Decode AES

Decrypt AES-encrypted text online with support for multiple modes and input formats.

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7,996+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how Decode AES processes input data instantly inside your browser.

Sample Input Minified string: {"id":1,"status":"active","roles":["admin"]}

Computed Result

{
  "id": 1,
  "status": "active",
  "roles": [
    "admin"
  ]
}

Execution Mode Client-Side In-Browser JS

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About This Tool

This AES Decryption Tool allows you to decrypt text that has been encrypted using the Advanced Encryption Standard (AES) algorithm. Simply paste your encrypted text, provide the decryption key and initialization vector (IV), select the encryption mode (CBC, ECB, or GCM), and choose your input format (Base64 or hex). The tool uses the Web Crypto API for secure, client-side decryption without sending your data to any server. Perfect for developers, security professionals, and anyone needing to decrypt AES-protected content.

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How to Use

Paste your AES-encrypted text into the 'Encrypted Text' field
Enter your decryption key (must be 16, 24, or 32 bytes for AES-128, AES-192, or AES-256 respectively)
Provide the Initialization Vector (IV) if using CBC or GCM mode (16 bytes)
Select the encryption mode used (CBC, ECB, or GCM)
Choose the input format of your encrypted text (Base64 or hexadecimal)
Click 'Decrypt AES' to process the decryption
View your decrypted text in the results section with options to copy

Frequently Asked Questions

Find Quick Answers

What AES modes does this tool support?

The tool supports AES-CBC, AES-ECB, and AES-GCM modes. CBC and GCM require an Initialization Vector (IV), while ECB does not use an IV.

What key lengths are supported?

The tool supports AES-128 (16-byte key), AES-192 (24-byte key), and AES-256 (32-byte key). Your key must match the exact length required by the encryption algorithm used.

Is my data sent to a server for decryption?

No, all decryption happens entirely in your browser using the Web Crypto API. Your encrypted data, key, and IV never leave your device, ensuring maximum privacy and security.

What input formats are supported for the encrypted text?

The tool supports Base64-encoded and hexadecimal (hex) input formats. Make sure to select the correct format that matches how your encrypted text is encoded.

Why is my decryption failing?

Common reasons include: incorrect key length, wrong IV (for CBC/GCM modes), mismatched encryption mode, incorrect input format selection, or corrupted encrypted data. Ensure all parameters match those used during encryption.

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