Pencilo — AI Writing Assistant | Grammar, Rewrite & Translate

Fix grammar, rewrite in 11 tones, summarize, and translate to 20+ languages — all inline, right where you write.

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.