How browser-only security works
No uploads
Traditional online tools often send your files to a server for processing. Secure PDF Tools uses JavaScript libraries (such as pdf-lib) that execute inside your browser tab. Open your browser's Developer Tools → Network tab while using any tool: you should see no requests carrying your PDF content to our origin.
No persistence
We do not save your inputs to localStorage, sessionStorage, or cookies. When you finish a task or leave the page, references are cleared so memory can be reclaimed. Download links use short-lived blob URLs that are revoked after use.
Static hosting
The website is a static site: HTML, CSS, and JavaScript files served from a CDN or static host. There is no backend API that receives your PDFs for processing.
Honest limitations
Browser-based processing uses your device's memory and CPU. Very large PDFs may be slower than server tools. Some advanced features (heavy PDF compression, OCR) are not feasible purely client-side; we focus on merge and split that work well without a server.
Verify yourself
- Open PDF Merge or PDF Split and load a sample PDF.
- Open Network tab in DevTools and filter by your site.
- Run the tool — confirm no POST/PUT with file payloads.
- Check Application → Storage — no saved tool data.