About this tool
Password protect is part of Techclick PDF Studio, a 100% free online PDF toolkit built by Techclick Infosec. AES-256 encrypt · qpdf. Every tool is free forever — no ads, no upsells, no daily limits. This tool needs server-side processing. Your file stays on our server only as long as the operation runs and is auto-deleted within 24 hours; we never train AI models on your documents and never share files with third parties.
Encryption uses AES-256 — the same standard used by banks and government portals. Useful for emailing Form 16, GST returns or signed contracts.
How it works
- Click Open Password protect above.
- Drop your PDF into the upload area.
- Adjust the options if needed — defaults work for most documents.
- Download the processed file. Done.
Why Techclick PDF Studio
- 100% free, forever — every tool, every feature. No paywall, no Pro tier, no upsells.
- No ads anywhere — unlike iLovePDF, Smallpdf and others that pepper the page with ads on free tier.
- No daily task cap — competitors like Smallpdf throttle you to ~2 tasks/hour; we don't throttle anyone.
- Privacy by default — files auto-delete within 24 hours, AES-256 encryption available on every tool.
- Hindi + English OCR — useful for Indian government and academic documents.
- AI built in — Chat with PDF, AI Summary, AI Translate and Smart Redact are part of the same free studio.
Related Security & OCR
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