How private browser-based PDF processing works
Local tools run document code in your browser tab instead of sending the selected file to a conversion server.
The browser is the processing environment
Modern browsers can run PDF, image, compression and OCR libraries through JavaScript and WebAssembly. When you select a file, the browser grants the page temporary access to that file for the operation you requested. PDF Creator performs that operation in the tab.
The output is represented by a temporary browser URL. Downloading saves it to your device. Refreshing, closing the tab or starting another job removes the temporary reference from the page.
Local does not mean unlimited
Processing uses your device’s memory and CPU. A 50 MB PDF can require much more than 50 MB while pages are decoded into pixels. Long scans, OCR and high-resolution image export are therefore slower on phones and older computers.
If the browser runs out of memory, split the document or use a desktop computer. Close unused tabs before a large job and avoid processing sensitive files on shared devices where downloads may remain accessible.
What still reaches the website
The web server delivers the application code, fonts and worker files. If analytics or advertising is enabled, those services may receive ordinary page-visit information according to the privacy and cookie policies. The document content itself is not included in those requests.
You can verify the architecture in the privacy policy and by inspecting browser network activity. Clear explanations and narrow claims are more useful than vague statements that a service is simply ‘secure.’