Wandpen
Chrome extension AI writing assistant with free on-device grammar/rewrite tools plus paid cloud models and a lifetime BYOK option.
What it does
Wandpen is a Chrome extension that adds an AI assistant to any website for fixing grammar, rewriting text, translating, summarizing pages, and chatting with page content. It runs unlimited local writing via on-device Gemini Nano for free, with paid plans unlocking cloud models like GPT and Claude, and a one-time 'bring your own API key' lifetime option.
How to use: Install the Wandpen Chrome extension. It works anywhere you write online. Select the text you want to improve, and Wandpen will provide suggestions for grammar, tone, and style.
Core features
Works on any website via a hotkey-activated popup
Free unlimited on-device writing and voice-to-text using Gemini Nano
Page chat for summarizing or rewriting the content of a webpage
Custom, savable prompts organized into folders
Access to multiple cloud models (GPT, Claude, Gemini) on paid plans
Bring-your-own-API-key option for a one-time lifetime license
Best for
→Writers wanting quick grammar and rewrite help across any website
→Users needing private, offline AI writing without a subscription
→Developers who prefer using their own API keys over a monthly plan
→Professionals wanting voice-to-text transcription while browsing
Pricing
Free
Pro
$10/month
BYOK Lifetime
$19
Toolspool rankingby monthly traffic
Tutorials
Step-by-step: exactly how to get things done with it.