE REWRITER

Select a tone — Formal, Casual, Professional, Friendly, or Concise — and click Rewrite to transform your Quick Check text into that style. Use the result directly, copy it, or click Use as Input to chain multiple rewrites.

★ FLOATING ISSUE BADGE

A small badge in the bottom-right corner shows the total active issue count for the current field. Always visible at a glance, even when the panel is closed.

★ CONTEXT MENU INTEGRATION

Select any text on any webpage, right-click, and choose "Check grammar of selection" — Grammar Assistant opens the popup with that text pre-loaded in the Quick Check panel, ready to analyse.

★ KEYBOARD SHORTCUTS

• Alt+G — Toggle Grammar Assistant on/off on the current page
• Alt+Shift+G — Check the currently selected text


★ SETTINGS & CONTROLS

• Enable/disable checking per page with the toggle in the popup
• Individual toggles for spelling, grammar, and style checks independently
• Auto-check on focus — panel opens automatically when you click into a field
• Badge toggle — show or hide the floating issue count badge

★ 100% OFFLINE — COMPLETE PRIVACY
All grammar, spelling, and style checking is performed entirely on your device using a built-in rule engine. Your text is never sent to any server, never stored beyond the current session, and never shared with anyone.

No account, no API key, no internet connection required.

Write better. Fix faster. Install Grammar Assistant today.