What is the Encryption/Decryption Tool?

This tool lets you encrypt plaintext into ciphertext and decrypt ciphertext back to plaintext using industry-standard symmetric encryption algorithms. All processing is performed entirely in your browser — no data is ever sent to a server.

Supported Algorithms

AES-CBC

Advanced Encryption Standard with 128, 192, or 256-bit keys. The most widely used symmetric encryption algorithm, trusted by governments and organizations worldwide.

DES-CBC

Data Encryption Standard with 64-bit keys. An older algorithm, useful for compatibility with legacy systems.

TripleDES-CBC

Triple DES with 192-bit keys. Applies DES three times for enhanced security over standard DES.

RC4

A stream cipher with 128-bit keys. Fast and simple, but considered less secure for modern applications.

Your Data Stays Private

All encryption and decryption happens in your browser:

100% Client-Side Processing: Your text and keys never leave your device. Everything runs locally using JavaScript with no server communication or data tracking.

No uploads — Your text and keys never leave your device
No server processing — Everything runs locally using JavaScript
No tracking — We don't collect or store any of your data

How to Use

Encrypting Text

Select Mode

Select Encrypt mode (active by default)

Choose Algorithm

Choose an algorithm from the dropdown (default: AES-256-CBC)

Enter Text

Enter your text in the input panel

Set Secret Key

Enter a secret key or click Generate to create a random key

Configure IV

The IV (Initialization Vector) is auto-generated if left empty, or enter a custom IV

Get Results

The encrypted output appears automatically in the output panel

Save Credentials

Copy the output, key, and IV — you'll need all three for decryption

Important: Save your key, IV, and algorithm choice. All three are required to decrypt your data later.

Decrypting Text

Select Mode

Select Decrypt mode

Match Algorithm

Choose the same algorithm used for encryption

Paste Ciphertext

Paste the ciphertext in the input panel

Enter Credentials

Enter the same secret key and IV used during encryption

Verify Formats

Make sure the key format and output format match what was used during encryption

View Plaintext

The decrypted plaintext appears in the output panel

Decryption Tip: Ensure all parameters (algorithm, key, IV, and formats) exactly match those used during encryption for successful decryption.

Key and IV Formats

Keys and IVs can be entered in three formats:

UTF-8

Plain text format
mysecretpassword

Hex

Hexadecimal string
a1b2c3d4e5f6...

Base64

Base64-encoded string
YWJjZGVmZ2g=

When using Generate, keys and IVs are created in Hex format with the correct length for the selected algorithm.

Features

Multiple Encryption Algorithms

Choose from six algorithm options to match your security needs:

AES-256-CBC

Strongest option with 256-bit key

Maximum security
Government-grade encryption
Recommended for sensitive data

AES-192-CBC

Strong encryption with 192-bit key

High security level
Balanced performance
Industry standard

AES-128-CBC

Standard encryption with 128-bit key

Good security
Fast processing
Wide compatibility

DES-CBC

Legacy compatibility with 64-bit key

Older standard
Legacy system support
Limited security

TripleDES-CBC

Enhanced DES with 192-bit key

Triple encryption
Better than DES
Backward compatible

RC4

Stream cipher with 128-bit key

Fast processing
No IV required
Simple implementation

Secure Key Generation

Generate cryptographically secure random keys and initialization vectors with a single click. Keys are generated at the correct length for the selected algorithm.

Cryptographically Secure: Our key generator uses your browser's built-in cryptographic functions to create truly random keys that meet security standards.

Flexible Input/Output Formats

Input Formats

Key Entry Options

UTF-8 plain text
Base64 encoded
Hexadecimal string
Auto-padding for short keys
Auto-truncation for long keys

Output Formats

Encrypted Output

Base64 format
Hexadecimal format
Easy to copy
Ready for storage
Compatible with decryption

Real-Time Processing

Encryption and decryption happen automatically as you type, with a 300ms debounce to keep the interface responsive. Press Ctrl+Enter or Enter in the key field for immediate processing.

Instant feedback as you type
Smooth, responsive interface
Keyboard shortcuts for quick processing
No manual submit button needed

Sample Data

Click the sample button to quickly load example data with a randomly generated key and IV, so you can see the tool in action immediately.

Try It Out: Use the sample data feature to explore how encryption works without entering your own data first.

Frequently Asked Questions

Which algorithm should I use?

AES-256-CBC is recommended for most use cases. It provides the highest level of security among the available options and is widely used in industry standards.

Best Practice: Use AES-256-CBC for encrypting sensitive data, personal information, or any content requiring maximum security.

What is an IV (Initialization Vector)?

An IV is a random value used alongside the key to ensure that encrypting the same text twice produces different ciphertext. For CBC mode algorithms, an IV is required. If you leave the IV field empty during encryption, one is automatically generated for you.

Why it matters: Without an IV, identical plaintext would always produce identical ciphertext, making patterns easier to detect and potentially compromising security.

Do I need to save the IV?

Yes. To decrypt your ciphertext, you need the same key, IV, and algorithm that were used during encryption. Make sure to save all three values.

Critical: Without the exact IV used during encryption, your data cannot be decrypted, even with the correct key and algorithm.

Save the encryption algorithm name
Save the complete key value
Save the complete IV value
Note the key and output formats used

What happens if my key is too short or too long?

Keys shorter than the required length are automatically padded with zeros. Keys longer than required are truncated to the correct length. For best results, use the Generate button to create a key with the exact required length.

Algorithm	Required Key Length	Auto-Adjustment
AES-256-CBC	256 bits (32 bytes)	Padded/Truncated
AES-192-CBC	192 bits (24 bytes)	Padded/Truncated
AES-128-CBC	128 bits (16 bytes)	Padded/Truncated
TripleDES-CBC	192 bits (24 bytes)	Padded/Truncated

Is my data secure?

Yes. All encryption and decryption is performed entirely in your browser using JavaScript. Your text, keys, and encrypted output are never sent to any server. You can verify this by checking your browser's network tab.

Privacy Guarantee: This tool operates 100% client-side. No data transmission occurs, ensuring complete privacy and security for your sensitive information.

Zero server communication
No data logging or storage
No cookies or tracking
Open-source verification available
Works offline after initial page load

Why does RC4 not have an IV field?

RC4 is a stream cipher that does not use an initialization vector. It only requires a key to encrypt and decrypt data. When you select RC4, the IV section is automatically hidden.

Technical note: Unlike block ciphers (AES, DES, TripleDES) that operate on fixed-size blocks and require IVs for CBC mode, RC4 generates a keystream that is XORed with the plaintext, eliminating the need for an IV.