buncha.tools
buncha/pdf/pdfprotect

PDF Password Protect

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

Pairs well with

PDF Sign
Sign PDF documents online. Draw your signature and…
PDF Merge
Combine multiple PDF files into one document.
PDF Split
Extract pages or split a PDF into individual files…
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.

Like every tool on Buncha, this one runs entirely in your browser. There's no upload, no log, no record of what you've pasted or generated. Close the tab and the data is gone.

↳ Have feedback or found a bug? hello@buncha.tools
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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.
240
Free tools
Across 14 categories
7
Visual editors
PDF · image · video · audio
32
Curated kits
By profession + lifestyle
17
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.