Free & Secure Client-Side PDF Tools
Edit PDF without uploading. Compress, merge, encrypt, and redact PDFs directly in your browser. Your files never leave your device.
DuckPDF provides powerful browser-based PDF tools that work completely offline. No registration, no file uploads, no privacy concerns. Just fast, free PDF processing.
Client-Side PDF Tools
Compress PDF
Reduce PDF file size while maintaining quality. Compress PDF offline free.
Extract Pages
Select and extract specific pages from a PDF without uploading.
Combine PDFs
Secure PDF merger - combine multiple PDFs into one document.
Encrypt PDF
Browser based PDF encryptor - protect your PDF with a password.
Edit PDF
Edit PDF without uploading - modify text directly in browser.
Redact PDF
Permanently redact sensitive information from PDFs securely.
Rotate PDF
Rotate individual PDF pages in 90° increments. Fix sideways scans.
Convert to PDF
Convert images and Word documents to PDF. No upload required.
PDF to Markdown
Convert PDF files to Markdown format. No upload required.
Why Choose DuckPDF for Your PDF Needs?
100% Private & Secure
All PDF processing happens entirely in your browser using client-side JavaScript. Your files are never uploaded to any server. This makes DuckPDF perfect for handling confidential documents, legal papers, financial records, and sensitive personal information.
Works Offline
Install DuckPDF as a Progressive Web App and access all PDF tools without an internet connection. Compress PDF offline free, edit documents on a plane, or merge files in areas with no connectivity.
Free Forever
No subscriptions, no file limits, no watermarks, no hidden costs. Every feature is completely free to use. We believe PDF tools should be accessible to everyone without paywalls or premium tiers.
Fast Processing
By processing files locally, DuckPDF eliminates upload and download times. Your PDFs are processed instantly using modern browser APIs and WebAssembly technology for maximum performance.
How Client-Side PDF Processing Works
Unlike traditional online PDF tools that require you to upload your files to remote servers, DuckPDF uses advanced browser technologies to process everything locally on your device.
When you select a PDF file, it's read directly by your browser using the File API. The PDF is then processed using JavaScript libraries like pdf-lib and PDF.js, which run entirely within your browser's sandbox environment. The processed file is generated locally and downloaded directly to your device.
This approach means your sensitive documents—whether they're tax returns, medical records, legal contracts, or confidential business documents—never leave your computer. There's no server to be hacked, no data to be leaked, and no privacy policy to worry about.
Frequently Asked Questions
Are my PDF files uploaded to a server?
No. DuckPDF processes all files directly in your browser using client-side JavaScript. Your files never leave your device, ensuring complete privacy and security.
Is DuckPDF really free?
Yes, DuckPDF is 100% free with no hidden costs, no subscriptions, no file limits, and no watermarks. All features are available without payment.
Can I use DuckPDF offline?
Yes! DuckPDF works as a Progressive Web App (PWA). Install it from your browser and use all PDF tools offline without an internet connection.
Is it safe to edit sensitive documents with DuckPDF?
Absolutely. Since all processing happens locally in your browser and no data is transmitted to any server, DuckPDF is ideal for handling confidential documents, financial records, and sensitive information.
What browsers support DuckPDF?
DuckPDF works on all modern browsers including Chrome, Firefox, Safari, and Edge. For the best experience, we recommend using the latest version of your preferred browser.
