Pencilo — AI Writing Assistant | Grammar, Rewrite & Translate

Pencilo — Your AI Writing Assistant for Every Tab
Write better, everywhere. Pencilo fixes grammar, rewrites text, summarizes content, and translates — all inline, without leaving the page.

Fix Grammar
Select any text and get instant grammar and spelling corrections applied directly in place. No copy-pasting needed.

Rewrite in 11 Tones
Rephrase your text to match the right voice:
Neutral · Friendly · Professional · Concise · Funny · Polite · Empathetic · Persuasive · Confident · Assertive · Direct

Summarize
Condense long text into clear, concise summaries in one click.

Translate to 30+ Languages
Translate selected text into English, Spanish, French, German, Italian, Portuguese, Chinese, Japanese, Korean, Russian, Arabic, Hindi, Turkish, Dutch, Swedish, Polish, Greek, Czech, Hungarian, Serbian, Croatian, Bulgarian,
Romanian, Ukrainian, Finnish, Danish, Norwegian, Latvian, Lithuanian, Slovak, and more.

Inline Widget
Select text on any page and a floating Pencilo icon appears instantly. Click it to fix grammar, rewrite, summarize, or translate — right where you are. Can be toggled on or off in settings.

Customize Your Writing
Control output length (shorter, same, or longer), add custom instructions to match your writing style, and pin up to 3 favorite languages for quick access.

Works Right Where You Write
Pencilo detects editable fields — Gmail, LinkedIn, Notion, Google Docs, Slack, and thousands more — and replaces text inline. No switching tabs, no popups to manage.

Undo & Redo
Changed your mind? Instantly undo or redo any edit inside the Pencilo popup.

Free to Start, Pro to Unlock
All core features are free. Upgrade to Pro ($49.99/year) for 20× more usage.

Privacy-First
Pencilo processes your text securely via API. Your data is never stored or used for training.