Folio: PDF Editor & Scanner

Folio is the all-in-one PDF editor, reader, and scanner for Android.

Edit text, sign contracts, fill forms, scan documents, and get

AI-powered summaries — all offline, no cloud, no file size limits.

⭐ TRUSTED BY STUDENTS, PROFESSIONALS & BUSINESSES WORLDWIDE

Whether you're signing a lease, annotating a textbook, filling a tax form,

or summarizing a 100-page report — Folio gets it done in seconds.

✏️ EDIT & SIGN PDF

- Edit text directly — cover and retype any text in matching style

- Draw and insert your signature — sign contracts instantly

- Fill PDF forms — type into any form field

- Add text annotations, sticky notes, and highlights

- Permanently redact sensitive information

📷 DOCUMENT SCANNER

- Scan any document with your camera — receipts, contracts, IDs

- Auto edge-detection with perspective correction

- Export as multi-page PDF instantly

- Color, grayscale, and black & white modes

✨ AI PDF ASSISTANT (Powered by Gemini)

- AI Summary — get a bullet-point summary of any PDF in seconds

- Ask PDF — ask any question, get instant answers from your document

- AI Translate — translate any PDF into any language

- AI Proofread — fix grammar and spelling errors throughout

- AI Edit Text — rewrite, simplify, or formalize document content

All AI runs on-device — your documents never leave your phone.

📖 BEST-IN-CLASS PDF READER

- Night, sepia, and day reading themes

- Text-to-speech — listen to any PDF hands-free

- Auto-scroll, pinch zoom, bookmarks, page jump

- Vertical scroll, page flip, and two-page spread modes

- Full-document search — find any word instantly

🔧 30+ PDF TOOLS

- Merge PDFs — combine multiple files into one

- Split PDF — extract any page range

- Compress PDF — shrink file size without quality loss

- Delete & Rearrange Pages — reorganize any document

- Lock / Unlock PDF — add or remove password protection

- PDF to Word — convert to editable .docx

- Word to PDF — convert .docx to PDF

- Image to PDF — convert JPG, PNG to PDF

- PDF to Image — save pages as JPG

- OCR — extract text from scanned documents

- Smart Extract — auto-detect emails, phone numbers, dates & addresses

- Add Watermark, Page Numbers, Bates Numbering

- Create Fillable PDF — build forms with fields and checkboxes

- Overlay Compare, Side-by-Side view, and more

🔐 PRIVATE & SECURE — 100% OFFLINE

Unlike most PDF apps, Folio never uploads your files.

Everything runs on your device — no account, no login, no cloud.

Perfect for sensitive documents: contracts, medical records, legal files.

💎 FREE TO USE — UPGRADE WHEN YOU NEED MORE

✅ Free: PDF reading, scanner, annotations, Image to PDF, rotate pages

🔧 Premium: All 30+ editing tools, no ads

✨ Premium + AI: Everything + all AI features — 3-day free trial

Download free — no account required.