About Kompres PDF

Oversized PDF files create friction every single day: email attachments bounce, governmental portals and recruitment platforms reject uploads, job applications fail to submit, and mobile bandwidth is unnecessarily wasted.

Most traditional online PDF compression tools force users to upload confidential documents to external cloud servers, exposing sensitive contracts, tax records, resumes, and medical reports to third-party data risks.

Kompres PDF was created to solve this fundamental problem: providing fast, reliable, and generous file size reduction without ever compromising your privacy.

Kompres PDF leverages modern web technologies, specifically JavaScript and WebAssembly via proven open-source libraries including pdf-lib and pdfjs-dist.

When you select a document, your browser directly parses the internal PDF object tree, analyzes embedded raster images, downsamples excessive DPI resolution, and applies optimized stream compression entirely within your local device memory.

Because all computing happens on your machine's CPU and GPU, compression speeds are limited only by your device performance, and downloads are available instantaneously without waiting for network transfers.

Our technical architecture is strictly client-side. Our edge hosting provider (Cloudflare) serves the static HTML, CSS, and JavaScript assets needed to run the application.

No document byte is ever transmitted over the wire to our backend. Once you close your browser tab or clear the application, all working memory is immediately released.

There are no user accounts, no tracking profiles, no document databases, and no monetization of user documents.

Kompres PDF is independently developed, maintained, and operated by the Kompres PDF engineering team.

We are software engineers dedicated to high-performance web engineering, digital privacy rights, and building accessible utility software that respects the user.

The tool is free to use for individuals, students, professionals, and businesses worldwide with no mandatory registration or usage caps.

We actively maintain the platform and welcome your feedback, bug reports, and suggestions for improvements.

For general support inquiries, questions, or feedback, you can reach our team directly at: [email protected]

For privacy inquiries or technical support, please contact: [email protected] or visit our dedicated contact page.