Absolutely. In the era of AI, many online tools upload your files to cloud servers, where they risk being scraped or used to train machine learning models. CedarPDF is different: we process everything 100% locally in your browser. Your files and signatures never leave your device, ensuring complete zero-knowledge privacy.

Yes! You can insert PNG, JPG, or WebP images of your signature. Our tool includes smart background removal that automatically removes light-colored backgrounds (white, light gray, light yellow) from scanned signatures, leaving only the signature lines. This is perfect if you have a scanned signature, company stamp, or official seal.

Our intelligent algorithm analyzes each pixel's brightness and color saturation. Pixels that are very bright (high luminance) and have low color saturation (close to gray) are identified as background and made transparent. This works perfectly for scanned signatures on white paper, photos of signatures on light backgrounds, and even slightly off-white or light yellow paper. The signature lines themselves are preserved because they have lower brightness or higher color saturation.

Yes! When you select a signature, you'll see a green Duplicate icon in the top-left corner. Click it to instantly create an identical copy of that signature, positioned slightly offset from the original. This is perfect when you need to sign multiple pages with the same signature, or when a document requires signatures in multiple locations. You can duplicate as many times as needed.

Absolutely. Unlike basic tools that suffer from coordinate drift, CedarPDF uses a unified coordinate system that maps your screen directly to the PDF's native points. This guarantees pixel-perfect placement and proportionally accurate resizing. Rotation angles also match perfectly — what you see in the preview is exactly what you get in the final PDF, regardless of where the signature is placed on the page.

Absolutely not. CedarPDF runs entirely in your browser using client-side technology. Your files are never uploaded to our servers or any third-party cloud. Everything happens locally on your computer, ensuring maximum security and privacy.

Yes! Before you click "Apply & Download," you can freely add, move, resize, rotate, duplicate, or delete signatures. Use the Undo button to revert the last action, the Delete icon to remove individual signatures, or Clear All to start over. Once you download the file, however, the signatures are permanently embedded.

Yes, it is truly free. There are no daily limits on the number of files, no page count and file size restrictions, and no watermarks added to your documents. You can sign as many PDFs as your device can handle, with all features including image insertion and smart background removal.

Yes, CedarPDF is web-based and works on any device with a modern browser, including Windows PCs, Macs, Linux, iPhone, iPads, and Android tablets. The drawing feature supports touch input for creating signatures directly on mobile devices. No software installation is required.