security

Excel Unlocker — Remove edit protections, sheet locks, and workbook structure restrictions from Excel files. Runs entirely in your browser using the XML...

PDF Protect — Encrypt your PDF document with a user password and customize editing, printing, and copying permissions entirely in your browser.

PDF Unlock — Remove password protection from your encrypted PDF documents. Simply enter the password, verify the file contents, and download a decrypted...

Encrypt, unlock, or optimize a PDF with password protection — 256-bit AES encryption, decrypt, or linearize for fast web loading. All client-side, no upload.

Visually redact PDF content by drawing black rectangles over sensitive areas. Multiple rectangles, apply to all pages. All local, no upload.

Stamp text watermarks onto PDF pages: tile or center diagonal. Adjust font, opacity, rotation, color. Preview before download. Private, no upload.

Calculate file or text hashes online — MD5, SHA-1, SHA-256, SHA-512. Verify file integrity by comparing a known checksum. Free, in your browser.

Encrypt and decrypt messages with PGP right in your browser. Generate RSA 4096 key pairs. 100% client-side — keys never leave your device.