Lifetime Launch Deal 10$ for a limited time

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AI Writing & Reading
Assistant for You

Highlight any text to summarize what you read, fix what you write, rephrase sentences, or translate instantly. No tab switching, no copy-paste.

  • No account needed to start
  • 10 free uses per day
  • Free to try
Chrome logoInstall Free Extension

Loved by people who hate writing emails

ContextPen preview
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Use AI on Any Site, Instantly

Reddit
Gmail
Outlook
WhatsApp
X
LinkedIn
Facebook
Medium

Stop wasting time switching tabs

Gmail

Reply to emails faster

Reddit

Summarize reading everywhere

LinkedIn

Write professional LinkedIn replies

WhatsApp

Reply faster on WhatsApp

X

Translate faster on X

Outlook

Reply faster in Outlook

All Supported Languages

US English
UK English
German
French
Spanish
Italian
Portuguese
Dutch
Polish
Swedish
Norwegian
Turkish
Russian
Arabic
Belgium
Philippines

Simple Pricing

Start free, upgrade for stronger reasoning, or bring your own keys for lifetime access.

Free

$0

Starter

Try ContextPen with fast everyday models.

Flash LiteHaiku 4.54.o mini
Advanced model access✕
Regular AI responses10 / day
Advanced AI responses✕
Response qualityGood
Reasoning tasksBasic
Priority support✕
Price increases✕
Data privacyStandard
Early access✕
One-time payment✕
Bring your own API keys✕
Personalized AI✕
Best forTrying it
Get Started

Pro

$9

/ month

Popular

Best hosted plan for stronger reasoning tasks.

GPT 5.4Gemini ProSonnet 4.6
Flash LiteHaiku 4.54.o mini
Advanced model access✓
Regular AI responsesUnlimited?
Advanced AI responses500 / month
Response qualityBest
Reasoning tasksStrong
Priority support✓
Price increasesAffected
Data privacyVia our servers
Early access✕
One-time payment✕
Bring your own API keys✕
Personalized AI✕
Best forDaily work
Upgrade to Pro

Lifetime

$10

one-time

Recommended

Bring your own keys and keep unlimited control.

OpenAIGeminiClaude
Advanced model access✓
Regular AI responsesUnlimited
Advanced AI responsesUnlimited
Response qualityBest
Reasoning tasksStrong
Priority support✓
Price increasesLocked in forever
Data privacyDirect to AI — private
Early access✓
One-time payment✓
Bring your own API keys✓
Personalized AI✓
Best forPower users
Get Lifetime

Privacy

Private by default.
Secure where it matters.

ContextPen is built to keep your writing and reading flow confidential, protected, and out of places it does not belong.

Third parties

Not shared

Your content is not sold or passed around to outside vendors.

AI training

Opted out

Your inputs are not used to train future AI models.

API keys

Stored locally

Your provider keys stay in your browser and are never stored on ContextPen servers.

Testimonials

Loved by people who use it every day

Ethan R.

Ethan R.

ContextPen saves me from rewriting the same email three times before hitting send.

Danielle K.

Danielle K.

The grammar fixes are fast, but the real win is how natural the rewrites feel.

Mason T.

Mason T.

I use it while reading articles all day. Summaries are instant and actually useful.

Chris A.

Chris A.

It feels like having a writing assistant inside every website instead of another app.

Sophie L.

Sophie L.

Translations and rephrasing are so quick that I barely notice the workflow anymore.

Nora P.

Nora P.

Probably the first extension I keep using every day because it removes real friction.

FAQ

Questions, answered

ContextPen is a Chrome extension that lets you select any text on any website and instantly fix grammar, rephrase, summarize, translate, and more without leaving the page or switching tabs.
Yes. The free plan gives you 10 AI actions per day with no account required. Just install and start using.
A one-time $9 payment that gives you lifetime access. You bring your own API keys from OpenAI, Anthropic, or Google, so there are no monthly fees from us.
Instead of paying us monthly, you get API keys directly from OpenAI, Anthropic, or Google and paste them into ContextPen. You only pay your real usage costs with those providers.
On the Lifetime BYOK plan, your text goes directly from your browser to the AI provider. On Free and Pro, requests are routed through our servers, but we do not store, sell, or train on your data.
No. Your API keys are stored locally in your browser and never sent to our servers.
Yes. Gmail, LinkedIn, X, Reddit, Medium, Notion, Google Docs, Outlook, and any site where you can select text.
Grammarly focuses on correcting writing. ContextPen also summarizes what you read, explains text, translates, and gives you multiple AI model choices across any site.
Yes. $9 is the launch price. Early users lock in that price forever, and the price will increase as more features are added.
You lose access to advanced models and unlimited responses, but your free plan remains active.
Free includes regular fast models. Pro adds advanced hosted models like GPT, Gemini Pro, and Claude Sonnet. Lifetime BYOK works with your own OpenAI, Anthropic, or Google models.
Not for the free plan. For Pro and Lifetime, you need an account to manage your subscription or license.