buncha.tools
buncha/pdf/pdfprotect

PDF Password Protect

Your files never leave your browser. Encryption runs locally via qpdf-wasm.

Pairs well with

HTML to PDF
Convert HTML to PDF. Paste HTML or upload a file. …
Markdown to PDF
Convert Markdown to PDF with proper formatting. Co…
PDF Compare
Compare two PDF documents side by side. Text diff …
PDF Compress
Reduce PDF file size while keeping quality.

About PDF Password Protect

Add AES-256 password protection to a PDF document with optional permission controls.

Everything happens on your device. Close the tab and it's gone.
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Built browser-first. Run by one developer.
Every tool runs on your device. No tracking pixels, no sign-up to start. The numbers below are pulled live from the registry.
386
Free tools
Across 14 categories
27
AI tools
Powered by Claude API
Files never uploadNo tracking pixelsNo sign-up neededWorks in any modern browser
The handful of AI tools (paraphrase, summarise, blog, captions, etc.) send your prompt text to Anthropic's Claude API to do the work. Files, images, PDFs and video never leave your device. Pick the tools that fit your privacy comfort.