Folio is a Chrome extension for the PDFs you actually work with. Edit existing PDFs: click any line, retype it, and it saves itself, no converting to Word and back. Design new ones: start from templates (invoice, letter, receipt, agreement), drag in fields, tables and QR codes, apply your brand in one click, and let Checks fix layout problems. AI built in: Chrome's on-device model, or bring your own key (Claude, Gemini, OpenAI).