JianBox - Local Document Tool
Scan, sign, lock. No subs.
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
All-in-one office toolkit with 12 tools. 100% offline processing, zero cloud upload. Includes document scanner, PDF editor, file unarchiver, and private vault.
JianBox = Document Scanner + PDF Editor + File Unarchiver + Private Vault, all in one.
100% Local Processing. Your files never leave your device.
One app, twelve capabilities, zero cloud uploads, zero account login required. Scan documents, convert formats, edit PDFs, extract archives, free up storage, encrypt files—everything happens offline on your iPhone and iPad.
Documents & Scanning
【Camera Scanner】
Snap photos or import from album. Auto edge detection, enhancement, multi-page scanning, export as PDF. Contracts, receipts, notes, IDs—turn them into high-quality PDFs instantly.
【Image to PDF】
Select multiple images and merge them into a single PDF. Custom page sizes (A4/Letter), watermark support. Fully offline.
【PDF Editor】
Reorder, rotate, delete, or extract PDF pages with simple drag-and-drop gestures.
【PDF Verifier】
Professional PDF inspection tool: page consistency check, blank page detection, metadata viewer, SHA-256 hash verification. Auto-generates verification reports for compliance scenarios.
【Signature Tool】
Place personal signatures or company stamps on PDFs. Drag-and-drop positioning, resize, rotate, batch signing across multiple files. Final step for contract approval and formal delivery.
Files & Compression
【HEIC Converter】
Batch convert iPhone HEIC/HEIF photos to universal JPG format. Adjustable quality and dimensions, text or image watermark support. Solves the "Windows can't open iPhone photos" problem.
【Unarchiver】
Extract ZIP, RAR, 7Z, TAR, GZIP, BZIP2, XZ. Also create password-protected ZIP archives from multiple files. Open compressed attachments directly without a computer.
【Batch Renamer】
Rename files or photos with prefix, suffix, numbering, find-replace, timestamps. Preview before applying, undo support.
【Storage Cleaner】
Scan large files, duplicate photos, and app caches. Free up space with one tap.
Media Processing
【Video & Audio Toolkit】
Convert formats, compress files, trim videos, extract audio tracks. All processing happens locally with zero data usage.
Privacy & Security
【Private Vault】
Encrypt and store sensitive files and photos. Face ID / Touch ID locked. Bank-level encryption protects your data even if your phone is lost.
Productivity Tools
【Clipboard History】
Automatically saves copied text. Pin important items, search history, categorize. Never lose a copied verification code or address again.
【QR Scanner & Generator】
Scan QR codes and barcodes, or generate custom QR codes. History auto-saved for easy reference.
Key Features
• 100% Offline — Files stay on your device, never uploaded
• 12-in-1 Toolkit — Replace 12 separate apps, save storage
• Ad-Free Experience — Clean, distraction-free interface
• iPad Optimized — Full-screen support, split-view ready
• Multi-Language — English, Chinese, Japanese, Korean
Privacy & Security
JianBox respects your privacy. All file processing occurs entirely on your device. We do not collect, upload, or store any of your file contents. The Private Vault uses device-level encryption.
No account sign-up required. No usage tracking. No marketing notifications.
Pro Version
One-time purchase. iPhone + iPad universal. Lifetime access to all 12 tools, ad-free experience. No subscription, no recurring fees, no account binding. Future updates included forever.
Questions or feedback? Contact us through the in-app support feature.
Ratings & Reviews
New Features
New PDF Convert: shrink a PDF (Light / Balanced / Maximum - smaller file at higher settings), export every page as an image (share as a ZIP or save straight to Photos), or run text recognition on scans to produce a searchable PDF whose text can be selected and copied
New My Files: every file produced by the tools in one place, with search by name, share, Save to Files and delete - no more hunting around your phone
New Local Cleaner: one tap scans for clearable caches, duplicate files (compared byte for byte by content) and large files, shows how much space you can reclaim, and lets you choose what to clean
Easier scanning: page edges are detected and cropped automatically after capture, or re-detect with the Auto Detect button; optionally run text recognition when exporting to create a searchable PDF, and add page numbers (either 1 / 2 / 3 or 一 / 二 / 三 style)
More capable PDF building and editing: add page numbers when building a PDF from images; insert another PDF or merge several PDFs into one while editing; edit password-protected PDFs after entering the password
Adjustable stamp strength: fine-tune the opacity when placing a signature or seal, and password-protected PDFs can be stamped after entering the password
Preview before extracting: browse an archive's file list and sizes before you extract
Cancellable long jobs: video compression, muting, audio extraction and audio transcoding can now be cancelled at any time
Changes
The app is now completely free: all in-app purchases, the paywall, the trial period and output watermarks are gone - every tool is unlocked out of the box. The membership and "Restore Purchase" entries are removed from Settings
The vault is now truly encrypted: files are stored encrypted, temporary plaintext copies are wiped on lock or when the app moves to the background, and deletions are overwritten. The PIN is now stored as an irreversible hash instead of plaintext
The home screen gains entries for PDF Editing, PDF Convert, My Files and Local Cleaner; files produced by the tools are registered centrally, and previously generated files are picked up automatically
Fixed
Fixed password-protected PDFs being rejected outright in editing and stamping; entering the password now works
Fixed the vault PIN being kept in plaintext - it is now hashed, with automatic upgrade for an existing PIN
Fixed some tool output not appearing in the file records
All file processing happens entirely on your device. Files are never uploaded.
The developer, 涛 刘, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 涛 刘
- Size
- 31.8 MB
- Category
- Productivity
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Simplified Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- JianBox Pro lifetime unlock $0.00
- Copyright
- Copyright © 2026 PrismTao. All rights reserved.

