About
About PrivaPDF
PrivaPDF is a browser-based PDF converter and toolkit. Every conversion, merge, compression, and signature happens entirely on your device. No file ever leaves your browser. The mission is straightforward: give people professional-grade PDF tools without forcing them to surrender their documents to a remote server.
Why we built this
Most online PDF converters require you to upload your document to a remote server. That means your tax returns, medical records, legal contracts, and internal business reports are transmitted to — and temporarily stored on — infrastructure you do not control. Some services retain files for hours or days. Others use uploaded documents to train machine-learning models. Even those that delete files immediately still expose your data in transit.
We built PrivaPDF because that trade-off is unnecessary. Modern browsers support WebAssembly, which makes it possible to run the same heavy processing that used to require a server directly on the client. There is no technical reason to upload a PDF for conversion in 2026. We decided to prove it.
How it works
PrivaPDF uses WebAssembly (Wasm) to run document-processing libraries at near-native speed inside your browser tab. When you select a file, it is read into memory locally using the browser's File API. The Wasm module processes the file, produces the output, and hands it back to you as a download. At no point does any network request carry your file data.
- WebAssembly processing — compiled C/C++ libraries execute in a sandboxed environment within the browser, delivering speed comparable to native desktop applications.
- Progressive Web App (PWA) — PrivaPDF installs on your device and works fully offline. Once cached, you can convert PDFs on a plane, in a hospital, or on an air-gapped workstation with no internet connection at all.
- No backend servers — there is no upload endpoint. The application is a static site served from a CDN. You can verify this yourself by opening DevTools > Network and watching for outbound requests during a conversion. You will see none.
Our privacy commitment
Privacy claims are easy to make and hard to verify. We designed PrivaPDF so that our claims are independently verifiable by anyone with a web browser:
- Zero file uploads — open your browser's Network tab before converting a file. No request containing file data will appear. Ever.
- Zero tracking — we do not use analytics scripts, fingerprinting libraries, or third-party trackers. Page loads are served from a static CDN with no server-side logging of user behavior.
- Verifiable architecture — because the entire application runs client-side, its behavior is transparent. The source code executing in your browser is the same code that produces your converted files. There is no hidden server-side component.
Who it's for
PrivaPDF is built for anyone who handles documents that should not be uploaded to third-party servers:
- Legal professionals — contracts, NDAs, court filings, and privileged communications that must remain confidential under attorney-client privilege.
- Healthcare workers — patient records, lab results, and insurance documents protected by HIPAA and equivalent regulations worldwide.
- Finance professionals — tax filings, bank statements, financial models, and audit reports that contain sensitive personal or corporate data.
- Government and public-sector employees — classified or sensitive documents that cannot leave approved systems.
- Anyone who values privacy — you should not have to trust a random website with your personal documents just to convert a file format.
The team
PrivaPDF is developed by a small, independent team focused on building tools that respect user sovereignty. We are not backed by venture capital, which allows us to prioritize privacy over growth metrics.
You can find us on LinkedIn or Twitter/X where we share updates on browser-based privacy technology.
Transparency
PrivaPDF is operated as a transparent project. We believe that security tools should be open about their operations and revenue models.
- Business Model — we make money through optional Pro and Business subscriptions. We do not sell data, we do not show ads, and we do not use your files for any purpose other than the conversion you requested.
- Independence — we are self-funded and independent. This ensures our only loyalty is to our users and their privacy.
- Open Core — while the PrivaPDF UI is proprietary, the heavy lifting is done by proven, open-source libraries like MuPDF and Tesseract, ensuring the security of the underlying engine.