Security

Last updated: October 9, 2026

Built so your data can't leak

Most online tools upload your files to a server. PDF Prem is designed the opposite way — there is no server receiving your files, so there is nothing to hack, leak or sell.

How we protect you

• 100% client-side processing: every tool runs as JavaScript in your browser. Your PDFs, photos and documents never leave your device.
• Local AI: the Background Remover and Image-to-Text AI models run on your device after a one-time download. Your images are never sent to an AI server.
• Strict Content Security Policy (CSP): every page declares exactly which scripts may run, blocking injected or malicious code.
• Subresource Integrity (SRI): third-party libraries are verified by cryptographic hash before your browser executes them.
• No eval, no obfuscation: our code contains no hidden behaviour — what you see is what runs.
• HTTPS ready: serve the site over HTTPS (recommended) so the connection between you and the site is encrypted. Some tools (like Screen Recorder) require HTTPS by browser design.

What this means for you

Even if someone compromised our web hosting, they could not access your files — because your files were never there in the first place. The worst case is a defaced page, never a data breach of your documents.

Tips to stay safe

• Always check you're on the correct address: pdfprem.com.
• Keep your browser updated — modern browsers enforce the protections above.
• Don't enter passwords or highly sensitive secrets into any online tool, ours included.

Report a security issue

Found something that looks wrong? Please tell us through the DinTechLab YouTube channel so we can fix it quickly. We appreciate responsible disclosure.