Password Protected File Zipper
Password protect ZIP files with AES-256 encryption. Compress and secure sensitive data in your browser — no uploads, no servers, total privacy.
Drag & drop files here
or click to browse
0 = no compression / fastest
9 = maximum compression / slowest
Your files are encrypted entirely in your browser using zip.js with AES-256. They never leave your device. No uploads, no storage, no tracking.
Password Protect ZIP Files Instantly — Military‑Grade AES-256 Encryption
Our password protected file zipper lets you compress and encrypt sensitive documents, images, or any file into a secure AES-256 encrypted ZIP archive — directly in your browser. Unlike legacy ZipCrypto, which is notoriously weak and can be cracked in minutes, AES-256 is the gold standard used by governments, banks, and military organizations worldwide.[reference:0][reference:1] All processing happens locally, meaning your files never leave your computer. No uploads, no servers, no third parties.
Military‑grade encryption standard — the same level used by banks, governments, and security professionals worldwide.
Your files never leave your device. Zero uploads, zero servers, zero tracking. Complete privacy and security.
Combine AES-256 encryption with adjustable ZIP compression. Save space while keeping files locked.
Enforces minimum password length and provides security guidance to ensure your encrypted files remain protected.
Simply drag files into the upload area — no browsing required. Supports multiple files at once.
Once loaded, the tool works offline — no internet connection needed to encrypt your files.
How to Password Protect a ZIP File Online for Free
1. Drag and drop your files into the upload area, or click to browse and select multiple files.
2. Adjust the compression level using the slider — 0 (store only, fastest) to 9 (maximum compression, slowest).
3. Enter a strong encryption password (minimum 6 characters).
4. Click "Create Password-Protected ZIP" to start compressing and encrypting.
5. Watch the real‑time progress bar as your secure archive is created.
6. Download your password‑protected ZIP file — it will require the password to open.
Why AES-256 Matters for Your Sensitive Data
Legacy ZIP password protection (ZipCrypto) is dangerously flawed. Security experts report that 87% of ZipCrypto-protected files can be cracked within hours, rising to 97% within a week.[reference:2] Using standard Windows ZIP encryption leaves your financial records, legal documents, and personal information vulnerable to off‑the‑shelf hacking tools.[reference:3] Our tool uses AES-256, the encryption standard approved by the U.S. Federal Information Processing Standard (FIPS) — the same level used to protect classified government data and global financial transactions.[reference:4][reference:5] This is the only real protection for sensitive data.
Perfect for Confidential Information Sharing
Our secure file compression tool is ideal for: sending tax documents and financial statements, sharing legal contracts and client NDAs, protecting medical records (PHI), securing intellectual property, delivering design assets and source code to clients, archiving personal photos and backups, and any scenario where confidentiality is critical.
Understanding Password Strength & Best Practices
To maximize the security of your encrypted ZIP archive, follow these best practices: use passwords with at least 12 characters, combine uppercase and lowercase letters, numbers, and special symbols. Avoid using easily guessed information like names, birthdays, or common dictionary words.[reference:6] Never send your password through the same channel as the encrypted file. Consider using a password manager to generate and store strong, unique passwords.
Frequently Asked Questions
Learn how to use this tool correctly by reading our step-by-step tutorial.
