Resize your PDF documents quickly and easily. Change page dimensions, scale content, and optimize your PDFs while maintaining quality. Perfect for adapting documents to different paper sizes or digital requirements. No Signup Required.
Transform your PDF documents with precision
The concept of standardized paper sizes dates back to 1786 when German scientist Georg Christoph Lichtenberg proposed a system with a fixed aspect ratio—a concept later formalized in the ISO 216 standard (A4, etc.) in 1922. Before digital resizing, architects and engineers used specialized scaling tools called pantographs, invented in 1603, to resize technical drawings. Interestingly, NASA faced a critical document resizing challenge during the Apollo missions, as lunar module documentation needed to be reduced to save weight—each pound of paper cost approximately $50,000 to transport to space. Today, studies show that improper PDF sizing is responsible for approximately 12% of all printing errors in professional environments, costing businesses an estimated $300 million annually in wasted materials.
PDF resizing involves complex transformations of the document's internal coordinate system. Unlike image resizing, which simply resamples pixels, PDF resizing must handle multiple content types simultaneously. The process applies affine transformations to vector graphics, text, and form elements while carefully resampling raster images to maintain quality. Modern browser-based PDF resizers leverage WebAssembly to achieve near-native performance when calculating these transformations. The most sophisticated implementations use content-aware scaling algorithms that analyze document structure to intelligently preserve critical elements like tables and diagrams. This approach prevents distortion of important content while still achieving the desired dimensions—a technique that requires balancing matrix transformations with selective content preservation.
PDF resizing allows you to change the page dimensions or scale the content of your PDF documents. You might need this when printing documents on different paper sizes, preparing files for professional printing, or reducing file size while maintaining readability. Common uses include converting between paper standards (like A4 to US Letter) or optimizing PDFs for digital distribution.
Our PDF resizer uses advanced algorithms to preserve the quality of text, images, and vector graphics during resizing. The tool maintains the original resolution of embedded images and ensures text remains crisp and readable. For vector content, the scaling is performed mathematically to prevent any loss of quality regardless of the size change.
Our tool supports all standard paper sizes including A4, US Letter, Legal, A3, and custom dimensions. You can input PDFs of any page size and convert them to your desired dimensions. The tool also allows percentage-based scaling to precisely adjust content size while maintaining aspect ratios.
Yes, you can upload PDF files up to 50MB in size. This limit accommodates most common PDF documents. For larger files, we recommend splitting them into smaller parts or using our PDF compression tool first to reduce the file size while maintaining quality.
Yes, your privacy and security are our top priority. Our PDF resizer operates entirely within your browser using client-side JavaScript. Your documents are never uploaded to our servers or stored anywhere outside your device, ensuring complete confidentiality of your sensitive documents.
Our resizer preserves interactive elements such as form fields, hyperlinks, and bookmarks during the resizing process. These elements are properly scaled along with the document content to maintain their functionality and relative positioning in the resized PDF.
Our PDF resizer works on all modern web browsers including Chrome, Firefox, Safari, and Edge. The tool is fully responsive and can be used on desktop computers, laptops, tablets, and mobile devices. For optimal performance, we recommend using an up-to-date browser version.