Folio: PDF Reader & Editor

Folio is a fast, all-in-one PDF app: read any document for free, then unlock scanning, annotation, e-signatures, and a full toolbox of PDF editing tools with Folio Pro.

FREE PDF READER
• Smooth, high-performance rendering for huge files — even 1,000+ page documents
• Full-text search with highlighted results and instant page jumps
• Outline/bookmarks navigation, page thumbnails, and your own saved bookmarks
• Tap links inside the PDF to jump to pages or open the web
• Fit-width and fit-page zoom modes, with pinch-to-zoom on any page
• Text-to-speech read-aloud, so you can listen to any document
• Light, dark, and system theme; keep-screen-on while reading
• Open PDFs directly from other apps, email, or your files
• Password-protected PDF support

SCAN DOCUMENTS
• Turn your camera into a scanner — auto edge detection and cropping
• Import existing photos from your gallery as scanned pages
• Color, grayscale, black & white, and whiteboard filters
• Reorder, retake, or delete pages before saving
• Save as PDF or JPG, or append new pages to an existing PDF
• Optional OCR makes your scans searchable, with an invisible text layer under the image

ANNOTATE & SIGN
• Highlight, underline, and strike through text
• Draw freehand with a pen tool, in any color and stroke width
• Add sticky notes, text boxes, shapes, and stamps (like "Approved")
• Full undo/redo history while you mark up a page
• Create a signature by drawing it, typing it in a handwriting-style font, or capturing a photo of your signature
• Place your signature or initials anywhere on any document
• All annotations are written into the real PDF file, so they open correctly in any other PDF viewer

PDF TOOLS
• Organize: reorder, rotate, delete, duplicate, and insert pages
• Merge multiple PDFs into one, or split and extract pages
• Add page numbers, watermarks, and headers/footers
• Compress large PDFs to save space
• Fill in PDF forms and edit document metadata
• Set or remove a password on any PDF
• Batch-process multiple files at once

WHY FOLIO
• Reading is always free — no account, no watermark, no page limit
• A clean, modern interface built with the latest Android design guidelines
• No ads inside your documents
• Your files stay on your device — nothing is uploaded to a server

Upgrade to Folio Pro anytime to unlock scanning, annotation, signatures, and the full tools suite, with a monthly, yearly, or one-time lifetime purchase.