UtilityGlen

File Encryptor & Decryptor

Securely lock or unlock any file locally in your browser using advanced Web Crypto API (AES-GCM).

Local & Private

Protect your file in seconds

Choose a file, enter a password, then encrypt or decrypt it directly in your browser.

Files never leave your device
Any file type

Drop a file here or click to browse

PDF, images, archives, documents and more

Used locally only

Understanding Browser-Based Encryption

A guide to how client-side cryptography protects your documents securely.

Web Crypto API

Leverages native cryptographic functions built directly into modern web browsers for high-speed, secure calculations without third-party plug-ins.

Core: Native Engine

PBKDF2 Key Derivation

Stretches your password using thousands of hashing iterations to safeguard against brute-force password guessing attacks.

Strategy: Password Stretching

Zero Server Uploads

Your files stay completely on your machine. Nothing is transmitted over the internet, guaranteeing absolute file privacy.

Comparison: Local Processing

Why Use a Browser-Based File Encryptor

Secure your personal documents locally and protect your privacy without installing third-party software.

Instant Local Cryptography

Protecting sensitive personal data, confidential work files, or private archives before sending them over the internet can often feel complex, expensive, or risky when relying on third-party cloud services.

Our File Encryptor & Decryptor eliminates these risks by instantly leveraging your browser's native Web Crypto API to lock and unlock any file format using military-grade AES-GCM encryption entirely on your own device.

Secure

AES-GCM Encryption

Protects your files using advanced symmetric encryption algorithms relied upon globally for data safety.

Protected

PBKDF2 Key Stretching

Transforms your custom password using thousands of hashing iterations to thwart brute-force cracking attempts.

Universal

Any File Format

Seamlessly lock or unlock PDFs, images, archives, text documents, or custom spreadsheets without restriction.

Native

Browser Web Crypto API

Performs high-speed cryptographic tasks directly via your browser's built-in optimized engine code.

Adaptive

Smartphone Ready

Engineered for smooth responsive performance on mobile phones, tablets, and desktop computers.

Private

Zero Server Uploads

Your files never leave your machine. Everything processes locally on your device for total data confidentiality.

Frequently Asked Questions

Got questions about the File Encryptor & Decryptor? Find quick answers below.

Is the File Encryptor & Decryptor tool free to use?

Yes, our File Encryptor & Decryptor tool is 100% free to use on UtilityGlen with no hidden fees, subscriptions, or usage limits required.

Does the File Encryptor & Decryptor tool upload my data?

No, your data never leaves your browser. All generation and calculations are executed locally on your device for total privacy.

Can I use the File Encryptor & Decryptor tool on mobile?

Yes, our File Encryptor & Decryptor tool is fully responsive and optimized to work seamlessly on smartphones, tablets, and desktop browsers alike.

UtilityGlen

Handy web tools for daily use. Everything runs right in your browser—no sign-ups, no cloud uploads, and your data stays entirely on your device.

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