Most online PDF tools require you to upload your document to their servers. This means your contracts, IDs, medical forms, and financial documents pass through a third-party company's infrastructure. pdfeditor.onl works differently.
When you upload a PDF to a typical online editor, your file is transmitted to their servers, processed there, and then sent back to you. During that time, the service has access to your document. Even if they promise to delete it, you cannot verify this. For sensitive documents, this is an unacceptable risk.
WebAssembly (WASM) is a technology supported by all modern browsers that allows high-performance code to run directly in your browser — just like a native application. pdfeditor.onl uses WebAssembly to run the entire PDF processing pipeline (pdf-lib, pdfjs) inside your browser's sandbox, with no server communication required.
When you open a PDF on pdfeditor.onl, the file is read into your browser's local memory (RAM). All operations — merging, splitting, compressing, signing, OCR — happen in that local memory. When you close the tab, that memory is freed and your document is gone. No copy exists anywhere outside your device.
Legal professionals handling contracts and NDAs; healthcare workers dealing with patient records; government employees working with classified documents; anyone submitting personal ID documents or financial records. But privacy benefits everyone — even uploading an everyday invoice to a cloud service contributes to a data footprint you don't control.
No. pdfeditor.onl does not send your files to any third party. All processing is local. Not even the pdfeditor.onl team can see your documents.
The site uses Google Analytics to track aggregate usage metrics (page views, session counts). This does not involve collecting or transmitting your PDF content.
Yes. WebAssembly runs inside the browser's security sandbox, which isolates it from your operating system and other applications. It cannot access your file system beyond what you explicitly allow.