CleverGhost - AI-Powered PDF Toolkit for macOS

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Built for the AI Era

Powered by Apple's FoundationModels API, CleverGhost brings powerful on-device intelligence to your documents—completely private and offline.

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AI Chat

Ask questions about your documents. Get instant, context-aware answers powered by on-device AI. Works offline.

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Grammar Check

Advanced grammar analysis with structured output. Select specific pages (1-5, 1,3,5) and get detailed corrections with explanations.

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Multi-Document Intelligence

Compare and synthesize information across multiple research papers. Cross-reference sources automatically.

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BibTeX Extraction

AI-powered citation extraction with DOI/arXiv lookup. Hybrid mode combines AI intelligence with online verification.

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Cover Letter Generator

Generate professional academic cover letters for journal submissions. AI reads your abstract and creates tailored letters.

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Smart Finder

Intelligent semantic search across your documents. Find concepts, not just keywords. Understands context.

🔒 100% Private: All AI processing happens on your Mac using Apple's FoundationModels. Your documents never leave your device.

✨ NEW FEATURE

Your downloads,
automatically organized.

CleverGhost transforms your chaotic downloads folder into a **Smart Folder**. Using local AI, it categorizes your documents and identifies duplicates with industrial-grade precision.

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AI Auto-Categorization

Instantly sorts documents into meaningful categories: Financial, Medical, Academic, Legal, and more.

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4-Tier Duplicate Detection

The most comprehensive duplicate detection pipeline available for macOS:

Level 1

RAG Semantic Match

Content meaning

Level 2

Hash Match

Byte-for-byte

Level 3

Content Fingerprint

Normalized text

Level 4

Title Similarity

Fuzzy matching

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Privacy First: Analysis happens 100% on your device. No cloud indexing.

Three Powerful Workflows

Whether you're a researcher, student, or professional, CleverGhost adapts to your workflow.

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🤖 AI Assistance Workflow

For researchers and students analyzing documents

💬 Chat with Your PDFs

1. Drop your research paper or textbook into CleverGhost
2. Ask questions in natural language: "What are the key findings?"
3. Get instant, context-aware answers with citations
4. Compare multiple papers simultaneously with Multi-Doc Intelligence

✍️ Grammar & Writing

1. Select pages to check (e.g., "1-5" or "1,3,5")
2. AI analyzes grammar (Specialized in Academic English US/UK)
3. Detects subject-verb agreement, punctuation, and merged words
4. Advanced extraction supports international document encodings

📚 Multi-Document Research

Drop multiple research papers and ask CleverGhost to synthesize findings across all documents. The AI identifies contributions from each paper and provides a comprehensive analysis with source attribution and contribution tracking.

✓ Cross-paper comparison ✓ Source tracking ✓ Synthesis

Perfect for: Literature reviews, thesis research, studying, fact-checking, academic writing

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📖 Research & Citation Workflow

For academics building bibliographies

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AI Extraction

Drop PDFs and let AI extract bibliographic metadata automatically. Works with DOI and arXiv IDs.

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Hybrid Verification

Combine AI extraction with CrossRef/arXiv online lookup for maximum accuracy and completeness.

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BibTeX Formatting

Clean, normalize, and format citations. Support for APA, MLA, Chicago, Harvard, IEEE styles.

Step-by-Step Process:

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Drag & Drop PDFs

Select multiple research papers

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Choose Extraction Mode

Hybrid, Online, or Offline

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AI Extracts Metadata

Author, title, journal, year, DOI

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Export BibTeX

Ready for LaTeX, Overleaf, Zotero

📝 Smart Renaming

Automatically rename files using extracted metadata: Smith_2024_DeepLearning.pdf

✉️ Cover Letters

Generate professional journal submission letters. AI reads your abstract and creates tailored content.

Perfect for: Building bibliographies, managing citations, academic publishing, literature organization

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🛠️ PDF Power Tools Workflow

For professionals managing documents

🗜️ Compression

Basic Mode

One-click presets: Screen, eBook, Printer, Prepress

Pro Mode

Custom DPI, image quality, color management, font optimization

📄 Page Management

Merge & Split

Combine multiple PDFs or extract specific pages

Rotate & Reorder

Drag-and-drop page manipulation

Security & Encryption

🔐 Password Protection

🔓 Unlock PDFs

💧 Watermarks

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PDF Repair

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Rasterize Pages

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Resize to A4

Perfect for: Document preparation, file optimization, security, batch processing

Under the Hood

Built with cutting-edge technology

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Apple FoundationModels

Leverages macOS 26.0 (Tahoe) on-device AI with structured output using @Generable structs. Temperature control, automatic retry logic, and smart context window management.

✓ Zero network calls
✓ Automatic text chunking
✓ Session pre-warming for speed

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Ghostscript Engine

Industry-standard PDF processing with precise DPI control, superior compression ratios, and advanced features.

✓ Professional compression
✓ Multi-encoding support
✓ Batch processing

Requirements: macOS 13.0+ for basic features • macOS 26.0+ (Tahoe) for AI • brew install ghostscript

Privacy is not a feature.
It's a foundation.

CleverGhost was built from the ground up to respect your data. Your research, documents, and conversations never leave your Mac.

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On-Device AI

All processing is done locally using Apple Intelligence.

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No Data Collection

We don't track your usage or collect any personal information.

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Open Source Transparency

Our code is open for anyone to audit and verify.

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Open Source & Secure

CleverGhost is licensed under the AGPLv3 license. It uses Ghostscript for professional PDF processing, ensuring both power and transparency.

View AGPLv3 License Ghostscript Licensing

Need help?

Whether you've found a bug, have a feature request, or just need guidance, the CleverGhost community is here to help.

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Report an Issue

Found a bug or something isn't working as expected? Let us know on GitHub.

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Community Support

Join the discussion, ask questions, and share your ideas with other users.

Ready to supercharge your PDF workflow?

Free, open source, and built for privacy.

Download on the Mac App Store