PDF Toolkit

Encrypt PDF

Encrypt PDF with AES — set permissions for print/copy/modify.

Use Cases

Typical scenarios for Encrypt PDF — see if it fits before you start

Encrypt PDF · Scenario 1

Before sending contracts, set open passwords. Encrypt PDF rewrites headers locally with strength feedback.

Encrypt PDF · Scenario 2

If recipients forget passwords, Encrypt PDF clears restrictions after correct password for redistribution.

Encrypt PDF · Scenario 3

For redacting IDs, Encrypt PDF's redact is irreversible and leaves no cloud trace.

How to Use

  1. Upload — Click or drag PDF/images to the dashed zone. Multi-file and large files (<100MB per batch recommended) are read locally only.
  2. Configure & process — Set pages, angle, password or quality, then hit “Calculate / Process”. Encrypt PDF runs via WebAssembly and pdf-lib in your browser — no server queue.
  3. Preview & download — Check pages, size and thumbnails on the right, then download. Batch jobs download one by one; tweak and re-run if needed.

Tips & Notes

  • Page syntax: Use 1,3,5-7 or 1-10,15; empty means all. Out-of-range pages are ignored.
  • Privacy & size: Everything runs locally — no server upload. For large files, process in batches of 50–100 pages.
  • Fidelity: Fonts and vectors are preserved where possible. For scanned PDFs, run OCR/searchable PDF first, then convert.

Features

  • Encrypt/decrypt/clear restrictions
  • Password hints
  • Local for sensitive files

Supported Formats

Input
PDF
Output
PDF

All conversions run locally in the browser; check fidelity in desktop for complex layouts.

FAQ

Will files be uploaded? Is Encrypt PDF safe?

No. Encrypt PDF runs 100% in your browser via File API; no network upload, memory cleared when you close the tab.

Processing failed or download blocked?

Check page ranges, passwords and file integrity. If the browser blocks multiple downloads, allow “automatic downloads” or click links one by one.

How to chain with other security tools?

Combine workflows: organize pages first, then compress/convert for submission, then protect/sign for delivery.

How to use

Encrypt PDF with AES — set permissions for print/copy/modify.

Decrypt PDFDecrypt encrypted PDF with password — remove restrictions. Password Protect PDFAdd password protection to PDF — set user password locally. Protect PDFEncrypt PDF with password — set owner & user passwords, restrict printing/copying. Redact PDFRedact sensitive text in PDF — black out and remove content permanently. Add Image to PDFInsert images into PDF pages — position, resize and rotate. Add Link to PDFAdd clickable hyperlink to PDF pages — URL annotation.
📖How to Password Protect a PDFSet open password and permission controls for contracts — local encryption with real-time strength feedback.📖How to Redact Sensitive Content in PDFIrreversibly black out sensitive data — remove text layer for legal and compliance sharing.

All calculations run locally in your browser; nothing is uploaded.