PDF Signer & Form Filler

Lan Signer now has a more intuitive onboarding. You can easily understand main functionalities and start using it! We have also delivered several improvements in the process of signing PDF files and filling out PDF forms. Autofill interactive PDFs, summarize files with on device AI, and sign any PDF file with our privacy first solution.

PDF Signer & Form Filler (Lan Signer) is the ultimate privacy-first app for signing, filling, and summarizing PDF documents—entirely on your device. With on-device AI, Lan Signer transforms how you handle contracts, agreements, forms, and legal documents. SIGN PDFS INSTANTLY PDF Signature : Lan Signer makes signing documents effortless. Draw your signature with your finger or Apple Pencil, save it for reuse, and place it anywhere on your PDF file. Sign contracts, NDAs, invoices, and receipts in seconds—no internet required. Sign documents offline, anytime, anywhere. Whether you're traveling or without connectivity, Lan Signer works perfectly offline. Your business documents stay private, always. AUTOFILL PDF FORMS Tired of typing the same information repeatedly? PDF Signature : Lan Signer detects form fields automatically in interactive PDFs and fills them instantly with your saved details. Name, email, phone, address—autofill everything in one tap. You can always make manual placements as well. Smart PDF autofill recognizes first name, last name, street address, city, state, ZIP code, and country. Fill legal forms, business agreements, and contracts faster than ever. SUMMARIZE WITH ON-DEVICE AI Sign, fill, summarize with AI—all without leaving the app. Lan Signer uses on device Apple foundation models to generate instant summaries of your documents. Long contracts, complex agreements, detailed invoices—get the key points in seconds. Privacy-first PDF signing means your document content never leaves your device. Summarize with on-device AI ensures zero cloud uploads, zero tracking, and complete confidentiality. EXPORT SIGNED PDFS Once you've completed your document, export signed PDF files with a single tap. Share via email, save to Files, or send through any app. Your signed contracts, forms, and agreements are ready for immediate delivery. Fill, sign, export in seconds. PDF Signature : Lan Signer streamlines your entire workflow with professional results every time. PRIVACY-FIRST DESIGN PDF Signature : Lan Signer prioritizes your privacy above all else. Everything stays private on your device. No cloud uploads, no tracking, no data collection. Your documents, signatures, and personal information remain completely offline and secure. Optional iCloud backups give you control. Enable backups when you want, disable them when you don't. OFFLINE PDF SIGNER Work without internet. Sign, fill, summarize with AI—all offline. Perfect for travelers, remote workers, and anyone who values privacy and reliability. Lan Signer is a complete offline PDF signer that never requires connectivity. PDF SIGNATURE MADE EASY PDF Signature : Lan Signer is designed for simplicity. Import a document, autofill forms instantly, add your signature, and export—done. PERFECT FOR Freelancers signing contracts and agreements. Business professionals handling invoices and receipts. Tenants signing lease agreements. Parents completing school forms. Legal professionals managing NDAs and legal documents. Anyone who values document privacy and offline access. KEY FEATURES Sign documents offline with finger or Apple Pencil. Autofill forms with smart field detection in interactive PDFs. Summarize documents using on-device AI. Export signed PDFs instantly. Save multiple signatures for reuse. Detect and fill name, email, phone, address fields automatically. Works 100 percent offline—no internet required. Privacy-first: zero cloud uploads, zero tracking. Optional iCloud backups you control. Support for contracts, agreements, invoices, receipts, NDAs, forms. PRIVACY FIRST Lan Signer is built for users who demand privacy. All processing happens on your device. Your PDFs, signatures, and personal information never touch the cloud unless you explicitly enable iCloud backups. Sign, fill, summarize with AI, all privately, securely, and offline. PDF Signature : Lan Signer offers the fastest, most private way to handle your documents.