How to Use Grammarly to Fix Your English Writing Everywhere
A practical guide to the tool that sits quietly behind every word you type in English — with the fact you need from day one: it doesn't understand anything but English.
Beginner7 min read
What you'll be able to do by the end
- Know from the start that Grammarly is English-only, with no support for other languages and no sign of that changing soon
- The free plan genuinely covers grammar, spelling, punctuation, and tone detection across all its apps — not a crippled trial
- If you pay for Pro, subscribe annually ($12/month), not monthly ($30) — the gap between them is clearly inflated
- Set goals per document — a Slack message isn't a cover letter — because the tool can't tell the difference unless you tell it
- Treat its AI detector as a rough signal only, not proof, because it produces false results
Before you start
- You regularly write in English — emails, work documents, LinkedIn, or study
- A free account at grammarly.com is enough to start before any payment decision
Grammarly is a writing tool that works everywhere you write in English — Gmail, Google Docs, LinkedIn, Word, Slack, and nearly any text box in the browser. Through a browser extension, a desktop app, a mobile keyboard, and Word/Outlook add-ins, it isn’t a place you visit and paste into; it sits quietly behind every character you type and corrects in place.
It arrived before the AI wave by years and adapted instead of being replaced: the chat generates text from scratch, while Grammarly corrects text you already wrote the moment you write it. That distinction decides when to use it and when it adds nothing.
One thing worth knowing up front about how it fits your workflow: it works only in English. If your day-to-day writing is mostly in another language, this guide will tell you quickly that it isn’t for you.
The steps
The steps below start with installation and daily use, move to goal-setting and Pro features, and finish with the right payment decision and a note on privacy.
Steps
Step 1: Install it where you actually write
Go to `grammarly.com` and install the browser extension, the desktop app, the Word and Outlook add-ins if you use them, and the mobile keyboard if you type a lot from your phone. The idea is that you never open a separate site and paste text into it — it works inside Gmail, Google Docs, LinkedIn, Slack, and whatever writing box you already use.
Note: Writing from more than one device? Install it everywhere you type — its value is covering every writing surface, not just one.
Step 2: Write normally and let the underlines appear
No need to change how you write. Type as usual and underlines start appearing beneath problem words — grammar, spelling, punctuation, or tone. Click any suggestion to accept or dismiss it. The free plan covers all of this plus 100 AI prompts per month, and it genuinely covers most daily use rather than being a limited teaser.
Note: Tone detection specifically earns its keep in email — it flags when a message reads harsher or more casual than intended, before you send it and regret it.
Step 3: Adjust goals for each document separately
A cover letter and a quick Slack message don't deserve the same standard, and Grammarly won't know the difference unless you tell it. Set audience, formality, and intent for each document you write — this makes suggestions actually fit the context instead of pushing you toward neutral, safe text everywhere.
Note: Sometimes ignore it deliberately. Good writing sometimes breaks its rules on purpose, and it's designed to steer you toward the safest option, not the strongest.
Step 4: Use Pro features if you genuinely need them: rewrites and plagiarism detection
If a sentence is grammatically correct but clunky, Pro's rewrites reword it more cleanly. For academic writing, plagiarism detection compares your text against published sources. There's also an AI detector — treat it as a rough indicator only, since it produces false positives and sometimes flags entirely human writing as generated.
Note: The difference versus a chat like ChatGPT: Grammarly corrects text you already wrote; the chat generates or restructures text from scratch. Many professional writers use both together.
Step 5: Decide your plan rationally, and mind your text's privacy
If the free plan covers your needs, stay on it — it's genuinely designed to suffice. If you need Pro, subscribe annually ($12/month) rather than monthly ($30); the monthly price is clearly inflated compared with annual. For organisations, there's an Enterprise plan with custom pricing including a unified style guide and admin tools. And remember your text passes through Grammarly's servers for analysis — review the privacy settings, and consider disabling the extension on sensitive documents.
Note: Business and Enterprise plans enforce stricter data handling than the individual plan — if your texts are company-sensitive, this difference matters.
Common mistakes — and how to avoid them
MistakeUsing it to correct non-English writing and expecting results.
Do this insteadIt supports only English. For other languages, use ChatGPT or Claude with explicit instructions about the rules and style you want.
MistakeSubscribing to Pro monthly at $30 without noticing the alternative.
Do this insteadSubscribe annually at $12/month instead — same features, and the difference is large and obvious.
MistakeAccepting every suggestion automatically without thinking.
Do this insteadReview each suggestion. The tool is built to push toward neutral, safe prose, and good writing sometimes breaks its rules deliberately.
MistakeTrusting the AI detector as conclusive proof a given text was AI-written.
Do this insteadTreat it as a rough signal only — it produces false results and sometimes flags fully human writing as machine-generated.
❓ Frequently asked questions
Does it work for languages other than English?
No. Grammarly supports English exclusively, and there's no sign that will change soon. If you write mainly in another language, Grammarly offers nothing — use ChatGPT or Claude with clear instructions about the rules and tone you want instead.
Is the free plan enough, or must I pay?
For most people, free is genuinely enough — it covers grammar, spelling, punctuation, and tone detection across all its apps with 100 AI prompts per month. You need Pro only for full-sentence rewrites, plagiarism detection, or a larger prompt allowance.
What's the difference between it and ChatGPT?
They solve different problems. Grammarly sits quietly inside every text box and corrects what you actually wrote, while ChatGPT is where you go to generate or restructure text from scratch. Many people who write in English daily use both — Grammarly for continuous background correction, the chat for heavier lifting.
Are my texts safe when I use it?
Your text passes through Grammarly's servers for analysis — that's part of how it works. Business and Enterprise plans enforce stricter data processing than the individual plan. Review the privacy settings, and consider disabling the extension on sensitive sites or documents.