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.

Recent changes:
- Bug fixes and performance improvements
- New Lock PDF: Replace original file option
- Premium tools: try before you buy